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SRPS H.B8.187:1979

Aluminium fluoride for industrial use — Determination of fluorine content — Modified Willard-Winter method

Jul 30, 1979
Jul 30, 1979
95.99   Withdrawal of Standard   Aug 27, 2012

General information

95.99     Aug 27, 2012

ISS

B082

International Standard

71.060.50  

Serbian  

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Scope

The principle of the method consists in fusion of a test portion with sodium carbonate. Separation of fluorine by distillation with sulphuric acid. Titration with thorium nitrate solution using sodium alizarinsulphonate-methylene blue as indicator. Alternatively, the thorium nitrate titration may be made using only sodium alizarinsulphonate; the end-point being spectrophotometrically determined at 525 nm.

Life cycle

NOW

WITHDRAWN
SRPS H.B8.187:1979
95.99 Withdrawal of Standard
Aug 27, 2012

Related project

Adopted from ISO 2362:1972