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>ISO Standards>ISO 1618:1976-Aluminium oxide primarily used for the production of aluminium-Determination of vanadium content-N-Benzoyl-N-phenylhydroxylamine photometric method
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immediate downloadReleased: 1976
ISO 1618:1976-Aluminium oxide primarily used for the production of aluminium-Determination of vanadium content-N-Benzoyl-N-phenylhydroxylamine photometric method

ISO 1618:1976

Aluminium oxide primarily used for the production of aluminium

CURRENCY
42 EUR
Standard´s number:ISO 1618:1976
Pages:4
Edition:1
Released:1976
Language:English
DESCRIPTION

ISO 1618:1976


The method is applicable to products having vanadium contents between 0,0003 % (m/m) and 0,016 % (m/m), provided that the content of chromic oxide and titanic oxide does not exceed 0,002 % (m/m) and 0,006 % (m/m), respectively. The principle consists in a previous oxidation of the vanadium contained in the test sample to vanadium(V) by patassium permanganate in sulphuric acid solution. Formation of the vanadium-N-benzoyl-N-phenylhydroxylamine complex. Extraction of the violet coloured complex with chloroform in hydrochloric acid*solution. Photometric measurement of the coloured complex at a wavelength of about 524 nm.
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