Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus
5.1 Automatic Colorimeter
5.2 Certified Reference Standards
5.3 Optical Glass Sample Cells
6 Sampling
7 Preparation of test sample
7.1 Sample preparation
7.2 Samples requiring heating
7.3 Filtration
8 Procedure
9 Expression of results
10 Precision
10.1 Interlaboratory test
10.2 Repeatability
10.3 Reproducibility
11 Test report
Annex A (informative) - Results of an interlaboratory
trial
Bibliography