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ISO 7100:1983

Phosphoric acid for industrial use (including foodstuffs) — Determination of vanadium content — Phosphotungsten vanadate spectrometric method ISO 7100:1983

Publication date:   Jun 1, 1983

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 | 71.060.30   Acids

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Scope

A yellow complex is formed by reaction of the vanadium present in a test portion with phosphoric acid and sodium tungstate in acid medium. The spectrometric measurement of the absorbance is carried out at a wavelength of about 425 nm. The method is applicable to products having a vanadium content equal to or greater than 3 mg/kg.

Life cycle

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WITHDRAWN
ISO 7100:1983
95.99 Withdrawal of Standard
May 27, 2002




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