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AS 4969.4:2008 (R2018)

AS 4969.4:2008 (R2018)

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Analysis of acid sulfate soil – Dried samples – Methods of test – Determination of 1 M potassium chloride extractable sulfur (SKCl), calcium (CaKCl) and magnesium (MgKCl)

Published By Publication Date Number of Pages
AS 2008-06-30 13
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Scope

This Standard specifies a method for the determination of potassium chloride extractable sulfur (SKCl), calcium (CaKCl) and magnesium (MgKCl) in acid sulfate soil after the determination of pHKCl and TAA in AS 4969.2.
NOTES:
1 This extraction procedure recovers soluble and exchangeable sulfate, sulfate from gypsum, as well as some sulfate from aluminium hydroxy-sulfate compounds (such as basaluminite). Sulfate from jarosite and similar iron hydroxy-sulfate minerals is not significantly recovered. Methods to determine the residual sulfur held in these iron hydroxy-sulfate minerals are given in AS 4969.6 and AS 4969.11.
2 This extraction procedure recovers soluble and exchangeable calcium and magnesium, and calcium from gypsum.
3 The KCl extractable sulfur (SKCl), calcium (CaKCl) and magnesium (MgKCl) measurements can be used in combination with HCl extractable sulfur, calcium and magnesium (AS 4969.8) to determine the net acid-soluble sulfur, calcium and magnesium (AS 4969.11).

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AS 4969.4:2008 (R2018)
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