GEOLOGIAN TUTKIMUSKESKUS
APPENDIX B2
5.10.2015
1 (2)
Reg No E/336/251/2015
ELEMENTS TO BE DETERMINED FROM GEOCHEMICAL BASELINE SAMPLES AFTER
AQUA REGIA EXTRACTION
The following requirements are defined for mineral soil and sediment samples used for geochemical baseline
studies and geochemical mapping from non-contaminated soils. The samples are taken from minerogenic soils,
sediments or from soil dust. The samples may contain small amount of organic material. These samples will be airdried (usually <40oC) and sieved to <2 mm size fraction before hot aqua regia extraction (comparable to SFS-ISO
11466:2007 standard). Table provides the list of elements detection limits (attention, not theoretical detection limits
for blank samples but practical detection limits as valid for the soil samples and evaluated from the duplicates!) that
should be reached.
Minimum list of elements to be determined after aqua regia extraction with detection limits, desired practical
detection limits and fields to be filled in. Minimum criteria: at least 90 % of the concentrations of all the listed
elements will be determined with detection limit (or better). If the desired DL is defined, additional points will
be given for elements determined with the desired practical detection limit.
Element
Ag
Al
As
B
Ba
Be
Bi
Ca
Cd
Co
Cr
Cu
Fe
K
La
Mg
Mn
Mo
Na
Ni
P
Pb
Rb
S
Sb
Sc
Se
Sn
Sr
Te
Th
Detection limit Desired
mg kg-1
DL
mg kg-1
0.5
0.002
100
15
0.5
0.01
5
1
1
0.1
0.005
0.1
0.01
100
0.4
0.01
1
1
1
100
100
10
1
15
1
0.4
0.01
50
2
50
5
0.1
10
200
20
0.5
0.0005
0.5
0.1
0.1
0.02
1
0.1
1
10
0.006
10
0.01
Can be DL of the Measurement
analysed laboratory (ICP-MS,
(Y/N)
GFAAS …)
GEOLOGIAN TUTKIMUSKESKUS
APPENDIX B2
5.10.2015
Ti
Tl
U
V
W
Y
Zn
Zr
2
0.1
0.1
2
0.2
2
3
6
0.03
0.03
0.5
2 (2)
Reg No E/336/251/2015