Numéro de référence
ISO 7100:1983
ISO 7100:1983
© ISO 2024
ISO 7100:1983
Acide phosphorique à usage industriel (y compris les industries alimentaires) — Dosage du vanadium — Méthode spectrométrique au phosphotungsto-vanadate
Edition 1
1983-06
1983-06
Annulée
Résumé
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.