1 Scope
2 Normative references
3 Method A - Determination of cadmium, chromium, cobalt,
copper, lead, manganese, nickel and zinc by flame atomic
absorption spectrometry
3.1 Principle
3.2 Reagents
3.3 Preparation of stock and standard solutions of
individual elements
3.4 Apparatus
3.5 Procedure
3.6 Determination of test portion
3.7 Calculation
3.8 Precision
3.9 Expression of results
3.10 Test report
4 Method B - Determination of cadmium, chromium, cobalt,
copper, lead, manganese, nickel and zinc by electrothermal
atomic absorption spectrometry
4.1 Principle
4.2 Reagents
4.3 Stock and standard solutions
4.4 Apparatus
4.5 Procedure
4.6 Calibration and determination
4.7 Plotting the graph
4.8 Calculation
4.9 Expression of results
4.10 Precision
4.11 Test report
Annex A Results of interlaboratory tests