Reference number
ISO 7100:1983
ISO 7100:1983
Phosphoric acid for industrial use (including foodstuffs) — Determination of vanadium content — Phosphotungsten vanadate spectrometric method
Edition 1
1983-06
Withdrawn
ISO 7100:1983
13685
Withdrawn (Edition 1, 1983)

Abstract

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.

General information

  •  : Withdrawn
     : 1983-06
    : Withdrawal of International Standard [95.99]
  •  : 1
     : 2
  • ISO/TC 47
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