GEOLOGICAL SURVEY OF FINLAND
APPENDIX 1, D3
1 (2)
6.10.2015
E/349/251/2015
ELEMENTS TO BE DETERMINED FROM SOLID POWDER SAMPLES AFTER CHOSEN LEACHING
METHOD OR SAMPLES PROVIDED IN LIQUID PHASE (FAAS, GFAAS)
The following requirements are defined for wet chemistry methods for solid powder samples of ore and
test products or samples in liquid phase used mainly for operating the research activities. GTK will
collect samples from bench and pilot scale tests. The samples will be process feeds, final products of the
tests (concentrates, tailings), middlings (cleaner concentrates, cleaner tailings) or other process streams.
GTK will filter and dry the samples. The samples for analysis are provided usually as solid powder
samples in sample size of 2-20 g. But also solution samples are provided from the leaching tests with
varying conditions. The producer of the analysis will fine grind (if needed), further prepare by chosen
leaching method and chemically analyze the samples. The measuring can be taken place by flame atomic
absorption spectroscopy (FAAS) or electrothermal atomic absorption spectroscopy (GFAAS, with
graphite tube). The tenderer must be able to carry out the sample preparation to process the provided
sample suitable for analysis including for example leaching with HNO3, HF, HCIO4, aqua regia and
bromine methanol.
Table 1 provides the list of elements required and the detection limits that must be reached.
Table 1. Minimum list of elements to be determined by wet chemistry method with required detection
limits (DL) and fields to be filled in. Minimum criteria: Concentrations of all the listed elements will be
determined with required practical detection limit (or better).
Element Required Can be
DL of the
Measurement
DL
analysed laboratory (FAAS,
(Y/N)
GFAAS)
mg kg-1
Au
Ag
As
Bi
Ca
Co
Cu
Fe
Li
Mn
Ni
Pb
1
1
0,1
0,1
10
20
5
25
10
100
3
10
GEOLOGICAL SURVEY OF FINLAND
Sb
Te
Zn
0,3
0,01
3
APPENDIX 1, D3
2 (2)
6.10.2015
E/349/251/2015