Reference number
ISO 3119:1976
© ISO 2024
ISO 3119:1976
Boric acid, boric oxide and disodium tetraborates for industrial use — Determination of chromium content — Diphenylcarbazide photometric method
Edition 1
1976-04
Withdrawn
Withdrawn (Edition 1, 1976)

Abstract

Alkaline fusion of a test portion by sodium carbonate and subsequent neutralization by sulphuric acid. Measurement of the absorption of the complex formed by chromium and diphenylcarbazide at a wavelength of abour 540 nm after adding sodium azide for elimination of the colour caused by manganese.

General information

  • Status
     : Withdrawn
    Publication date
     : 1976-04
    Stage
    : Withdrawal of International Standard [95.99]
  • Edition
     : 1
    Number of pages
     : 3
  • Technical Committee :
    ISO/TC 47
    ICS :
    71.060.01 
  • RSS updates

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