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Homepage>BS Standards>13 ENVIRONMENT. HEALTH PROTECTION. SAFETY>13.080 Soil quality. Pedology>13.080.10 Chemical characteristics of soils>BS 7755-3.9:1995 Soil quality. Chemical methods Extraction of trace elements soluble in aqua regia
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immediate downloadReleased: 1995-10-15
BS 7755-3.9:1995 Soil quality. Chemical methods Extraction of trace elements soluble in aqua regia

BS 7755-3.9:1995

Soil quality. Chemical methods Extraction of trace elements soluble in aqua regia

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Standard number:BS 7755-3.9:1995
Pages:12
Released:1995-10-15
ISBN:0 580 24695 7
Status:Standard
DESCRIPTION

BS 7755-3.9:1995


This standard BS 7755-3.9:1995 Soil quality. Chemical methods is classified in these ICS categories:
  • 13.080.10 Chemical characteristics of soils

This International Standard specifies a method for the extraction, with aqua regia, of trace elements from soils and similar materials, prepared according to ISO 11464, and containing less than about 20 % (m/m) organic carbon according to ISO 10694. Materials containing more than about 20 % (m/m) organic carbon will require treatment with additional nitric acid (see note 8).

The resulting solution is suitable for the determination of trace elements using appropriate atomic spectrometric techniques. With high solute concentrations in extract solutions, spectral interferences and background enhancement should be expected.

NOTE 1 Aqua regia will not totally dissolve most soils and similar materials, and the efficiency of extraction for particular elements differs from element to element. Such efficiency might also differ for the same element in different matrices. Users of this International Standard should carry out a programme of analysis using reference materials to assure themselves that the method given here is appropriate for their needs. Elements extractable in aqua regia cannot, therefore, be decribed as “totals”; conversely they cannot be regarded as the “bio-available” fraction, as the extraction procedure is too vigorous to represent any biological process.