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ISO 3119:1976

Boric acid, boric oxide and disodium tetraborates for industrial use — Determination of chromium content — Diphenylcarbazide photometric method ISO 3119:1976

Publication date:   Apr 1, 1976

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

71.060.01   Inorganic chemicals in general

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Scope

Alkaline fusion of a test portion by sodium carbonate and subsequent neutralization by sulphuric acid. Measurement of the absorption of the complex formed by chromium and diphenylcarbazide at a wavelength of abour 540 nm after adding sodium azide for elimination of the colour caused by manganese.

Life cycle

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WITHDRAWN
ISO 3119:1976
95.99 Withdrawal of Standard
May 27, 2002




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