Improvements to peroxide oxidation methods for analysing sulfur in acid sulfate soils

McElnea, A. E., Ahern, C. R. and Menzies, N. W. (2002) Improvements to peroxide oxidation methods for analysing sulfur in acid sulfate soils. Australian Journal of Soil Research, 40 7: 1115-1132. doi:10.1071/SR01100

Author McElnea, A. E.
Ahern, C. R.
Menzies, N. W.
Title Improvements to peroxide oxidation methods for analysing sulfur in acid sulfate soils
Journal name Australian Journal of Soil Research   Check publisher's open access policy
ISSN 0004-9573
Publication date 2002
Sub-type Article (original research)
DOI 10.1071/SR01100
Volume 40
Issue 7
Start page 1115
End page 1132
Total pages 18
Editor J. Fegent
Place of publication Collingwood, Australia
Publisher CSIRO Publishing
Collection year 2002
Language eng
Subject C1
300103 Soil Chemistry
770402 Land and water management
Abstract Improvements to peroxide oxidation methods for analysing acid sulfate soils (ASS) are introduced. The soil solution ratio has been increased to 1 : 40, titrations are performed in suspension, and the duration of the peroxide digest stage is substantially shortened. For 9 acid sulfate soils, the peroxide oxidisable sulfur value obtained using the improved method was compared with the reduced inorganic sulfur result obtained using the chromium reducible sulfur method. Their regression was highly significant, the slope of the regression line was not significantly different (P = 0.05) from unity, and the intercept not significantly different from zero. A complete sulfur budget for the improved method showed there was no loss of sulfur as has been reported for earlier peroxide oxidation techniques. When soils were very finely ground, efficient oxidation of sulfides was achieved, despite the milder digestion conditions. Highly sulfidic and organic soils were shown to be the most difficult to analyse using either the improved method or the chromium method. No single analytical method can be universally applied to all ASS, rather a suite of methods is necessary for a thorough understanding of many ASS. The improved peroxide method, in combination with the chromium method and the 4 M HCl extraction, form a sound platform for informed decision making on the management of acid sulfate soils.
Keyword Agriculture, Soil Science
Improved Peroxide Method
Digest Conditions
Peroxide Oxidisable Sulfur
Sulfur Budgets
Eastern Australia
Pyrite Oxidation
Soil Science
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Agriculture and Food Sciences
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Citation counts: TR Web of Science Citation Count  Cited 13 times in Thomson Reuters Web of Science Article | Citations
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Created: Tue, 14 Aug 2007, 17:44:36 EST