DIN 38405-7:2002-04

Foreword
Introduction
1 Scope
2 Normative references
3 Concepts
4 Determination of total cyanide
5 Determination of readily liberated cyanide
6 Determination by ion chromatography
7 Determination by potentiometric titration
8 Expression of results
9 Test report
10 Results of interlaboratory testing
Appendix A: Examples of suitable chromatographic
            separating systems
Explanatory notes
Bibliography

Describes two methods of determining cyanide: 1) The decomposition and separation method serves to determine total cyanide in lightly polluted water (e.g. purified waste water, ground water, drinking water and surface water) whose cyanide concentration (calculated as cyanide ions) is between 0,01 mg/l and 10 mg/l. If the concentration is greater than 10 mg/l, the sample is to be diluted or a smaller volume is to be taken. 2) The separation method serves to determine readily liberated cyanide in lightly polluted water (e.g. purified waste water, ground water, drinking water and surface water) whose cyanide concentration (calculated as cyanide ions) is between 0,01 mg/l and 10 mg/l. If the concentration is greater than 10 mg/l, the sample is to be diluted or a smaller volume is to be taken.