Assessment of peroxide oxidation for acid sulfate soil analysis. 1. Reduced inorganic sulfur

Ward, NJ, Sullivan, LA, Bush, RT and Lin, Chu Xia 2002, Assessment of peroxide oxidation for acid sulfate soil analysis. 1. Reduced inorganic sulfur, Soil Research, vol. 40, no. 3, pp. 433-442, doi: 10.1071/sr01009.

Title Assessment of peroxide oxidation for acid sulfate soil analysis. 1. Reduced inorganic sulfur
Author(s) Ward, NJ
Sullivan, LA
Bush, RT
Lin, Chu XiaORCID iD for Lin, Chu Xia
Journal name Soil Research
Volume number 40
Issue number 3
Start page 433
End page 442
Total pages 10
Publisher CSIRO Publishing
Place of publication Melbourne, Vic.
Publication date 2002
ISSN 1838-675X
Summary The reduced inorganic sulfur fraction of 4 acid sulfate soil (ASS) materialswas quantified using a variety of peroxide oxidation procedures. Thetemperature and duration of the peroxide oxidation were found to markedlyaffect the peroxide oxidisable sulfur determination. For 3 ASS materials withlow total carbon content (i.e. <2.5% C), peroxide oxidisable sulfurunderestimated the reduced inorganic sulfur fraction, with the peroxideoxidisable sulfur determinations being as low as 42% of thosedetermined using chromium reducible sulfur technique. The precipitation ofjarosite during peroxide oxidation was a major factor contributing to theunderestimation of reduced inorganic sulfur in these materials. Apparentlosses of sulfur of approximately 25% on average occurred duringperoxide oxidation budget accounting; this also contributed towards theobserved underestimation of reduced inorganic sulfur. It is most likely thatthese unaccounted losses are due to atmospheric losses of sulfur. In a peatASS, one of the peroxide oxidation methods overestimated the reduced inorganicsulfur fraction and was attributed to the release of a large reserve oforganic sulfur in this material by the peroxide. This study shows the peroxideoxidation methods examined here are subject to substantial interferences.Consequently these peroxide oxidation methods are unable to reliably provideaccurate measurements of the reduced inorganic sulfur fraction in ASSmaterials.pyritic sulfur, peroxide oxidisable sulfur, chromium reducible sulfur,jarosite, sulfur budget.
Language eng
DOI 10.1071/sr01009
Indigenous content off
HERDC Research category C1.1 Refereed article in a scholarly journal
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