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SRPS H.B8.127:1980

Cryolite, natural and artificial, and aluminium fluoride for industrial use — Determination of sulphate content — Barium sulphate gravimetric method

Jun 21, 1980
Jun 21, 1980
95.99   Withdrawal of Standard   Dec 20, 2012

General information

95.99     Dec 20, 2012

ISS

B082

International Standard

71.060.50  

Serbian  

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Scope

Applicable to products having a content, expressed as sulphur trioxide, equal to or more than 0.1 % (m/m). Bases on alkaline fusion of a test portion with a mixture of sodium carbonate and boric acid. Extraction of the fused mass with perchloric acid solution and precipitation of the sulphate ions with barium chloride in an acidified medium. Filtration on a fine-texture, ashless filter paper (pore diameter approximately 0.4 to 1.0 m). Calcination after drying in an electric oven at (850 20) °C. Weighing of the residue.

Life cycle

NOW

WITHDRAWN
SRPS H.B8.127:1980
95.99 Withdrawal of Standard
Dec 20, 2012

Related project

Adopted from ISO 4280:1977