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ISO 4275:1977

Ammonium hydrogen carbonate for industrial use (including foodstuffs) — Determination of arsenic content — Silver diethyldithiocarbamate photometric method ISO 4275:1977

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

67.220.20   Food additives | 71.060.50   Salts

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Scope

Applicable to products having As contents more than 0.2 mg/kg. The principle consists in reduction of the element to arsine in a solution of silver diethyldithiocarbamate in pyridine. Photometric measurement of the purplish- red colour produced by the colloidally dispersed silver, at the maximum of the absorption curve (wavelength approximately 540 nm).

Life cycle

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WITHDRAWN
ISO 4275:1977
95.99 Withdrawal of Standard
May 27, 2002




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