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BS ISO 23496:2019

BS ISO 23496:2019

$102.76

Determination of pH value. Reference buffer solutions for the calibration of pH measuring equipment

Published By Publication Date Number of Pages
BSI 2019 20
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This document specifies reference buffer solutions for the calibration of pH measuring equipment.

PDF Catalog

PDF Pages PDF Title
2 National foreword
6 Foreword
7 1 Scope
2 Normative references
3 Terms and definitions
8 4 Basic information
4.1 General
4.2 pH values of primary reference buffer solutions
9 4.3 pH values of secondary reference buffer solutions
13 5 Preparation of primary and secondary reference buffer solutions
5.1 General
5.2 Reference buffer solution A, pH(R) = 1,679(25 °C), Potassium tetraoxalate dihydrate
5.3 Reference buffer solution B, pH(R) = 3,557 (25 °C), Potassium hydrogen tartrate
5.4 Reference buffer solution C, pH(R) = 4,005 (25 °C), Potassium hydrogen phthalate
5.5 Reference buffer solution D, pH(R) = 6,865 (25 °C), Phosphate
14 5.6 Reference buffer solution E, pH(R) = 7,413 (25 °C), Phosphate
5.7 Reference buffer solution F, pH(R) = 9,180 (25 °C), Borax
5.8 Reference buffer solution G, pH(R) = 12,454 (25 °C), Calcium hydroxide
5.9 Reference buffer solution H, pH(R) = 3,776 (25 °C), Potassium dihydrogen citrate
5.10 Reference buffer solution I, pH(R) = 10,012 (25 °C), Sodium carbonate/sodium hydrogen carbonate
6 Storage and shelf life
7 Examples of pH(R) values of reference buffer solutions
8 Additional properties of reference buffer solutions
16 Annex A (informative) Examples of pH(R) values as a function of temperature at temperatures from 55 °C to 95 °C
17 Annex B (informative) Volumetric method
19 Bibliography

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BS ISO 23496:2019
$102.76