BS EN ISO 10523:2012

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Interferences
6 Reagents
7 Apparatus
8 Sampling
9 Procedure
10 Expression of results
11 Test report
Annex A (informative) - pH values of primary standard reference
        solutions
Annex B (informative) - Operative measurements in flow systems
Annex C (informative) - Field measurement (on-site measurement)
Annex D (informative) - Measurements of the pH value in water
        with low ionic strength
Annex E (informative) - Performance data
Bibliography

Describes a method for determining the pH value in rain, drinking and mineral waters, bathing waters, surface and ground waters, as well as municipal and industrial waste waters, and liquid sludge, within the range pH 2 to pH 12 with an ionic strength below I = 0,3 mol/kg (conductivity: gamma [25 degrees C] < 2000 mS/m) solvent and in the temperature range 0 degrees C to 50 degrees C.

This International Standard specifies a method for determining the pH value in rain, drinking and mineral waters, bathing waters, surface and ground waters, as well as municipal and industrial waste waters, and liquid sludge, within the range pH 2 to pH 12 with an ionic strength below I = 0,3 mol/kg (conductivity: γ25 °C < 2 000 mS/m) solvent and in the temperature range 0 °C to 50 °C.