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ISO 12782-2
M00001617
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ISO 12782-2 1st Edition, June 1, 2012 Soil quality - Parameters for geochemical modelling of leaching and speciation of constituents in soils and materials - Part 2: Extraction of crystalline iron oxides and hydroxides with dithionite
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Description / Abstract:
This part of ISO 12782 specifies the determination of the
content of "reactive" iron in the form of crystralline iron oxides
and hydroxides in soil and other materials by extraction with
dithionite. Other materials also include waste. The content of
"reactive" iron can be used as input in geochemical models to
represent the content of crystalline iron (hydr)oxides.
NOTE Although the ammonium oxalate/oxalic acid extraction (ISO
12782-3) is commonly used to estimate "reactive" iron in the form
of iron oxides and hydroxides, this part of ISO 12782, in
conjunction with ISO 12782-1, has been shown to be more specific
for the extraction of crystalline and amorphous iron (hydr)oxides,
respectively[7]