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ISO 3200:1975

Sodium and potassium silicates for industrial use — Determination of sulphates content — Barium sulphate gravimetric method

Mar 1, 1975
95.99   Withdrawal of Standard   May 27, 2002

General information

95.99     May 27, 2002

ISO

ISO/TC 47

International Standard

71.060.50  

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Scope

Applicable to the analysis of products having contents either above 0.1 % (m/m) or above 0.25 % (m/m) according to whether the product is readily or sparingly soluble in water. The principle consists in dissolution of a test portion either directly or after alkaline fusion. Separation of the insoluble matter. Precipitation, while boiling, of the sulphate ions in an acid medium. Filtration, washing and calcination of the precipitate. Weighing of the barium sulphate after treatment with hydrofluoric acid in order to remove any silica which may be present. Has also been approved by the IUPAC.

Life cycle

NOW

WITHDRAWN
ISO 3200:1975
95.99 Withdrawal of Standard
May 27, 2002

National adoptions

SRPS H.B8.320:1977  
ISS

Sodium and potassium silicates for industrial use — Determination of sulphates content — Barium sulphate gravimetric method

95.99   Withdrawal of Standard

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