Reference number
ISO 1618:1976
© ISO 2024
ISO 1618:1976
Aluminium oxide primarily used for the production of aluminium — Determination of vanadium content — N-Benzoyl-N-phenylhydroxylamine photometric method
Edition 1
1976-09
Withdrawn
Withdrawn (Edition 1, 1976)

Abstract

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.

General information

  • Status
     : Withdrawn
    Publication date
     : 1976-09
    Stage
    : Withdrawal of International Standard [95.99]
  • Edition
     : 1
    Number of pages
     : 4
  • Technical Committee :
    ISO/TC 226
    ICS :
    71.100.10 
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