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ISO 900:1977

Aluminium oxide primarily used for the production of aluminium — Determination of titanium content — Diantipyrylmethane photometric method

Oct 1, 1977
95.99   Withdrawal of Standard   Feb 4, 2016

General information

95.99     Feb 4, 2016

ISO

ISO/TC 226

International Standard

71.100.10  

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Scope

Applicable to all products having a titanium dioxide content of equal to or more than 0.001 % (m/m). Describes the preparation of the diantipyrylmethane solution and the preparation of the titanum standard solution. The procedure of the preparation of a principal solution or the chemical analysis by an alkaline fusion is carried out according to ISO 804 replacing the nitric acid solution by the sulphuric one. After extraction of the fused mass with sulphuric acid solution formation of the titanium-diantipyrylmethane complex (approximately 4.6 N solution). Photometric measurement of the coloured complex at a wavelength of about 420 nm. Has also been approved by the IUPAC. Replaces and cancels ISO Recommendation R 900/1968 of which it constitutes a technical revision.

Life cycle

NOW

WITHDRAWN
ISO 900:1977
95.99 Withdrawal of Standard
Feb 4, 2016

National adoptions

SRPS H.B8.615:1979  
ISS

Aluminium oxide primarily used for the production of aluminium — Determination of titanium content — Diantipyrylmethane photometric method

95.99   Withdrawal of Standard

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