NF EN ISO 20843 : 2011
Current
The latest, up-to-date edition.
PETROLEUM AND RELATED PRODUCTS - DETERMINATION OF PH OF FIRE-RESISTANT FLUIDS WITHIN CATEGORIES HFAE, HFAS AND HFC
12-01-2013
Foreword
Introduction
1 Scope
2 Normative references
3 Principle
4 Reagents and materials
4.1 Water
4.2 Standard solutions to calibrate the pH meter
4.3 Cleaning reagents
5 Apparatus
5.1 pH meter
5.2 Glass electrode and reference electrode or a
grouped electrode device
5.3 Thermometer
5.4 Analytical balance
6 Sampling
7 Procedure
7.1 Calibration of pH meter
7.2 Measurement of pH
8 Expression of results
9 Precision
9.1 General
9.2 Repeatability
9.3 Reproducibility
10 Test report
Annex ZA (normative) Normative references to international
publications with their relevant European publications
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