E Rohwer: LIST OF PUBLICATIONS
(updated Sept 2010)
PEER REVIEWED RESEARCH PUBLICATIONS
1.
Solute focusing in capillary gas-liquid chromatography: stationary phase focusing;
V.Pretorius, E.R.Rohwer and K.H.Lawson; S.-Afr. Tydskr. Chem. 37(1984)65-66
2.
Manufacture by electroforming, of thin-walled nickel capillary columns for gas-liquid
chromatography; V.Pretorius, E.R.Rohwer, P.J.Apps, K.H.Lawson and J.Giesel;
J.Chromatogr. A 289(1984)17-29
3.
Solute focusing, using the solvent effect in capillary GLC:
The solvent effect in the presence of stationary phase;
V.Pretorius, K.H.Lawson, E.R.Rohwer and W.Bertsch;
HRC&CC 7(1984)92-94
4.
An experimental study of cooling during evaporation of liquid films; V.Pretorius,
P.Apps, E.R.Rohwer and K.H.Lawson; HRC&CC 7(1984)209-210
5.
The dynamic film concentrator - a new approach to large and dilute samples in GLC;
V.Pretorius, P.Apps, E.R.Rohwer and K.H.Lawson; HRC&CC 7(1984)212-214
6.
Solute focusing using the solvent effect - a mass spectrometric investigation of packed
bed inlets V.Pretorius, E.R.Rohwer, K.H.Lawson and P.J.Apps; HRC&CC
7(1984)142-143
7.
Deactivation of thin-walled nickel capillary columns for gas-liquid chromatography;
V.Pretorius, E.R.Rohwer, G.A.Hulse, K.H.Lawson and P.J.Apps; HRC&CC
7(1984)429-430
8.
The solvent effect in gas-liquid chromatography V.Pretorius, K.H.Lawson,
E.R.Rohwer and P.J.Apps Proceedings of the A.J.P.Martin memorial symp. Editor
F.Bruner, Elsevier, 1985, pp347-357
9.
A means of improving the performance of heat- shrinkable, polytetrafluoroethylene
joints in capillary gas-liquid chromatography; V.Pretorius, P.J.Apps, E.R.Rohwer and
K.H.Lawson; HRC&CC 8(1985)77-78
10.
A device for monitoring the static coating of capillary columns for gas-liquid
chromatography; E.R.Rohwer, V.Pretorius and G.A.Hulse; HRC&CC 8(1985)693694
11.
Volatile flavour components of maroela juice; V.Pretorius, E.R.Rohwer, A.Rapp,
L.C.Holtzhausen and H.Mandery; Z. Lebensm. Unters. Forsch. 181(1985)458-461
12.
Deactivation, coating and performance of nickel capillary columns for GLC;
E.R.Rohwer, V.Pretorius and G.A.Hulse; HRC&CC 9(1986)30-34
1
Also in: Proceedings of the sixth international symposium on capillary
chromatography, 1985, Riva del Garda, Italy, p.39-47
13.
A Joule-Thomson cooler for stationary-phase - or thermal focusing in capillary GLC;
V.Pretorius, E.R.Rohwer and K.H.Lawson; HRC&CC 9(1986)298-300
14.
Simple press-fit connectors for flexible fused silica tubing in GLC; E.R.Rohwer,
V.Pretorius and P.J.Apps; HRC&CC 9(1986)295-297
15.
Hybrid fused silica/glass capillary columns for GLC; E.R.Rohwer and V.Pretorius;
HRC&CC 10(1987)145-147
16.
Trace analysis of complex organic mixtures using capillary gas-liquid chromatography
and the dynamic solvent effect; P.J.Apps, V.Pretorius, K.H.Lawson, E.R.Rohwer,
M.R.Centner, H.W.Viljoen and G.Hulse; HRC&CC 10(1987)122-127
17.
Volatile constituents of the spineless monkey orange; V.Pretorius, E.R.Rohwer,
A.Rapp and H.Mandery; Deutsche Lebensmittel-Rundschau 83(6)(1987)180-182
18.
Fast pulsed-laser induced electron generation for electron impact mass spectrometry;
E.R.Rohwer, R.C.Beavis, C.Köster, J.Lindner, J.Grotemeyer and E.W.Schlag;
Z Naturforsch. 43a(1988)1151-1153
19.
Volatile components of the anal gland secretion of the striped polecat, Ictanyx
striatus; P.J.Apps, H.W.Viljoen, V.Pretorius, E.R.Rohwer; S.Afr.Tydskrif.Dierk.
23(2)(1988)136-137
20.
Supercritical fluid injection - multiphoton ionisation mass spectrometry; C.Köster,
J.Grotemeyer, E.R.Rohwer, J.Lindner and E.W.Schlag; Advances in Mass
Spectrometry vol. 2b, Heyden and Sons Ltd, London, 1989, p.1192-1193
21.
Low-cost liquid chromatography.iv."Pulsed open tube gradient generation", a new
approach for generating nanoliter volume linear and tailored gradients for capillary
electrophoresis and micro LC; V.Berry and E.R.Rohwer; J Liquid Chrom.
13(8)(1990)1529-1558
22.
Headspace gas chromatography of flowers by dynamic solvent effect inlet and pattern
recognition of species specific fragrance profiles; E.R.Rohwer, M.E.C.Erasmus,
P.J.Robbertse and H.P.Wolmarans; Proceedings of the 13th International Symposium
on Capillary Chromatography. vol 1. Riva del Garda, Italy, 13-16 May 1991, page
344-356.
23.
Phosphonic systems. 6. Diethyl 2-methylpentenyl-phosphonates as a model for studies
of the stability of unsaturated phosphonic esters; M.P.Belciug, A.M.Modro,
E.R.Rohwer and A.Zwierzak; Phosphorus, Sulfur and Silicon, 63(1991)57-64
24.
Rapid analysis of coke oven gas by capillary gas chromatography; W.J.Havenga and
2
E.R.Rohwer; Journal of High Resolution Chromatography 15(1992)381-386
25.
Photolysis of (Arylmethyl)triphenylphosphonium Salts. Substituent, Counterion, and
Solvent Effects on Reaction Products; C.Imrie, T.A.Modro, E.R.Rohwer, and
C.C.P.Wagener; Journal of Organic Chemistry 58(1993)5643-5653
26.
Preparation and Storage of Ultra High Purity Hexane for Solvent Effect Gas
Chromatographic Analysis; E.R.Rohwer, G-C Chen and A.J.Hassett; Journal of High
Resolution Chromatography 16(1993)561-564 (Also presented as a poster at - and
full length paper in the proceedings of - the Fifteenth International Symposium on
Capillary Chromatography, Riva del Garda, Italy, May 24-27, 1993)
27.
Rapid screening of Rolling Mill Oils using High Temperature Capillary Gas
Chromatography; W.J.Havenga and E.R.Rohwer; Journal of Chromatography
A,669(1994)139-150
28.
High Speed Analysis of H2S and COS Impurities in Coal Gas by Capillary Gas
Chromatography; J.B.Laurens and E.R.Rohwer; J.High Resol.Chromatogr.
19(1996)217-223
29.
Trace Analysis of Semi-Volatile Organic Air Pollutants Using Thick Film Silicone
Rubber Traps with Capillary Gas Chromatography; E.K.Ortner and E.R.Rohwer;
J.High Resol.Chromatogr. 19(1996)339-344 (Also presented as a oral presentation at
the 16th International Symposium on Capillary Chromatography, Riva del Garda, Italy,
Sept 27-30, 1994, see proceedings pp. 842-853)
30.
Quantitative Analysis of Volatile Sulphur Compounds in Beer using a Membrane
Extration Interface; A.Dercksen, J.Laurens, P.Torline, B.C.Axcell, E.Rohwer; Journal
of the American Society of Brewing Chemists 16(4)(1996)228-233
31.
Factors influencing breakthrough volumes when using sorption traps at high flow
rates; J.B.Laurens and E.R.Rohwer; J.High Resol.Chromatogr. 20(1997)119-121
32.
Hyphenation of Gas Chromatography and Resonance-Enhanced Laser Mass
Spectrometry (REMPI-TOFMS): A Multidimensional Analytical Technique; R
Zimmermann, U Boesl, H Heger, E Rohwer, E Ortner, E Schlag and A Kettrup; J
High Resol. Chromatogr. 20(1997)461-470
33.
Composition of the essential oil of Lippia Scaberrima Sond. from South Africa; F.C.
Terblanche, G.Kornelius, A.J.Hassett and E.R.Rohwer; J. Essential Oil Res.
10(Mar/Apr.1998)213-215.
34.
Coupling of Gas Chromatography with Jet-REMPI Spectroscopy and Mass
Spectrometry; R.Zimmermann, H.J.Heger, E.R.Rohwer, E.W.Schlag, A.Kettrup,
U.Boesl; Proceedings of the 8th Resonance Ionization Spectroscopy Symposium 1996,
American Institute of Physics (AIP)-Conference Poceedings 388, AIP-Press New
York (1997)119-122
3
35.
Resonance Ionization Laser Mass Spectrometry: New Possibilities for On-Line
Analysis of Waste Incinerator Emissions; R.Zimmermann, E.R.Rohwer, H.J.Heger,
E.W.Schlag, A.Kettrup, G.Gilch, D.Lenoir, U.Boesl.; Proceedings of the 8th
Resonance Ionization Spectroscopy Symposium 1996, American Institute of Physics
(AIP)-Conference Poceedings 388, AIP-Press New York (1997) 123-126
36.
A novel interface for optimized coupling of gas chromatography and supersonic jet
spectroscopy; H J Heger, R Dorfner, R Zimmermann, E R Rohwer, U Boesl, A
Kettrup.; J High Resolution Chromatography 22(1999)391-394
37
Dynamic modification of the stationary phase in capillary gas chromatography. II.
Continuous introduction of water vapour; G-C Chen and E R Rohwer
J Chromatography A, 845(1999)43-52
38
Analysis of alkane, alkene, aromatic and oxygenated groups in petrochemical
mixtures by supercritical fluid chromatography on silica gel; A Venter, E R Rohwer
and A E Laubscher; J Chromatography A, 847(1999)309-321
39
Chemical characterization and screening of hydrocarbon pollution in industrial soils
by headspace solid-phase microextraction; W J Havenga and E R Rohwer
J Chromatography A, 848(1999)279-295
40
Trace determination of organic compounds in water by direct enrichment in
multichannel thick film silicone rubber traps with capillary gas chromatography;
E K Ortner and E R Rohwer; J High Resolution Chromatography 22(1999)521-526
41
In line catalytic derivitization method for selective detection of chlorinated aromatics
with a hyphenated gas chromatography/laser mass spectrometry technique: A concept
for comprehensive detection of isomeric ensembles; R Zimmermann, E R Rohwer
and H J Heger; Analytical Chemistry 71(1999)4148-4153
42
Analysis of odorous compounds in water by isolation by closed-loop stripping with a
multichannel silicone rubber trap followed by gas chromatography-mass spectrometry
A J Hassett and E R Rohwer; J Chromatography A 841(1999)521-528
43
Trapping efficiency of Aqueous pollutants in multichannel thick film silicone rubber
traps for capillary gas chromatography; E K Ortner and E R Rohwer;
J Chromatography A 863(1999)57-68
44
The analysis of organic vapours emitted from the plumes of pool fires on carpet
material; B-J de Vos, M Froneman and E R Rohwer; J Fire Sciences 17 (1999)383420
45
The use of SPME and GC-MS for the chemical characterisation and assessment of
PAH pollution in aqueous environmental samples; W J Havenga and E R Rohwer;
International Journal of Environmental Analytical Chemistry 78(3-4)(2000)205-222
4
46
A Capillary-Based Supersonic Jet Inlet System for Resonance-Enhanced Laser
Ionization Mass Spectrometry: Principle and First On-line Process Analytical
Applications; K Hafner, R Zimmermann, E R Rohwer, R Dorfner, and A Kettrup;
Analytical Chemistry; 73(17) (2001) 4171-4180.
47
Detection of petrol (gasoline) in fire debris by gas chromatography/Mass
Spectrometry (GC/MS/MS); B-J de Vos, M Froneman, E Rohwer and D Sutherland; J
Forensic Sci, July 2002, vol 47 no 4, pp 736-756
48
Analysis of cobalt, tantalum, titanium, vanadium and chromium in tungsten carbide
by inductively coupled plasma-optical emission spectrometry; M Archer, R I
McCrindle E Rohwer; J. Anal. At. Spectrom., 2003, 18, 1493-1496
49
Comprehensive two-dimensional supercritical fluid and gas chromatography with
independent fast programmed heating of the gas chromatographic column; A Venter
and E R Rohwer; Anal.Chem. 2004, 76, 3699-3706
50
On-Line Derivatization for Resonance-Enhanced Multiphoton Ionisation Time-of-Flight Mass Spectrometry: Detection of Aliphatic Aldehydes and Amines via
Reactive Coupling of Aromatic Photo Ionization Labels; M Fernandes-Whaley, F
Mühlberger, A Whaley, T Adam, R Zimmermann, E Rohwer and A Walte;
Aaccelerated article@ Anal.Chem. 2005, 77, 1-10
51
Investigating the use of element analysis for differentiation between the geographic
origins of Western Cape wines; P P Minnaar, E R Rohwer and M Booyse;
S.Afr.J.Enol.Vitic. 26(2)(2005)95-105
52
The analysis of illicit methaqualone containing preparations by Gas ChromatographyMass Spectrometry for forensic purposes; A A Grové, E R Rohwer, J B Laurens and
B C Vorster; J. Forensic Sci. 51(2), (2006) 376 - 380
53
Group-type analysis of oxygenated compounds with a silica gel Porous Layer Open
Tubular (PLOT) column and comprehensive two-dimensional supercritical fluid and
gas chromatography (SFCxGC), A Venter, P R Makgwane, E R Rohwer, Anal.
Chem. 2006 78(6) 2051-2054
54
Analysis of trace amounts of carbon dioxide, oxygen and carbon monoxide in nitrogen
using dual capillary columns and a pulsed discharge helium ionisation detector. M
Janse van Rensburg, A Botha and E Rohwer; J. Chromatography A; 1167 (2007) 102
-108
55
Volatile compounds, quality attributes, mineral composition and pericarp structure of
South African litchi export cvs. Mauritus and McLean=s Red; D Sivakumar, Y
Naude, E Rohwer and L Korsten. J.Sci.Food Agric 88:1074-1081 (2008)
5
56
Monitoring of trace organic air pollutants a developing country perspective; P.B.C.
Forbes and E.R. Rohwer, Air Pollution XVI, Editors CA Brebbia and JWS Longhurst;
WIT Transactions on Ecology and the Environment, 2008, vol 116, pp 345-355,
ISSN 1743-3541.
57
Multi-channel open tubular traps for headspace sampling, gas chromatographic
fraction collection and olfactory assessment of milk volatiles; Y Naude, M Van Aardt,
E R Rohwer; J.Chrom A 1216(2009) 2798 - 2804
58
Investigations into a novel method for atmospheric polycyclic aromatic hydrocarbon
monitoring. Patricia B C Forbes and Egmont R Rohwer; Environ. Pollut. 157 (2009)
2529 - 2535
59
Laser induced fluorescence of polycyclic aromatic hydrocarbons: An approach to gas
standards. P Forbes, A Trüe and E Rohwer; Environ. Chem. Lett. Ms. No. ECLE-D09-00033R1 published online 11 Sept 2009.
60
Application of laser induced fluorescence to monitor atmospheric polycyclic aromatic
hydrocarbons; P Forbes and E Rohwer; Air Pollution XVIII; Editors CA Brebbia and
JWS Longhurst; WIT Transactions on Ecology and the Environment, 2010, vol 136,
pp 369-377, ISSN 1743-3541.
61
Evidence for a geochemical origin of the mysterious circles in the Pro-Namib desert;
Yvette Naudé, Margaretha W van Rooyen, Egmont R Rohwer, research article
presented for publication in Journal of Arid Environments, Ref: JAE10-176
62
Comprehensive Two-Dimensional Gas Chromatography Time of Flight Mass
Spectrometry (GCxGC-TOFMS) for Environmental Forensic Investigations in
Developing Countries; Jayne de Vos, Roger Dixon, Gerhard Vermeulen, Peter GorstAllman, Jack Cochran, Egmont Rohwer and Jean-Francois Focant; research article
presented for publication in Chemosphere.
63
An evaluation of the analysis of polychlorinated dibenzo-p-dioxins and
polychlorinated dibenzofurans by GCxGCTOFMS; Jayne de Vos, Peter Gorst-Allman
and Egmont Rohwer; research article presented for publication in J. Chrom. A
OTHER PUBLICATIONS
1
Report to the Water Research Commission of South Africa: WRC Report No.
831/1/03 of April 2003: Development and implementation of gas and lquid
chromatographic organic water profiles as a management tool; M.I.Selala, S.Phirwa,
N.Segoe, E.R.Rohwer and C.Schoeman; ISBN no.1-77005-021-3
CONTRIBUTIONS AT INTERNATIONAL CONFERENCES (including full
6
length papers in conference proceedings)
1.
Poster presentation: A new interface for supercritical fluid chromatography - TOF
mass spectrometry; 5th Symposium on LC - MS, SFC - MS, MS - MS. Freiburg,
Germany, 2 - 4 Nov 1988. E.R.Rohwer, J.Grotemeyer, C.Köster, J.Lindner,
E.W.Schlag.
2.
Poster presentation: Pulsed laser induced electron generation for electron ionisation
mass spectrometry; R.C.Beavis, E.R.Rohwer, J.Lindner, C.Köster, J.Grotemeyer and
E.W.Schlag; 37th ASMS Conference on Mass Spectrometry and Allied Topics,
Miami Beach, Florida, 21-26 May 1989
3.
Poster presentation: Interfacing chromatographic techniques to muliphoton ionisation
mass spectrometry; C.Köster, E.R.Rohwer, J.Grotemeyer and E.W.Schlag; Proc. 37th
ASMS Conference on Mass Spectrometry and Allied Topics, Miami Beach, Florida,
21-26 May 1989
4.
Poster presentation: A new approach for generating linear and shaped gradients of
nanoliter volumes compatible with electrophoresis in capillaries; V.Berry and
E.Rohwer; Second International Symposium on High Performance Capillary
Electrophoresis
5.
Poster presentation: Isotope ratio measurements on nascent UF 6 photoproducts using
TOF-MS; R.C.Scales, E.R.Rohwer and H.G.C.Human; 12th International Mass
Spectrometry Conference, Amsterdam, 26-30 August 1991, Abstracts page 89.
6.
Invited lecture: Capillary gas chromatography and process control; E.R.Rohwer; 3rd
International Symposium on Analytical Chemistry in the exploration, mining and
processing of materials, Sandton Sun Convention Centre, Sandton, South Africa, 2-7
August 1992; Abstracts page 23
7.
Invited lecture: Laser induced ionization and time of flight mass spectrometry as
diagnostic tool in the processing of materials; H.G.C.Human and E.R.Rohwer; 3rd
International Symposium on Analytical Chemistry in the exploration, mining and
processing of materials, Sandton Sun Convention Centre, Sandton, South Africa, 2-7
August 1992; Abstracts page 34
8.
Invited lecture: Time-of-flight mass spectrometry of solids, gases and biopolymers
using laser ionization/desorption; H.J.Strydom, H.G.C.Human, C.R.Green and
E.R.Rohwer; Second International Workshop on Physics and Modern Applications of
Lasers, 6-14 September 1993, Harare, Zimbabwe. Full length paper in the
Proceedings, pp 260-269.
9.
Oral presentation at the "18th International Symposium on Capillary
Chromatography", 20 - 24 May 1996, Riva del Garda, Italy ; Laser Induced
Jet-REMPI-Mass Spectrometer as Isomer Selective Capillary Gas Chromatographic
Detector: An Approach for Rapid Environmental Analysis; R.Zimmermann,
7
H.J.Heger, A.Kettrup, K.-W.Schramm, E.R.Rohwer, E.K.Ortner, U.Boesl. Full length
paper in the Symposium Proceedings pp.61-75
10.
Oral presentation at "8th International Symposium on RIS, RIS-96, Resonance
Ionization Spectrometry & Its Applications", 30 June - 5 July 1996, The Penn State
Scanticon, State College, Pennsylvania, USA; Coupling of Gas Chromatography with
Jet-REMPI Spectroscopy and Mass Spectrometry; R.Zimmermann, H.J.Heger,
E.R.Rohwer, E.W.Schlag, A.Kettrup, U.Boesl. Reviewed paper in the Proceedings.
11.
Oral presentation at the A8th International Symposium on RIS, RIS-96, Resonance
Ionization Spectrometry & Its Applications; 30 June - 5 July 1996, The Penn State
Scanticon, State College, Pennsylvania, USA; Resonance Ionization Laser Mass
Spectrometry: New Possibilities for On-Line Analysis of Waste Incinerator
Emissions; R.Zimmermann, E.R.Rohwer, H.J.Heger, E.W.Schlag, A.Kettrup,
G.Gilch, D.Lenoir, U.Boesl. Reviewed paper in the Proceedings.
12.
Oral presentation at the "American Society of Brewing Chemists Annual
Convention", 11-15 May 1996, Chicago, Illinois, USA.; Quantitative analysis of
Volatile Sulphur Compounds in Beer using A Membrane Extraction Interface;
A.Dercksen, J.Laurens, P.Torline, B.Axcell, E.Rohwer
13.
Poster presentation at the "IQEC'96 - XX International Quantum Electronics
Conference", 14-19 July 1996, Sydney, Australia; A long range dipole-dipole
interaction mechanism for the vibrational energy exchange in SF6 and UF6 ;
E.Ronander, E.R.Rohwer, C.J.Liebenberg. Abstract in Proceedings.
14.
Poster presentation at the "26th International Conference on Combustion", 29 July - 2
August 1996, Naples, Italy; Sensitive and selective measuring techniques for the
on-line emission control of the exhaust gas of waste incinerators; H.J.Heger,
R.Zimmermann, E.R.Rohwer and U.Boesl
15.
Keynote lecture at the 20th International Symposium on Capillary Chromatography, 25
- 29 May 1998, Riva del Garda, Italy; Gas Chromatography - Laser Mass
Spectrometry (GC-REMPI-TOFMS): New supersonic jet inlet technique and catalytic
reactor for selective detection of chlorinated aromatics; R.Zimmermann, E.R.Rohwer,
H.J.Heger, R.Dorfner, U.Boesl, A.Kettrup; Full length paper (12 page) in proceedings
of the Symposium (CDROM)
16.
Poster presentation at the 7th International Chemistry Conference in Africa, 34th
Convention of the South African Chemical Institute, 6 - 10 July 1998, Durban, South
Africa; Gas chromatographic trace analysis of industrial air; A.C.Botha and E.R
Rohwer
17.
Poster presentation (abstracts in Proceedings) at the 22nd International Symposium on
Chromatography, 13 - 18 September 1998, Rome, Italy; GC-MS analysis of odorous
compounds in water; isolation by closed-loop stripping using a multi-channel silicone
rubber trap; A J Hassett and E R Rohwer
8
18.
Poster presentation (abstracts in Proceedings) at the 22nd International Symposium on
Chromatography, 13 - 18 September 1998, Rome, Italy; Trapping efficiency of
aqueous pollutants using multichannel thick film silicone rubber traps with capillary
gas chromatography; E K Ortner and E R Rohwer
19.
Poster presentation (abstracts in Proceedings) at the 22nd International Symposium on
Chromatography, 13 - 18 September 1998, Rome, Italy; The analysis of parafin,
olefin, aromatic and oxygenate groups in petrochemical mixtures by SFC on silica gel;
A Venter, E R Rohwer and A E Laubscher
20.
Poster presentation (abstracts in Proceedings) at the 22nd International Symposium on
Chromatography, 13 - 18 September 1998, Rome, Italy; Dynamic modification of the
stationary phase in capillary gas chromatography: I Introduction of low-volatility
selectors; G-C Chen and E R Rohwer
21
Poster presentation (abstracts in Proceedings) at the 22nd International Symposium on
Chromatography, 13 - 18 September 1998, Rome, Italy; Dynamic modification of the
stationary phase in capillary gas chromatography: II Continuous introduction of water
vapour; G-C Chen and E R Rohwer
21.
Invited plenary lecture presented at the three day seminar, jointly organised by
Protechnik Laboratories, International Co-operation and Assistance Branch of the
OPCW and the South African Council for the Non-Proliferation of Weapons of Mass
Destruction. ASAI 1999: First African Seminar on Analytical Issues related to the
CWC; 16-18 November 1999, Centurion, South Africa. Strategy for the rapid
analysis of trace organic compounds, E R Rohwer. Abstract in the Proceedings.
22.
Contributions as specialist advisor (organic trace analysis) of the South African
delegation to the United Nations Environmental Programme (UNEP) Workshop on
Management of Persistent Organic Pollutants (POPs) for the SADC Region. Lusaka,
Zambia, 14-16 February 2000.
23.
Contributions as official member of the South African delegation to the 4th Meeting of
the Intergovernmental Negotiating Committee (INC) for an International Legally
Binding Instrument for Implementing International Action on Certain Persistent
Organic Pollutants (POPs), Bonn, Germany, 20 - 25 March 2000
24.
Poster presentation (abstract in CD ROM proceedings) at the 23rd International
Symposium on Capillary Chromatography, 5-10 June 2000, Riva del Garda, Italy;
Analysis of VOCs by closed-loop stripping analysis and absorptive concentration; A J
Hassett, E R Rohwer, E K Ortner and B Cowan
25.
Poster presentation (abstract on page 519 of the Proceedings) at the 28th International
Symposium on Combustion, University of Edinburgh, Scotland, 30 July - 4 August
2000; Modification of a REMPI-TOFMS laser mass spectrometer for combustion
diagnostics: Implementation of a capillary supersonic jet inlet system; K Hafner, R
9
Dorfner, R Zimmermann, E R Rohwer, A Kettrup
26.
Contributions as official member of the South African delegation to the 5th and final
Meeting of the Intergovernmental Negotiating Committee (INC) for an International
Legally Binding Instrument for Implementing International Action on Certain
Persistent Organic Pollutants (POPs), Sandton, 4-9 December 2000
27.
Member of the organising committee (programme committee), Chairman of session
on Mass Spectrometry & Lasers, Colloqium Spectroscopicum Internationale, CSI
XXXII, Pretoria, 8 -13 July 2001
28.
Poster presentation: Detection of petrol in fire debris by gas chromatography / mass
spectrometry (GC/MS/MS) B-J de Vos, M Froneman, E Rohwer and D A Sutherland;
Conference Abstracts, P4-1, Colloqium Spectroscopicum Internationale, CSI XXXII,
Pretoria, 8 -13 July 2001
29.
Lecture: Negative ion chemical ionisation mass spectrometry for trace detection of
TNT; B D Debowski, S J van der Walt and E R Rohwer, Conference Abstracts, Th 38, Colloquium Spectroscopicum Internationale, CSI XXXII, Pretoria, 8 -13 July 2001
30.
Lecture: Building bridges between ancient knowledge and modern drug discovery
through chemical fingerprinting; M Horak, A J Hassett and E R Rohwer;
International Immunopharmacology Congress 2001; Sun City, Pilanesberg, South
Africa; 16-20 September 2001
31.
Session chair >Capillary GC= and invited Plenary Lecture PL.23: New
instrumentation for comprehensive SFCxGC; E Rohwer and A Venter, 25th
International Symposium on Capillary Chromatography, 13-17 May 2002, Riva del
Garda, Italy
32.
Poster presentation: Optimization of temperature programming rate for a fast,
resistively heated gas chromatographic column; A Venter and E R Rohwer; 25th
International Symposium on Capillary Chromatography, 13-17 May 2002, Riva del
Garda, Italy
33.
Poster presentation: Oxygenate group separation by supercritical fluid
chromatography coupled comprehensively to fast programmed gas chromatography
(SFCxGC), A Venter, P Makgwane and E R Rohwer; 25th International Symposium
on Capillary Chromatography, 13-17 May 2002, Riva del Garda, Italy
34.
Contributions, as only member from Africa, to the First Meeting of the Advisory
Group to the Global Network for the Monitoring of Chemicals in the Environment,
United Nations Environmental Programme (UNEP), Geneva, 13-14 May 2002
35.
Lecture at the 15th International Congress on Electron Microscopy; Penetration of
epoxy resin components through some glove materials, J Coetzee, E R Rohwer, A J
Hassett; 1-6 September 2002, Durban, South Africa. Abstract in Proceedings p452
10
36.
Contributions as national delegate of the South African Water Research Commission:
Global Water Research Coalition (GWRC) Workshop on Endocrine Disruptors, Farm
Inn, Pretoria, South Africa, 6-9 October 2002
37.
Contributions, as invited guest of the National Metrology Laboratory (CSIR), to the
SADCMET Workshop on : The Role of Metrology in Monitoring Food, Health and
the Environment in Southern Africa, CSIR Conference Centre, Pretoria, 20 Nov 2002
38.
Chair, sessions 4 on Chromatography and 19a on Instruments; keynote lecture:
Comparing comprehensively coupled techniques: Supercritical Fluid
Chromatography-Gas Chromatography, Gas Chromatography-Gas Chromatography
and Gas Chromatography-Mass Spectrometry; E R Rohwer, A J Hassett, E K Harden,
S Bauermeister, A Venter, A Zellelow, P Makgwane and W Welthagen; International
Symposium on Analytical Science, Analitika 2002, 4 - 10 December 2002,
Stellenbosch, South Africa
39.
Poster; Instrumentation for comprehensive two-dimensional supercritical fluid and
fast temperature programmed gas chromatography; A Venter and E R Rohwer;
International Symposium on Analytical Science, Analitika 2002, 4 - 10 December
2002, Stellenbosch, South Africa
40.
Poster; Analysis of South African essential oils by comprehensive two dimensional
supercritical fluid and gas chromatography, P Makgwane and E R Rohwer,
International Symposium on Analytical Science, Analitika 2002, 4 - 10 December
2002, Stellenbosch, South Africa
41.
Poster; Headspace-gas chromatography-mass spectrometry analysis of skatole and
other off-odours in boar fat, E K Harden, P Lubuma, E R Rohwer and H J de Kock;
nternational Symposium on Analytical Science, Analitika 2002, 4 - 10 December
2002, Stellenbosch, South Africa
42.
Poster; Optmization of comprehensive two-dimensional gas chromatography and the
analysis of diesel petroleum fractions; W Welthagen, A Z Zellelow, E R Rohwer;
International Symposium on Analytical Science, Analitika 2002, 4 - 10 December
2002, Stellenbosch, South Africa
43.
Poster; Analysis of some South African essential oils with comprehensive twodimensional gas chromaography; A Z Zellelow, W Welthagen, E R Rohwer;
International Symposium on Analytical Science, International Symposium on
Analytical Science, Analitika 2002, 4 - 10 December 2002, Stellenbosch, South
Africa
44.
Poster; The differentiation between localities based on the mineral content of single
cultivar wines; P P Minnaar, E R Rohwer, M Lamont; International Symposium on
Analytical Science, Analitika 2002, 4 - 10 December 2002, Stellenbosch, South
Africa
11
45.
Poster; In-situ derivatization of haloacids in silicone rubber traps; M FernandesWhaley, E R Rohwer; International Symposium on Analytical Science, Analitika
2002, 4 - 10 December 2002, Stellenbosch, South Africa
46.
Poster; Investigating the pre-concentration of Dioxins, PAHs and Chlorophenols in
silicone rubber traps with analysis by GC-MS(NCI); A Whaley, E R Rohwer;
International Symposium on Analytical Science, Analitika 2002, 4 - 10 December
2002, Stellenbosch, South Africa
47.
Keynote lecture; Different concentrating models for the simultaneous analysis of a
wide volatility range of organic compounds in air using multichannel silicone rubber
traps with gas chromatography; E K Harden , E R Rohwer; International Symposium
on Analytical Science, Analitika 2002, 4 - 10 December 2002, Stellenbosch, South
Africa
48.
Keynote lecture; Detection of NO by UV Laser Induced Ionisation and TOF-MS, H G
C Human and E R Rohwer; International Symposium on Analytical Science,
Analitika 2002, 4 - 10 December 2002, Stellenbosch, South Africa
49.
Invited lecture; Optimizing separation in GC x GC and SFC x GC; E Rohwer, W
Welthagen, A Venter; First International Symposium on Comprehensive
Multidimensional Gas Chromatography, 6-7 March 2003, Volendam, The
Netherlands
50.
Poster: Optimization of comprehensive two-dimensional gas chromatography and the
analysis of diesel petroleum fractions; W Welthagen, A Zellelow, E Rohwer; First
International Symposium on Comprehensive Multidimensional Gas Chromatography,
6-7 March 2003, Volendam, The Netherlands
51.
Poster: Instrumentation for comprehensive two-dimensional supercritical fluid and
independent fast-temperature-programmed gas chromatography; A Venter, E Rohwer;
First International Symposium on Comprehensive Multidimensional Gas
Chromatography, 6-7 March 2003, Volendam, The Netherlands
52.
Advisory paper written by workgroup 2 at the >UNEP Workshop to Develop a Global
POPs Monitoring Programme to Support the Effectiveness Evaluation of the
Stockholm Convention=, 24- 27 March 2003, Geneva, Switzerland: Pages 18 - 23 of
the Proceedings: Substances and Analytical Techniques (to be used for the Global
POPs Monitoring Programme); E Rohwer (co-chair), D Muir (co-chair), H K Lee
(Rapporteur), Y Huang, A Konoplev, M Morita, T H Koné, J C Tenorio, O Osibanjo,
R C K Yive, D Graham, B O Nejeri
53.
Poster: Negative Chemical Ionization for the detection of ultra-trace, air-borne
compounds by silicone rubber concentration/desorption and GC-MS; E R Rohwer, A
Whaley, S F van der Walt, B D Debowski; 16th International Mass Spectrometry
Conference, Edinburgh, Great Britain, 31 August - 5 September 2003
12
54.
Plenary lecture: Retention time locking for comparing GC-MS and GCxGC data; E
Rohwer, Y Naudé, N Potgieter, A Z Zellelow, E K Harden and A J Hassett; PL 28;
27th International Symposium on Capillary Chromatography; Riva del Garda, Italy, 31
May - 4 June 2004
55.
Invited lecture: Dioxin monitoring B A developing country perspective; PBC Forbes,
ER Rohwer, EK Harden and A Whaley; Enviromin 2004, International Chemistry
Conference on Environmental and Health Aspects of Mining, Refining and Related
Industries, Kasane, Botswana, 27 June to 1 July 2004.
56.
Rapporteur of Workgroup 3 (Sustainability of POPs Laboratories), at the ARegional
Workshop on Existing Capacity and Capacity Building Needs to Analyse POPs in
Developing Countries@ held by UNEP (United Nations Environment Programme) for
the African Region of the Stockholm Convention, 4-6 October 2005, Pretoria. E
Rohwer responsible for drafting, discussing, amending the consensus document on
Sustainability of POPs Laboratories
57.
Poster presentation: Determining alkylphenols from water by concentration and
derivatization in multichannel PDMS traps; M J Fenandes-Whaley and E R Rohwer;
29th International Symposium on capillary chromatography; (Abstract in CD of the
symposium); Riva del Garda, Italy; 29 May - 2 June 2006.
58.
Poster presentation; A novel screening method for atmospheric PAHs arising from
biomass burning; PBC Forbes, B Dryden-Schofield, Y Naudé and ER Rohwer;
International Conference on Atmospheric Chemistry at the Interfaces; 18-22
September 2006, Cape Town.
60.
Poster presentation: The purity analysis of nitrogen and oxygen at CSIR NML South
Africa; M Janse van Rensburg, A Botha and E Rohwer; NEN and ISO/TC 158 jointly
organised GAS2007 conference in the World Trade Centre in Rotterdam, the
Netherlands, 14-16 February 2007 (poster prize)
61.
Invited lecture: Laser induced fluorescence as a screening method for atmospheric
polycyclic aromatic hydrocarbons; Patricia Forbes and Egmont Rohwer; Optics and
Laser Applications in Medicine and Environmental Monitoring for Sustainable
Development, 19-24 November 2007, Cape Coast, Ghana.
62.
Poster presentation: The olfactory assessment of milk volatiles by a new method of
capturing and releasing gas chromatographic fractions; Y Naude, M Van Aardt, E
Buys, R De Kock and E Rohwer; 32nd International Symposium on Capillary
Chromatography, 26-30 May 2008, Riva del Garda, Italy
63.
Poster presentation: A novel screening method for atmospheric PAHs arising from
biomass burning; PBC Forbes, B Dryden-Schofield, Y Naudé and ER Rohwer,
Atmospheric Chemistry at the Interfaces 2006, 17-22 September 2006, Cape Town.
(Also presented at ChromSAAMS 2008, 12-15 October 2008, Bela Bela).
13
64.
Lecture: Monitoring of trace organic air pollutants a developing country perspective;
P.B.C. Forbes and E.R. Rohwer, Air Pollution 2008, 22-24 September 2008, Skiathos,
Greece. Peer reviewed article in conference proceedings, see list of publications.
65.
Poster presentation: A new method for quantitative determination of free molecular
and particle bound DDT in contaminated indoor air by GC-MS; Y Naudé, R
Bornman, E R Rohwer. 18th International Mass Spectrometry Conference 30 Aug B 4
Sept 2009, Bremen, Germany.
66.
Chairman of session: General Analytics/ Forensic and doping analysis; 18th
International Mass Spectrometry Conference, 30 Aug B 4 Sept 2009, Bremen,
Germany.
67.
Invited lecture: Application of laser induced fluorescence to monitor atmospheric
polycyclic aromatic hydrocarbons; P Forbes and E Rohwer, 18th International
Conference on Air Pollution 2010, Kos, Greece, 21 - 23 June 2010. Full paper in peerreviewed conference proceedings, see list of publications.
New multidimensional chromatographic methods for enantiomeric analysis of opDDT and associated environmental pollutants;Yvette Naudé and Egmont R. Rohwer;
Poster presented at the 34nd International Symposium on Capillary Chromatography,
30 May - 4 June 2010, Riva del Garda, Italy
68.
69.
Symposium oral presentation: The analysis of pinotage wine aromas by a novel
fractionating olfactometric method combined with comprehensive two dimensional
gas chromatography - mass spectrometry; Y Naudé and E Rohwer; IUFoST 2010,
Symposium of the International Union of Food Science and Technology, 22-26
August 2010, Cape Town.
CONTRIBUTIONS AT REGIONAL AND NATIONAL SYMPOSIA
1.
Invited lecture: Headspace analysis using GLC; E.R.Rohwer, V.Pretorius, P.J.Apps
and K.H.Lawson; Analytical Workshop '83, Durban, 1983
2.
Invited lecture: Atmospheric pressure ionization in mass spectrometry E.R.Rohwer;
28th Convention of the South African Chemical Institute, Stellenbosch, 1984
3.
Invited lecture: Introduction to gas chromatography-mass spectrometry E.R.Rohwer;
Symposium on Gas Chromatography-Mass Spectrometry, Pretoria, 1984
4.
Invited lecture: Quantitation and selectivity in mass spectrometry; E.R.Rohwer;
Symposium on Quantitative Mass Spectrometry, Pretoria, 1985
5.
Invited lecture: Present and future trends in capillary column technology for GC;
E.R.Rohwer; National Conference on Chromatography, Durban, 1986
14
6.
Invited lecture: Mass analysers for mass spectrometry; E.R.Rohwer; Symposium on
Gas Chromatography - Mass Spectrometry, Pretoria, 1987
7.
Invited lecture: New trends in combined chromatography/mass spectrometry
techniques; E.R.Rohwer; 40th Convention of the South African Chemical Institute,
Johannesburg, January 1989.
8.
Invited lecture: SFC en SFC-MS vir die bepaling van plaagdoders; (SFC and
SFC-MS for the determination of pesticides) E.R.Rohwer; One-day
symposium of the working group for pesticide analysis, Pretoria, April 1989.
9.
Invited lecture: Laser spectroscopy of molecules by multiphoton ionization;
E.R.Rohwer; Carman Symposium on Laser Technology and Spectroscopy, Pretoria, 9
November 1989.
10.
Poster presentation: GC profiele van vlugtige verbindings afkomstig van akasia
blomme vir chemotaksonomie (GC profiles of volatile compounds from acacia
flowers for chemotaxonomy); M.E.C.Erasmus, V.Pretorius, E.R.Rohwer en
P.J.Robbertse; Analytica '90 - First National Symposium on Analytical Science,
Pretoria, 19-23 March 1990
11.
Poster presentation: Easy conversion of packed column GC for capillary work;
Z.Apostolides, M.Barendse and E.Rohwer; Analytica '90 - First National Symposium
on Analytical Science, Pretoria, 19-23 March 1990
12.
Poster presentation: Die daarstelling van 'n SFC-apparaat gebaseer op 'n Varian 8500
vloeistofpomp (The manufacture of a SFC instrument based on a Varian 8500 liquid
pump); H.W.Viljoen and E.R.Rohwer; Analytica '90 - First National Symposium on
Analytical Science, Pretoria, 19-23 March 1990
13.
Invited lecture: New developments in time-of-flight mass spectrometry; E.R.Rohwer;
Analytical Forum '90, High Performance Systems, Johannesburg, 28 August 1990
14.
Invited lecture: Carrier gases in gas chromatography and purity considerations;
E.R.Rohwer; Fedgas/ChromSA Gas Chromatography Seminar, Johannesburg, 20 June
1991
15.
Invited lecture: Advances in chromatography and mass spectrometry pertaining to
biochemical analysis; E.R.Rohwer; Analytica/SACI Symposium on Advances in
Modern Analytical Techniques, Pretoria, 3 July 1991
16.
Invited lecture: Vlugtydmassaspektrometrie (Time-of-flight mass spectrometry);
H.G.C.Human and E.R.Rohwer; 36th Annual Conference of the South African
Institute for Physics, Bloemfontein, R.S.A., July 1991
17.
Invited lecture: Toepassings van vlugtydmassaspektrometrie (Applications of time-of15
flight mass spectrometry); H.G.C.Human and E.R.Rohwer; 36th Annual Conference
of the South African Institute for Physics, Bloemfontein, R.S.A., July 1991
18.
Invited lecture: Ontwikkeling van metodes vir die analise van spore onsuiwerhede in
lug en water (Development of methods for the analysis of trace impurities in air and
water); E.R.Rohwer; Simposium oor omgewingsnavorsing, -bewaring en -bestuur
(Symposium on environmental research, - protection, and - management), University
of Pretoria, 31 October 1991
19.
Invited lecture: Nuwe tegnieke vir die vervaardiging en analise van materiale met
behulp van lasers (New techniques for the manufacture and analysis of materials with
lasers); E.R.Rohwer; Simposium oor Materiaalnavorsing aan die Universiteit van
Pretoria, University of Pretoria, 14 November 1991
20.
Poster presentation: Detection of explosives by ion mobility spectrometry; P.R.Nel
and E.R.Rohwer; National symposium, Chromatography : Mass Spectrometry '92,
Warmbad, 3-6 May 1992
21.
Poster presentation: Analysis of the essential oil of a Pellargonium cultivar by gas
chromatography - mass spectrometry; M.E.C.Erasmus, A.J.Hassett and E.R.Rohwer;
National symposium, Chromatography : Mass Spectrometry '92, Warmbad, 3-6 May
1992
22.
Poster presentation: The construction and evaluation of an oxygen specific detector
for capillary gas chromatography; W.J.Havenga and E.R.Rohwer; National
symposium, Chromatography : Mass Spectrometry '92, Warmbad, 3-6 May 1992
23.
Poster presentation: Application of GC and GC-MS to the analysis of coal extracts;
B.D.Debowski, M.E.C.Erasmus, A.J.Hassett, D.L.Morgan and E.R.Rohwer; National
symposium, Chromatography : Mass Spectrometry '92, Warmbad, 3-6 May 1992
24.
Invited lecture: Extraction of pollutants in water with special reference to solid phase
techniques; A.J.Hassett and E.R.Rohwer; Working Group for Pesticide Analysis
Symposium 1993, Onderstepoort, South Africa, 22 April 1993
25.
Invited lecture: Matrix-assisted laser desorption time-of-flight mass spectrometry of
high mass proteins; H.J.Strydom, C.R.Green and E.R.Rohwer; 38th Annual
Conference of the South African Institute for Physics, 7-9 July 1993, Stellenbosch,
South Africa
26.
Poster presentation at the " 33rd SACI Convention", 28 Jan - 2 Feb 1996, Cape
Town; Trace Analysis of Organic Water Pollutants using the Multichannel Silicone
Rubber Trap with Capillary Gas Chromatography; E.K.Ortner, A.J.Hassett and
E.R.Rohwer
27.
Poster presentation at the " 33rd SACI Convention", 28 Jan - 2 Feb 1996, Cape
Town; A Comparative Study of Taste and Odour analysis by GC-MS Using a
16
Multichannel Silicone Rubber Trap and Closed Loop Stripping Isolation Techniques;
A.J.Hassett, E.Ortner and E.R.Rohwer
28.
Oral presentation at the "Deutsche Physikalische Gesellschaft - Frühjahrstagung" in
Rostock, Germany, 18 - 21 March 1996. Einlaßtechniken für
Lasermassenspektrometer (LAMS); H.J. Heger, R. Zimmermann, E.R.Rohwer und
U.Boesl; Verhandlungen der Deutschen Physikalischen Gesellschaft, ISSN
0420-0195, page 689
29.
Poster and extended abstract presented at the "29. Diskussionstagung der
Arbeitsgemeinschaft Massenspektrometrie - AGMS'96" , 28 - 31 May 1996,
Universität Bremen, Germany; Entwicklung einer dreidimensionalen
spurenanalytischen Methode: Kopplung von Gaschromatographie mit
isomerenseletiver Jet-REMPI-Massenspektrometrie, R.Zimmermann, H.J.Heger,
A.Kettrup, D.Lenoir, K.-W.Schramm, E.R.Rohwer, U.Boesl.
30.
Poster presentation at the AMass Spectrometry/Chromatography 1996" National
Symposium, 25-29 August 1996, Vaal Spa, Christiana; Quantitative Analysis of
Compound Classes in Petrochemical Samples by Supercritical Fluid Chromatography;
A.Venter, M.Probst, A.E.Laubscher, E.R.Rohwer
31.
Poster presentation at the AMass Spectrometry/Chromatography 1996" National
Symposium, 25-29 August 1996, Vaal Spa, Christiana; Isolation of Trace Organic
Compounds from Environmental Samples for Gas Chromatographic Analysis using
the Multichannel Silicone Rubber Trap; E.K.Ortner, A.J.Hassett, E.R.Rohwer (best
poster prize)
32.
Poster presentation at the AMass Spectrometry/Chromatography 1996" National
Symposium, 25-29 August 1996, Vaal Spa, Christiana; Isolating Tastes and Odours
for GC-MS Analysis using a Multichannel Silicone Rubber Trap and Grob Closedloop Stripping; A.J.Hassett, E.K.Ortner, E.R.Rohwer
33.
Invited lecture at the One Day Course >Chemical Analysis: Pride and Prejudice=
presented by the South African Chemical Engineers and the South African Chemical
Institute, 12 February 1998, Vaal Triangle Technikon; Gas Chromatography strengths; E R Rohwer
34.
Invited lecture at the One Day Course >Chemical Analysis: Pride and Prejudice=
presented by the South African Chemical Engineers and the South African Chemical
Institute, 12 February 1998, Vaal Triangle Technikon; Gas Chromatography limitations and challenges; E R Rohwer
35.
Paper presented (Course manual pp 1-12) at the One Day Course >Chemical Analysis:
Pride and Prejudice= presented by the South African Chemical Engineers and the
South African Chemical Institute, 12 February 1998, Vaal Triangle Technikon; Gas
Chromatography - an overview for laymen, managers or other end-users of analytical
data; E R Rohwer
17
36.
Lecture at the MPAQASA Symposium 1998, 13 - 14 August 1998, CSIR, Pretoria;
Comparing preconcentration techniques for the gas chromatographic analysis of
organic water pollutants; E K Ortner and E R Rohwer
37.
Lecture at the Analitika=98 Conference (refereed abstract found in Proceedings, ISBN
1-874832-91-9, published by the South African Institute of mining and Metallurgy),
12 - 14 October 1998, Midrand, South Africa; The Determination of Taste and Odour
Compounds, found in Water, using a Multi-channel Silicone Rubber Trap and GCMS Analysis; A J Hassett and E R Rohwer
38.
Poster at the Analitika=98 Conference (refereed abstract found in Proceedings, ISBN
1-874832-91-9, published by the South African Institute of mining and Metallurgy),
12 - 14 October 1998, Midrand, South Africa; Monitoring amines in industrial air; A
C Botha and E R Rohwer
39.
Poster at the Analitika=98 Conference (refereed abstract found in Proceedings, ISBN
1-874832-91-9, published by the South African Institute of mining and Metallurgy),
12 - 14 October 1998, Midrand, South Africa; A Study of the Extraction Efficiency
and Recovery of Organic Water Pollutants with the Mulitchannel Silicone Rubber
Trap; E K Ortner and E R Rohwer
40.
Poster at the Analitika=98 Conference (refereed abstract found in Proceedings, ISBN
1-874832-91-9, published by the South African Institute of mining and Metallurgy),
12 - 14 October 1998, Midrand, South Africa; Increasing the Selectivity of GC
Stationary Phases by Gas Phase Introduction of Low-volatility Modifiers; G-C Chen
and E R Rohwer
41.
Poster at the Analitika=98 Conference (refereed abstract found in Proceedings, ISBN
1-874832-91-9, published by the South African Institute of mining and Metallurgy),
12 - 14 October 1998, Midrand, South Africa; Supercritical fluid chromatography of
petrochemical mixtures; A Venter, E R Rohwer and A E Laubscher
42.
Poster at the Analitika=98 Conference (refereed abstract found in Proceedings, ISBN
1-874832-91-9, published by the South African Institute of mining and Metallurgy),
12 - 14 October 1998, Midrand, South Africa; Increasing the polarity of PEG
stationary phase in GC by continuous introduction of water vapour; G-C Chen and E
R Rohwer
43.
Poster at the Analitika=98 Conference (refereed abstract found in Proceedings, ISBN
1-874832-91-9, published by the South African Institute of mining and Metallurgy),
12 - 14 October 1998, Midrand, South Africa; Detection of traces of TNT in air by
GC-ECD; B D Debowski, S J van der Walt and E R Rohwer
44.
Poster at the Analitika=98 Conference (refereed abstract found in Proceedings, ISBN
1-874832-91-9, published by the South African Institute of mining and Metallurgy),
12 - 14 October 1998, Midrand, South Africa; Gas Chromatography - Laser Mass
18
Spectrometry: In-line Derivitization Technique for Selective Detection of Chlorinated
Aromatics; R Zimmermann, H J Heger and E R Rohwer
45.
Poster at the 63rd Physikertagung, Deutsche Physikalische Gesellschaft, Heidelberg,
Germany, 15-19 March 1999; Probenahme und Einlaßsysteme für die OnlineMassenspektrometrie (Sampling and inlet systems for on-line Mass Spectrometry) ; R
Dorfner, K Hafner, R Zimmermann, H J Heger, F Mühlberger, E Rohwer, A Kettrup
and U Boesl
46.
Invited lecture at the one day ICP-MS Seminar organized by SASS, SAAMS and the
Chemistry Department of the Technikon Witwatersrand, 27 May 1999, Johannesburg,
South Africa; Principles of Mass Spectrometry; E R Rohwer
47.
Invited lecture at the one day seminar at the University of Stellenbosch: The
Occurrence and Analysis of PCBs and Dioxins: A World-wide Issue, 23 November
1999, Stellenbosch, South Africa; Dioxins and PCBs: What is the situation in South
Africa?, E R Rohwer
48.
Invited lecture at the Chromatography Mass Spectrometry 2000 Symposium, 16-18
October 2000, Warmbaths: Silicone rubber concentrating devices for Gas
Chromatography; E R Rohwer
49.
Lecture at the Chromatography Mass Spectrometry 2000 Symposium, 16-18 October
2000, Warmbaths: Detecting landmines by vapour detection; B D Debowski, S J van
der Walt, E R Rohwer
50.
Lecture at the Chromatography Mass Spectrometry 2000 Symposium, 16-18 October
2000, Warmbaths: Advanced chemical fingerprinting of polluted water samples using
SPME-GC/MS; W J Havenga and E R Rohwer
51.
Poster at the Chromatography Mass Spectrometry 2000 Symposium, 16-18 October
2000, Warmbaths: In-situ derivitization on multichannel silicone rubber traps; M J
Fernandes and E R Rohwer
52.
Poster at the Chromatography Mass Spectrometry 2000 Symposium, 16-18 October
2000, Warmbaths: Group separation of various oxygenates with sub-critical CO 2
using a silica gel PLOT column; A Venter, A E Laubscher and E R Rohwer
53.
Poster at the Chromatography Mass Spectrometry 2000 Symposium, 16-18 October
2000, Warmbaths: The multichannel silicone rubber trap used for the analysis of
volatile organics in water; A J Hassett and E R Rohwer
54.
Invited lecture at the Symposium New Horizons in Analytical Chemistry, organised by
the Analytical Division of SACI, 20 July 2000, Pretoria; Coupling high resolution UV
Spectroscopy with Mass Spectrometry, E R Rohwer
55.
Panelist at the SAAMS & ChromSA organised meeting; Problem solving: Questions
19
and Examples in Chromatographic and MS applications, E Rohwer, P Apps, M
Roseman, S de Kock, Sandton, 23 Aug 2001
56.
Lecture at 47th Annual Conference of the SA Institute for Physics; Nitrogen Monoxide
detection by UV laser ionization and Time-of-Flight Mass Spectrometry, HGC
Human and ER Rohwer, 25 - 27 September 2002, University of Potchefstroom,
Potchefstroom.
57.
Lecture at the Short Course on Environmental Analysis in Stellenbosch; Time-ofFlight Mass Spectrometry and Chromatography; E R Rohwer, 11 December 2002,
University of Stellenbosch, Stellenbosch
58.
Lecture at 1st annual Bio/Chemtek Science and Technology Conference 2003,
Pretoria,15 August 2003; The Analysis Of Essential Oils Using Comprehensive
Coupled Chromatographic Techniques, EK Harden, ER Rohwer, AZ Zellelow, PR
Makgwane, A Venter, AJ Hassett
59.
Chairman of Chromatography/Mass Spectrometry session: E Rohwer, 6 July 2004;
The 37th National Convention of SACI, CSIR International Convention Centre,
Pretoria, 4-9 July 2004.
60.
Lecture at The 37th National Convention of SACI, CSIR International Convention
Centre, Pretoria, 4-9 July 2004; The use of the comprehensively coupled
chromatographic techniques GCxGC and SFCxGC for the analysis of essential oils; E
Rohwer, P Makgwane, A Venter, E Harden, A Zellelow, N Potgieter and Y Naudé
61.
Poster at The 37th National Convention of SACI, CSIR International Convention
Centre, Pretoria, 4-9 July 2004; Polydimethylsiloxane as Concentration and Reaction
Medium for Gas Chromatographic Analysis of Air Pollutants; M Fernandes-Whaley
and E Rohwer.
62.
Poster at The 37th National Convention of SACI, CSIR International Convention
Centre, Pretoria, 4-9 July 2004; The Use of Comprehensively Coupled Supercritical
Fluid and Gas Chromatography (SFCxGC) for Lemon Grass Essential Oil
Fingerprinting; P Makgwane, A Venter and E Rohwer
63.
Poster at The 37th National Convention of SACI, CSIR International Convention
Centre, Pretoria, 4-9 July 2004; Beer Aroma Profiling by Purge-and-Trap GC
Analysis, using the Multichannel Silicone Rubber Trap; N Potgieter and E Rohwer
64.
Poster at The 37th National Convention of SACI, CSIR International Convention
Centre, Pretoria, 4-9 July 2004; Negative Chemical Ionization for the Detection of
Ultra-Trace, Air-Borne Compounds by Silicone Rubber Concentration/Desorption and
GC-MS; A Whaley, SJ van der Walt, ER Rohwer and BD Debowski
65.
Chairman, scientific programme committee, session chairman of the symposium;
Chromatography Mass Spectrometry 2004; Buffelspoort, Rustenburg, South Africa,
20
17-20 October 2004
66.
Lecture at the symposium Chromatography Mass Spectrometry 2004; Buffelspoort,
Rustenburg, South Africa, 17-20 October 2004; The Analysis of Beer Aroma by
Modern Gas Chromatographic Techniques; E Rohwer, N Potgieter, E Harden, Y
Naudé
67.
Award winning poster at the symposium Chromatography Mass Spectrometry 2004;
Buffelspoort, Rustenburg, South Africa, 17-20 October 2004; Concentration and
derivatization of trace level endocrine disruptors in water for analysis by gas
chromatography-mass spectrometry; M Fernandes-Whaley and E R Rohwer (best
poster prize)
68.
Poster at the symposium Chromatography Mass Spectrometry 2004; Buffelspoort,
Rustenburg, South Africa, 17-20 October 2004; Beer aroma profiling by purge-andtrap GC analysis using the multichannel silicone rubber trap; N Potgieter, E Harden
and E Rohwer
69.
Poster at the symposium Chromatography Mass Spectrometry 2004; Buffelspoort,
Rustenburg, South Africa, 17-20 October 2004; GC-MS with negative chemical
ionisation for the detection of persistent organic pollutants using silicone rubber
concentrators; AES Whaley and ER Rohwer
70.
Invited lecture at the one-day conference, A The Greener side of Pulp and Paper@, 21
April 2005, Sappi Technology Centre, The Innovation Hub, Pretoria as part of the
TAPPSA Northern Region Conference Program. Title: Detection of POPs (Persistent
Organic Pollutants) in Outdoor Air; A Whaley and E Rohwer
71.
Member of the organising committee, Chairman of sessions, Analitika Conference
2006, 10 -13 September 2006, Kwa Maritane, Pilansberg, South Africa.
72.
Lecture; Concentration and derivatiztion in silicone rubber traps for trace analysis of
air and water pollutants ; M Fernandes-Whaley, E Rohwer, F Muhlberger, A Whaley,
T Adam and R Zimmermann; Proceedings p 4, MTS 9; Analitika Conference 2006,
10 -13 September 2006, Kwa Maritane, Pilansberg, South Africa.
73.
Poster presentation; A novel technique for the analysis of atmospheric polycyclic
aromatic hydrocarbons; PBC Forbes, E Harden, Y Naudé and ER Rohwer;
Proceedings p 23, poster P8; Analitika Conference 2006, 10 -13 September 2006,
Kwa Maritane, Pilansberg, South Africa.
74.
Poster presentation; A new method for olfactory assessment of gas chromatographic
aroma profiles; M Lim Ah Tock, ER Rohwer and Y Naudé; Proceedings p23, poster
P16, Analitika Conference 2006, 10 -13 September 2006, Kwa Maritane, Pilansberg,
South Africa. (best poster prize)
75.
Poster presentation; A new liquid chromatographic method for the identification of
21
tuberculosis and other mycobacterium species; VR Schillack and ER Rohwer;
Proceedings p24, poster P29; Analitika Conference 2006, 10 -13 September 2006,
Kwa Maritane, Pilansberg, South Africa.
76.
Poster presentation; Interesting trends in persistent organic pollutants detection; A
Whaley and ER Rohwer; Proceedings p24, poster P39; Analitika Conference 2006, 10
-13 September 2006, Kwa Maritane, Pilansberg, South Africa.
77.
Production of methoxypyrazine flavours by Mycelial fungi from South Africa; A.B.
Mahomed Ali, G.J. Marais, E.R. Rohwer and Y. Naudé. Poster presentation at the
Southern African Society for Plant Pathology's 45th Conference (SASPP),
Johannesburg, South Africa, January 2007
78.
Lecture; A novel screening method for atmospheric polycyclic aromatic
hydrocarbons; P Forbes and E Rohwer; National Association for Clean Air
Conference, 10-12 October 2007, Drakensberg.
79.
Participation: Energy Summit - Energy Security for sustainable & shared economic
growth for all; Attended by E Rohwer as University of Pretoria representative:
Department of Minerals and Energy, Sandton International Convention Centre, 25 27 Sept 2007.
80.
Production of methoxypyrazines by Penicillium purpurogenum and Penicillium
rubrum. A.B. Mahomed Ali, G.J. Marais, E.R. Rohwer and Y. Naudé; Poster
presented at Bio-08 Combined Conference. (Bio-08 is the combination of the
SASBMB Congress, Biotech SA Conference and SASM Congress), Grahamstown,
January 21 - 25, 2008.
81.
Poster presentation: A novel denuder for trace organic air pollutant monitoring; PBC
Forbes, A Trüe and ER Rohwer; ChromSAAMS 2008, 12-15 October 2008, Bela
Bela, South Africa
82.
Member of organising committee and session chair: ChromSAAMS 2008, 12-15
October 2008, Forever Resorts, Warmbaths, Bela Bela, South Africa
83.
Poster presentation: Identification of semiochemical compounds from Eucalyptus
detected by Gonipterus scutellatus, using GC-FID-electroantennography and GC-MS;
M Bouwer, R Nadel, B Slippers, MJ Wingfield, Y Naude and E Rohwer;
ChromSAAMS 2008, 12-15 October 2008, Bela Bela, South Africa
84.
Poster presentation: A new sampling method for the detection of DDT in
contaminated indoor air and dust; Y Naude and E Rohwer; ChromSAAMS 2008, 1215 October 2008, Bela Bela, South Africa
85.
Poster presentation: The olfactory assessment of milk volatiles by a new method of
capturing and releasing gas chromatographic fractions; Y Naude, M Van Aardt, E
Buys, R De Kock and E Rohwer; ChromSAAMS 2008, 12-15 October 2008, Bela
22
86.
Bela, South Africa
Poster presentation: The analysis of biodiesel with coprehensively coupled
supercritical fluid and gas chromatogaphy (SFCxGC); D Malan, S Van der Walt and
E Rohwer; ChromSAAMS 2008, 12-15 October 2008, Bela Bela, South Africa
87.
Poster presentation: Comparing the Jacobsen (salen) CoIII catalyst and the potato
epoxide hydrolase enzyme for hydrolytic kinetic resolution of styrene oxides; L.C.
Stander, C. Simpson, D. Brady, E. R. Rohwer; SACI-GDCh Bi-national Organic
Chemistry Conference, 14-19 September 2008, Berg-en-Dal, Kruger National Park,
South Africa
88.
Invitation to give a keynote lecture at the Analitika 2010 symposium 5-9 December
2010, Stellenbosch.
OTHER INVITED RESEARCH LECTURES
1.
Combining mass spectrometry and chromatography: New challenges; E.R.Rohwer;
Institut für physikalische und teoretische Chemie, Tech. Univ. München, Germany, 19
May 1988.
2.
Der Lösemitteleffekt: ein neues Verfahren zur "Headspace" Analyse in der
Chromatographie; E.R.Rohwer; Institut für Lebensmitteltechnologie, Tech. Univ.
München, Germany, 14 July 1988.
3.
Neue Möglichkeiten im Bereich der Chromatographie - Massenspektrometrie;
E.R.Rohwer; Institut für organische Chemie, Univ. Bayreuth, Germany, 26 July 1988.
4.
Die Analyse von Aromastoffen mit dem dynamischen Lösemittel-effekt als
Einlass-system für die Gaschromatographie; E.R.Rohwer; Institut für
Lebensmittelchemie, Tech. Univ. München, 11 Aug. 1988.
5.
Techniques for linking liquid chromatography with mass spectrometry; E.R.Rohwer;
ChromSA seminar, Beckman Instruments, Halfway House, 27 September 1990
6.
Monitoring Organic Pollutants in Incinerator Emmission: New Methods based on Gas
Chromatography; E.R.Rohwer; ChromSA seminar at Merck, Midrand, 20 Feb.1997
7.
New Approaches to Dioxin Analysis; E.R.Rohwer; Invited lecture at the Research and
Development Division of the AECI, Modderfontein, 7 March 1997
8.
Affordable Pollution Control Measures: A Challenge to Analytical Scientists;
E.R.Rohwer; Invited lecture at the Research and Development Division of ISCOR,
Pretoria, 25 March 1997
9.
Time-of-Flight (TOF) mass spectrometry as a detector for comprehensive twodimensional gas chromatography (GCxGC); E Rohwer, Invited lecture at SASTECH,
Sasolburg, 29 January 1998
23
10.
Die gebruik van gepulseerde lasers in die Massaspektrometrie en die
Isotoopskeidingsbedryf, (The use of pulsed lasers in Mass Spectrometry and in Isotope
Separation), Department of Chemistry, University of Stellenbosch, Stellenbosch, 11
August 1998
11.
Multichannel silicone rubber traps: Trace analysis of explosives in air as an
application, E R Rohwer, Invited lecture at BASF, Ludwigshafen (Germany), 4
October 2001
12.
Trace analysis with silicone rubber absorption traps, thermal desorption and GC-MS,
E R Rohwer, Invited lecture at the Institute for Ecological Chemistry, GSF (German
federal research centre for health and the environment), Munich, 24 October 2001
13
Recent developments in chromatography; E R Rohwer, invited lecture to the
analytical section of Bio/Chemtek, CSIR, Modderfontein, 17 July 2002
14
Comprehensive multidimensional techniques in chromatography and mass
spectrometry for the analysis of complex mixtures of organic compounds; E R
Rohwer, Dep of Chemistry seminar, University of the Witwatersrand, 2 October 2002;
lecture repeated at Dep of Chemistry seminar series, University of Pretoria, 4 October
2002
15
GCxGC and GCxGC-TOFMS for essential oil analysis; invited lecture by E R
Rohwer, A Zellelow and E Harden, at the LECO SA seminar on GCxGC-TOFMS
held at the CSIR, Pretoria on 21 August 2003.
16
Comparison of the comprehensively coupled chromatographic techniques: GCxGC
and SFCxGC; invited lecture by E Rohwer at the Bavarian Institute for Applied
Environmental Research and Technology (BIfA), Department of Environmental and
Process Chemistry, Augsburg, Germany, 11 September 2003
17
The development of a multi-purpose silicone rubber trapping device for improved
trace organic analysis in a Chromatography and Mass Spectrometry laboratory;
Invited lecture by E Rohwer , Y Naudé, P Forbes and M Fernandes-Whaley, at the
Institut für Chemie, University Rostock, Germany, 8 June 2010
CAREER-GUIDANCE AND MOTIVATIONAL ACTIVITIES
1
Careers in Chemistry; E R Rohwer, Invited lecture to the University of Pretoria
Foundation Year (UPFY) students with underprepared backgrounds, 28 February
2002
2
Chemists and Chemistry; E R Rohwer; motivational lecture at the undergraduate
prize-giving ceremony of the Department of Chemistry, Univ Pretoria, 23 October
2002
24
3
Careers in Chemistry; E R Rohwer, Invited lecture to the University of Pretoria
Foundation Year (UPFY) students with underprepared backgrounds, 15 May 2003
4
Co-ordinating a Day with Chemistry, 24 June 2003, as part of the winter school for
grade 10 pupils under the auspices of the University of Pretoria AUP with Science@Russels group with introductory lecture AWhy Chemistry ?@ by E R Rohwer and 4
practical demonstrations by post-graduate students A Whaley, M Fernandes, W
Barnard and N Potgieter.
5
Chemistry - the central science; E R Rohwer; Introductory lecture at the Day with
Chemistry, 28 June 2004 ( as part of the winter school for grade 10 pupils under the
auspices of the University of Pretoria AUP with Science@- Russels group)
6
Networking as a vehicle for research advancement; E R Rohwer; Invited lecture to the
AEducation network cluster Workshop@ for NRF researchers in education at the
National Research Foundation (NRF), Pretoria on 24 August 2004
7
Chemistry - the central science; E R Rohwer; Introductory lecture at the Day with
Chemistry, 28 June 2005 ( as part of the winter school for grade 10 pupils under the
auspices of the University of Pretoria AUP with Science@ project ).
8
Careers in Chemistry; E R Rohwer, Invited lecture to the University of Pretoria
Foundation Year (UPFY) students with underprepared backgrounds, 15 September
2005
9
The Challenge of Chemistry; E R Rohwer, Introductory lecture at the Day with
Chemistry, 27 June 2006 ( as part of the winter school for grade 10 pupils under the
auspices of the University of Pretoria AUP with Science@ project ).
10
Careers in Chemistry; E R Rohwer, Invited lecture to the University of Pretoria
Foundation Year (UPFY) students with underprepared backgrounds, 17 August 2006
11
The Challenge of Chemistry; E R Rohwer, Introductory lecture at the Day with
Chemistry, 26 June 2007 ( as part of the winter school for grade 10 pupils under the
auspices of the University of Pretoria AUP with Science@ project ).
12
Careers in Chemistry; E R Rohwer, Invited lecture to the University of Pretoria
Foundation Year (UPFY) students with underprepared backgrounds, 2 August 2007
PATENTS
1
Verfahren zum Nachweis von Substanzen und Substanzklassen, (Method for the
determination of compounds and compound classes), German Patent DE 19754161A1
issued on 26 August 1999; R Zimmermann, E R Rohwer, H J Heger, U Boesl, A
Kettrup
25
2
Verfahren und Vorrichtung zur Erzeugung eines gerichteten Gasstrahls (Method and
device for the generation of a directed gas jet), German Patent granted 10 Nov 2005,
DE 19822672 ( PLA 9839); E R Rohwer, R Zimmermann, H J Heger, R Dorfner, U
Boesl, A Kettrup
US Patent, same authors: AMethods and device for producing a directed gas jet@:
Patent number: US 6,390,115 B1 of May 21, 2002.
3
Gaseinlaß für eine Ionquelle (Gas inlet for an ion source), German patent (1998) DE
19822674.8 (PLA 9838) pending; R Zimmermann, E R Rohwer, H J Heger, U Boesl,
A Kettrup
4
Gaseinlaß zur Erzeugung eines gerichteten und gekühlten Gasstrahls, (Gas inlet for
the generation of a directed and cooled gas jet), German patent DE 19913451.0
submitted on 25 March 1999, pending; R Zimmermann, E R Rohwer, R Dorfner, U
Boesl, A Kettrup. Same authors, US patent no: US 6,772,649 B2, August 10, 2004:
Gas inlet for producing a directional and cooled gas jet.
5
Kapillarventil und Verfahren zu seiner Herstellung (Capillary valve and method of
construction) ; German patent DE 10014962.6 submitted on 25 March 2000; E R
Rohwer, R Zimmermann, R Dorfner, A Kettrup
6
Chemical Analysis of Samples, SA provisional patent application number ZA
2002/3002, lodging date 16 April 2002, E R Rohwer and A Venter (New
instrumentation for comprehensive SFCxGC). Allowed to lapse in 2004.
7
A method of fractionating a mixture, SA provisional patent application ZA
2006/07538; ER Rohwer, MJ Lim Ah Tock, Y Naudé; filed 08 Sep 2006;
8
A method of detecting an analyte, SA provisional patent application ZA 2006/07539 ;
ER Rohwer, PBC Forbes and Y Naudé; filed on 8 Sep 2006
9
A method of analysing a gas sample, SA provisional patent application ZA
2006/07760; ER Rohwer, B Dryden-Schofield, PBC Forbes, Y Naudé; filed on 15 Sep
2006
THESES COMPLETED UNDER SUPERVISION OF E ROHWER
MSc theses:
Bodamp-gaschromatografie met die dinamiese oplosmiddeleffekinlaat: Toepassing in die
chemotaksonomie van Acacia; M E C Erasmus, University of Pretoria, October 1990
The preparation and storage of ultra high purity hexane for solvent effect gas
chromatographic analysis; G-C Chen; University of Pretoria, October 1992
26
The quantitative mass spectrometric determination of trace impurities in uranium
hexafluoride using relative response factors; M Sowden; University of Pretoria, October 1993
Alternative Concentration Techniques for the Trace Analysis of Semi-Volatile Organic Air
Pollutants by Capillary Gas Chromatography; E K Ortner; University of Pretoria, 1994 (cum
laude)
Supercritical fluid chromatography combined with GC and GC-MS for the analysis of
complex petrochemical mixtures; A Venter; University of Pretoria, March 1998
The determination of arsenic in soil by ICP-OES; A E S Whaley; University of Pretoria,
October 1999
Analysis of volatile organic compounds in water by sorptive extraction and gas
chromatography - mass spectrometry; A J Hassett; University of Pretoria, June 2001
Concentration and derivatisation in silicone rubber traps for gas chromatographic trace
analysis of aldehydes; M J Fernandes; University of Pretoria, July 2001
The analysis of some South African essential oils by comprehensive two-dimensional gas
chromatography (GCxGC); A Z Zellelow; University of Pretoria, July 2003
Analysis of cobalt, tantalum, titanium, vanadium and chromium in tungsten carbide by
inductively coupled plasma - optical emission spectrometry; M Archer; University of
Pretoria, March 2004
Gas chromatography coupled with ion trap mass spectrometry (GC-MS and GC-MS-MS) for
arson debris analysis; B-J de Vos; University of Pretoria, February 2005 (cum laude)
The optimisation of GC x GC and the analysis of diesel petrochemical samples; W
Welthagen; University of Pretoria, April 2005
The forensic analysis of illicit methaqualone-containing preparations by gas chromatography
and mass spectrometry; A A Grové; University of Pretoria, December 2005
Characterization of essential oils by comprehensively coupled supercritical fluid and gas
chromatography (SFCxGC); P. R. Makgwane, March 2006
Analysis of beer aroma using purge-and-trap sampling and gas chromatography; N Potgieter,
University of Pretoria, Oct 2006 (cum laude)
A new liquid chromatographic method for the identification of tuberculosis and other
mycobacterium species; V Schillack, University of Pretoria, Oct 2006 (cum laude)
Analysis of trace amounts of oxygen, carbon monoxide and carbon dioxide in nitrogen using
gas chromatography; M Janse van Rensburg, University of Pretoria, April 2007 (cum laude)
27
The use of high performance liquid chromatography for the analysis of medicinal plants; T M
Boloko (Co-supervisor Dr Vinesh Maharaj, CSIR). University of Pretoria, April 2008.
Analysis of the mandibular pheromone of living honeybee queens using non-destructive
sampling techniques; MM Masemane (co-supervisors: Prof R Crewe and Dr TC Wossler),
University of Pretoria, 2009
Aroma analysis of alcoholic beverages using multi-channel silicone rubber traps; M J Lim Ah
Tock; (Co-supervisors, Ms Patricia Forbes, Dr Sandra Combrinck) MTech thesis for Tshwane
University of Technology, Tshwane University of Technology, 2009
Multi-element analysis of South African wines by ICP-AES and their classification according
to geographical origin; P P Minnaar; (co-supervisor Dr O P H Augustyn), February 2009
Identification of volatile organic compounds from Eucalyptus detected by Gonipterus
scutellatus (Gyllenhal) females; M C Bouwer; (co-supervisors Prof M Wingfield and Prof B
Slippers, FABI) September 2010
Production of pyrazine flavours by mycelial fungi; A B Mahomed-Ali; (supervisor Prof GJ
Marais, FABI, University Pretoria, co-supervisor E Rohwer); September 2010
PhD theses:
Using Antipyrine, Debrisoquine, Metoprolol and Sparteine as probe drugs of Cytochrome P450 polymorphism; J Moncrieff; University of Pretoria, October 1993; (Promotor: Prof DeK
Sommers, Faculty of Medicine; co-promotor: E R Rohwer)
Gas chromatographic trace analysis of sulphur compounds: Industrial applications; J B
Laurens; University of Pretoria, Jan 1997
The dynamic modification of gas chromatographic stationary phases by vapours; G-C Chen;
University of Pretoria, October 1998
The photochemistry of uranium hexafluoride as applied to laser isotope separation; E
Ronander; University of Pretoria, Dec 1998
Analysis of aqueous samples with the multichannel silicone rubber trap and capillary gas
chromatography; E K Ortner; University of Pretoria, September 1999
Characterisation of environmental pollution by GC-MS analysis of polycyclic aromatic
compounds in water and soil; W J Havenga; University of Pretoria, October 2000
Comprehensive two-dimensional supercritical fluid and gas chromatography (SFCxGC); A
Venter; University of Pretoria, Jan 2003
Concentration and derivatization in silicone rubber traps for mass spectrometric and gas
chromatographic analysis of air and water pollutants; M J Fernandes-Whaley; University of
28
Pretoria, April 2008
Development of a laser induced fluorescence technique for the analysis of organic air
pollutants; PBC Forbes, University of Pretoria, February 2010
The quantitative characterisation of geological reference materials by isotope dilution
inductively coupled plasma mass spectrometry (ICP-MS), Angelique Botha, September 2010.
29