PREN 15937 : DRAFT 2009

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Interferences and sources of errors
6 Reagents
7 Apparatus
8 Sampling and sample pre-treatment
9 Procedure
   9.1 Extraction
   9.2 Calibration by checking the cell constant
   9.3 Measurement of the specific electrical
       conductivity of the filtrates
   9.4 Blank determination
   9.5 Quality Assurance of the overall procedure
10 Expression of results
11 Precision data
12 Test report
Annex A (informative) - Repeatability and reproducibility data
   A.1 Materials used in the interlaboratory comparison study
   A.2 Interlaboratory comparison results
   A.3 Repeatability and reproducibility limits
Bibliography

Defines an instrumental method for routine determinations of specific electrical conductivity in aqueous extracts of sludge (fresh), treated biowaste (fresh) or soil (fresh or air-dry).