PREN 15875 : DRAFT 2008

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviations
5 Principle
6 Reagents and laboratory devices
   6.1 Reagents
   6.2 Laboratory devices
7 Sampling and sample preparation
   7.1 Laboratory sample
   7.2 Test sample
   7.3 Determination of dry residue of the sample
   7.4 Test portion for the determination of
       neutralisation potential (NP)
8 Test procedures
   8.1 Part A: Determination of acid potential (AP)
       8.1.1 General
       8.1.2 Total sulfur content
       8.1.3 Disulfide (pyrite) content
       8.1.4 Calculation
   8.2 Part B: Determination of Neutralisation Potential (NP)
       8.2.1 General
       8.2.2 Carbonate rating (CR)
       8.2.3 Neutralisation potential (NP)
       8.2.4 Calculation
9 Calculation of Neutralisation Potential Ratio and Net
   Neutralisation Potential
10 Test report
Annex A (informative) - Example of a data sheet
Annex B (informative) - Operation and uses of the test:
        influence of parameters
   B.1 Sulfur Determination
   B.2 Particle size
   B.3 Mineralogy
       B.3.1 Sulfur minerals
       B.3.2 Sources of acidity
Annex C (informative) - Speciation of sulphur compounds
Annex D (informative) - Explanation of formulas used
Acid Potential (AP)
Carbonate rating (CR)
Bibliography

Describes methods to determine the potential of sulfide bearing materials for the formation of acidic drainage.