NBN EN 62021-1 : 2003
Current
The latest, up-to-date edition.
INSULATING LIQUIDS - DETERMINATION OF ACIDITY - PART 1: AUTOMATIC POTENTIOMETRIC TITRATION
01-12-2013
FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents and auxiliary products
5.1 Reagents
5.2 Titration reagent
5.3 Titration solvent
5.4 Potassium hydrogen phthalate, primary standard
5.5 Potassium chloride reference electrolyte
5.6 Aqueous buffer solutions
5.7 Cleaning solution
6 Apparatus
6.1 Potentiometric titration apparatus
6.2 Glass indicating electrode
6.3 Reference electrode
6.4 Stirrer
6.5 Titration vessel
6.6 Titration stand
7 Sampling
8 Preparation and maintenance of electrode system
9 Calibration of apparatus
10 Procedure
10.1 Standardization of alcoholic potassium hydroxide
solution
10.2 Blank titration
10.3 Sample titration
11 Calculation
12 Precision
12.1 Repeatability
12.2 Reproducibility
13 Report
Annex ZA (normative) Normative references to international
publications with their corresponding European
publications
Bibliography
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