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  • BSI
    BS ISO 14388-2:2014 Soil quality. Acid-base accounting procedure for acid sulfate soils - Chromium reducible sulfur (CRS) methodology
    Edition: 2014
    $411.69
    / user per year

Description of BS ISO 14388-2:2014 2014

This part of ISO 14388 specifies a suite of methods used to determine the net acidity in acid sulfate soils. This part of ISO 14388 specifies a method for measuring chromium reducible sulfur (SCR) by iodimetric titration of distilled hydrogen sulfide trapped as zinc sulfide, following acidic chromous chloride digestion. This method determines inorganic sulfides (e.g. pyrite, marcasite, greigite, mackinawite) and elemental sulfur in acid sulfate soil without interferences from organic sulfur and oxidized forms of sulfur such as sulfate.

On a separate test portion of soil, the pH in a 1 mol/l KCl soil suspension (pHKCl) is determined. When pHKCl is < 6,5, titratable actual acidity (TAA) is then determined. Subsequently, potassium chloride extractable sulfur (SKCl), calcium (CaKCl), and magnesium (MgKCl) can also be determined. Where jarosite is identified in the soil (or where pHKCl is < 4,5), net acid-soluble sulfur (SNAS) is determined by the difference between hydrochloric acid extractable sulfur (SHCl) and potassium chloride extractable sulfur. On samples where pHKCl is < 6,5, acid neutralizing capacity is determined by measuring either inorganic carbon (CIN) by combustion furnace, or ANCBT (ANC measured by back-titration of acid remaining following an acid digest).



Standard NumberBS ISO 14388-2:2014
TitleSoil quality. Acid-base accounting procedure for acid sulfate soils - Chromium reducible sulfur (CRS) methodology
StatusConfirmed
Publication Date2014-09-30
Identical National Standard OfISO 14388-2:2014
DescriptorsSoil testing, Phosphorus organic compounds, Microbiological analysis, Determination of content, Biological analysis and testing, Microbiology, Fatty acids, Quality, Soils, Lipids, Fat extraction methods, Microorganisms, Chromatography, Chemical analysis and testing
ICS13.080.10 Chemical characteristics of soils
CommitteeEH/4
ISBN978 0 580 78161 2
PublisherBSI
Pages30

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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