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AS 4969.2-2008
$50.40
Analysis of acid sulfate soil – Dried samples, Method 2: Methods of test – Determination of 0pH
This Standard specifies a method for the determination of pH in a 1 M KCl soil suspension and where required titratable actual acidity (TAA) in acid sulfate soil.
Table of contents
Header
About this publication
Preface
1 Scope
2 Referenced documents
3 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 sodium hydroxide (NaOH) solutions
5.4.1 0.25 M NaOH
5.4.2 0.05 M NaOH
6 Apparatus
6.1 General
6.2 Automatic titration instrument or pH meter
6.3 Burette
6.4 Dispenser (manual or automatic)
6.5 Electronic balance 1
6.6 Electronic balance 2
6.7 pH electrodes
6.8 Sample bottle
6.9 Shaking or mixing machine
6.10 Stirrer
6.11 Temperature sensor
6.12 Titration vessel
7 Procedure
7.1 Preparation of the suspension
7.2 Measurement of pHKCl
7.2.1 Calibration of automatic titrator, or pH meter
7.2.2 Measurement of pH
7.3 Measurement of TAA
7.3.1 General
7.3.2 Procedure based on pHKCl result
8 TAA calculations
9 Precision
10 Test report
Cited references in this standard
Content history
[Current]
Please select a variation to view its description.
| Published | 30/06/2008 |
|---|---|
| Pages | 7 |
Please select a variation to view its pdf.
