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
Retirada
ISO 7100:1983
13685
Retirada (Edición 1, 1983)

Resumen

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.

Informaciones generales

  •  : Retirada
     : 1983-06
    : Retirada de la Norma Internacional [95.99]
  •  : 1
     : 2
  • ISO/TC 47
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