NF EN 12338 : 1998

Foreword
Introduction
1 Scope
2 Normative references
3 General references
4 Determination of mercury after tin (II) chloride
    reduction and enrichment by amalgamation
    4.1 Working range
    4.2 Principle
    4.3 Interferences
    4.4 Reagents
    4.5 Apparatus
    4.6 Sampling and sample pretreatment
    4.7 Digestion method using permanganate peroxodisulfate
    4.8 Procedure
    4.9 Calculation
    4.10 Expression of results
    4.11 Test report
5 Determination of mercury after sodium tetrahydroborate
    reduction and enrichment by amalgamation
    5.1 Working range
    5.2 Principle
    5.3 Interferences
    5.4 Reagents
    5.5 Apparatus
    5.6 Sampling and sample pretreatment
    5.7 Digestion method
    5.8 Procedure
    5.9 Calculation
    5.10 Expression of results
    5.11 Test report
6 Precision data
Annex A (informative) Ultrasonic digestion method
Annex B (informative)
Annex C (informative) Microwave digestion method
Annex D (informative) Bibliography

Defines the determining of mercury in two parts using either tin(II) chloride or sodium tetrahydroborate as reducing agent.