ISO 1618:1976

Withdrawn

Aluminium oxide primarily used for the production of aluminium Determination of vanadium content N-Benzoyl-N-phenylhydroxylamine photometric method

Available format(s)

Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users

Withdrawn date

05-21-2019

Language(s)

English, French

Published date

09-01-1976

Publisher

International Organization for Standardization

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.

DevelopmentNote	Also numbered as BS 4140-12(1986) (07/2005)
DocumentType	Standard
Pages	4
PublisherName	International Organization for Standardization
Status	Withdrawn

Standards	Relationship
NBN T 03 412 : 1983	Identical

BS 4140-16:1986	Methods of test for aluminium oxide Determination of zinc content by flame atomic absorption
BS 4140-6:1980	Methods of test for aluminium oxide Determination of titanium content
BS 4140-9:1986	Methods of test for aluminium oxide Measurement of the angle of repose
BS 4140-4:1986	Methods of test for aluminium oxide Preparation of sample solution by alkaline fusion
BS 4140-13:1986	Methods of test for aluminium oxide Preparation of sample solution by treatment with hydrochloric acid under pressure
BS 4140-7:1986	Methods of test for aluminium oxide Determination of iron content
BS 4140-22:1980	Methods of test for aluminium oxide Determination of manganese content
BS 4140-5:1986	Methods of test for aluminium oxide Determination of silica content
BS 4140-8:1986	Methods of test for aluminium oxide Determination of absolute density using a pyknometer
BS 4140-1:1986	Methods of test for aluminium oxide Preparation and storage of test samples
BS 4140-11:1986	Methods of test for aluminium oxide Determination of sodium content
BS 4140-10:1986	Methods of test for aluminium oxide Determination of untamped density