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.
Status : WithdrawnPublication date : 1976-04
Edition : 1Number of pages : 3
A standard is reviewed every 5 years
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