ISO-6382 › General method for determination of silicon content -- Reduced molybdosilicate spectrophotometric method
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Specifies a method based on the depolymerization of any polymerized silica by treatment with sodium fluoride in the presence of hydrochloride acid resulting in the formation of the oxidized molycdosilicate, followed by the selective reduction of this complex in the presence of oxalic acid and in a sulphuric acid medium, and spectrophotometric measurement of the blue-coloured complex at the wavelength corresponding to maximum absorption (about 800 nm).
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71.040.40 (Chemical analysis Including analysis of gases and surface chemical analysis)
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Document Number
ISO 6382:1981
Revision Level
1ST EDITION
Status
Superseded
Publication Date
Nov. 1, 1981
Committee Number
ISO TC 47/SC 1