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