FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents
5.1 Titration reagent
5.2 Titration solvent
5.3 Potassium hydrogen phthalate, primary standard
5.4 Standard hydrochloric acid solution
5.5 Alkali Blue 6B indicator solution
5.6 Cobalt nitrate solution
6 Apparatus
6.1 Titration vessel
6.2 Stirrer
6.3 Burette
7 Sampling
8 Procedure
8.1 Standardization of alcoholic potassium hydroxide
solution
8.2 Blank titration
8.3 Sample titration
9 Calculation of results
10 Precision
10.1 Repeatability
10.2 Reproducibility
11 Report
Annex A (informative) Determination of acidity in electrical
insulating oils photometric titration
Annex ZA (normative) Normative references to international
publications with their corresponding European
publications