BS 6068-2.29:1987

National foreword
1 Scope
2 Field of application
Section 1 Method A - Direct determination by flame atomic
                     absorption spectrometry
3 Principle
4 Reagents
5 Apparatus
6 Sampling and samples
7 Procedure
8 Expression of results
9 Test report
Section 2 Method B - Determination by flame atomic absorption
                     spectrometry after chelation (APDC) and
                     extraction (MIBK)
10 Principle
11 Reagents
12 Apparatus
13 Sampling and samples
14 Procedure
15 Expression of results
16 Test report
Section 3 Method C - Determination by flame atomic absorption
                     spectrometry after chelation (HMA-HMDC) and
                     extraction (DIPK-xylene)
17 Principle
18 Reagents
19 Apparatus
20 Sampling and samples
21 Procedure
22 Expression of results
23 Test report
Annex A - Pretreatment of the sample when determining
          total metals
Annex B - Checking complete extraction (Method C)

Three methods are given, one involving direct determination and two involving prior complex formation and extraction. The first is applicable when concentrations are relatively high whereas the last two are most applicable for waters of an unknown nature or high in dissolved solids.

This International Standard specifies three methods for the determination of cobalt, nickel, copper, zinc, cadmium and lead in water by flame atomic absorption spectrometry: Section1 : method A, for direct determination by flame atomic absorption spectrometry; Section2 : method B, for determination by flame atomic absorption spectrometry after chelation (APDC) and extraction (MIBK); Section3 : method C, for determination by flame atomic absorption spectrometry after chelation (+MA-+MDC) and extraction (DIPK-xylene).