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AS 4969.12:2009 (R2018)

AS 4969.12:2009 (R2018)

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Analysis of acid sulfate soil – Dried samples – Methods of test – Complete suspension peroxide oxidation combined acidity and sulfur (SPOCAS) method

Published By Publication Date Number of Pages
AS 2009-03-18 29
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Scope

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. Following this, potassium chloride extractable sulfur (SKCl), calcium (CaKCl) and magnesium (MgKCl) are determined. On a separate test portion, peroxide pH (pHOX), titratable peroxide acidity (TPA) and excess acid neutralizing capacity (ANCE) are determined following digestion with 30% hydrogen peroxide. Following this, peroxide sulfur (SP), calcium (CaP) and magnesium (MgP) are determined. On samples where jarosite is present, or pHKCl < 4.5, residual acid soluble sulfur (SRAS) is determined on the soil residue remaining after peroxide digestion.

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AS 4969.12:2009 (R2018)
$37.70