Reference number
ISO 3119:1976
ISO 3119:1976
Boric acid, boric oxide and disodium tetraborates for industrial use — Determination of chromium content — Diphenylcarbazide photometric method
Edition 1
1976-04
Retirada
ISO 3119:1976
8276
Retirada (Edición 1, 1976)

Resumen

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.

Informaciones generales

  •  : Retirada
     : 1976-04
    : Retirada de la Norma Internacional [95.99]
  •  : 1
     : 3
  • ISO/TC 47
    71.060.01 
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