BS ISO 20280:2007

Foreword
1 Scope
2 Normative references
3 Principle
4 Reagents
5 Apparatus
6 Procedure
   6.1 Test portion
   6.2 Aqua regia extraction for arsenic, antimony
        and selenium
   6.3 Blank test solution
7 Method A - Electrothermal atomic absorption
              spectrometry: Preparation of calibration
              solutions and measurement
   7.1 General
   7.2 Calibration solutions for arsenic
   7.3 Calibration solutions for antimony
   7.4 Calibration solutions for selenium
   7.5 Calibration and determination with ETAAS
        measurement
8 Method B - Hydride-generation atomic absorption
   spectrometry: Preparation of calibration solutions and
   measurement
   8.1 Pre-reduction and calibration for the determination
        of arsenic
   8.2 Pre-reduction and calibration for the determination
        of antimony
   8.3 Pre-reduction and calibration for the determination
        of selenium
   8.4 Measurement of calibration and test solutions by
        hydride-generation atomic absorption spectrometry
9 Plotting the calibration graph
10 Calculation
   10.1 General
   10.2 Calculation according to the method of standard
        additions
11 Expression of results
12 Interferences
13 Precision
14 Test report
Bibliography

Describes methods for the determination of arsenic, antimony and selenium, in an aqua regia extract of soil obtained in accordance with ISO 11466, by electrothermal or hydride-generation atomic absorption spectrometry.

This International Standard specifies methods for the determination of arsenic, antimony and selenium, in an aqua regia extract of soil obtained in accordance with ISO11466, by electrothermal or hydride-generation atomic absorption spectrometry.