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ISO 1983:1977

Nitric acid for industrial use — Determination of sulphated ash — Gravimetric method ISO 1983:1977

Publication date:   Nov 1, 1977

95.99   Withdrawal of Standard   May 27, 2002

General information

95.99   Withdrawal of Standard   May 27, 2002

ISO

ISO/TC 47 Chemistry

International Standard

71.060.30   Acids

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Scope

The principle of the method consists inevaporation of a test portion in a platinum dish, conversion of the residue to sulphates by treatment with sulphuric acid; ignition in an electric furnace, controlled at (800 +- 25) °C, and weighing. Replaces ISO Recommendation R 1983-1971.

Life cycle

NOW

WITHDRAWN
ISO 1983:1977
95.99 Withdrawal of Standard
May 27, 2002




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