AS 4969.2:2024 sets out a method for the determination of pH in a 1 M KCl soil suspension and where required titratable actual acidity in acid sulfate soil
Table of contents
Header
About this publication
Preface
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents
5.1 General
5.2 Calibration solutions for the pH meter
5.2.1 General
5.2.2 Buffer solution, pH 4.00 at 20 °C
5.2.3 Buffer solution, pH 6.88 at 20 °C
5.2.4 Buffer solution, pH 9.22 at 20 °C
5.3 Potassium chloride solution, 1 M
5.4 Standardized NaOH solutions
5.4.1 0.25 M NaOH
5.4.2 0.05 M NaOH
6 Apparatus
7 Procedure
7.1 Preparation of the suspension
7.2 Measurement of pHKCl
7.2.1 Calibration of automatic titrator or pH meter
