This Standard specifies a method for the determination of residual acid soluble sulfur (SRAS) in acid sulfate soil after peroxide digestion (AS 4969.3) and the determination of peroxide sulfur (SP) (AS 4969.5). In order to perform this method, AS 4969.3 and AS 4969.5 shall have already been performed on the same test portion.
Table of contents
Header
About this publication
Preface
1 Scope
2 Referenced documents
3 Definitions
4 Principle
5 Reagents
5.1 General
5.2 Hydrochloric acid (ρ20) 1.16 g/mL
5.3 Hydrochloric acid solution, 4 M
5.4 Potassium chloride solution, 1 M
6 Apparatus
6.1 General
6.2 Centrifuge
6.3 Dispenser (manual or automatic)
6.4 Filter paper
6.5 Sample bottle
6.6 Shaking or mixing machine
7 Procedure
7.1 Rinsing of peroxide digested soil residue, extraction with 4 M HCl and determination of extractable sulfur
8 Calculation
8.1 Calculation of SRAS
8.2 Calculation of acidity attributed to SRAS (acid base accounting)
9 Precision
10 Test report
Appendix A
Cited references in this standard
Content history
AS 4969.6-2008 REC:2018
DR 06481
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