Reference number
ISO 7100:1983
© ISO 2024
ISO 7100:1983
Phosphoric acid for industrial use (including foodstuffs) — Determination of vanadium content — Phosphotungsten vanadate spectrometric method
Edition 1
1983-06
Withdrawn
Withdrawn (Edition 1, 1983)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

  • Status
     : Withdrawn
    Publication date
     : 1983-06
    Stage
    : Withdrawal of International Standard [95.99]
  • Edition
     : 1
    Number of pages
     : 2
  • Technical Committee :
    ISO/TC 47
  • RSS updates

Life cycle

Got a question?

Check out our Help and Support

Check out our FAQs

Customer care
+41 22 749 08 88

Opening hours:
Monday to Friday - 09:00-12:00, 14:00-17:00 (UTC+1)

  2. Store
  3. Standards catalogue
  4. ICS
  5. 67
  6. 67.220
  7. 67.220.20
  8. ISO 7100:1983