ISO 3119:1976
Boric acid, boric oxide and disodium tetraborates for industrial use; Determination of chromium content; Diphenylcarbazide photometric method

Standard No.

ISO 3119:1976

Release Date

1976

Published By

International Organization for Standardization (ISO)

Status

Withdraw 2002-05

Latest

ISO 3119:1976

Scope

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

ISO 3119:1976 history

• 1976 ISO 3119:1976 Boric acid, boric oxide and disodium tetraborates for industrial use; Determination of chromium content; Diphenylcarbazide photometric method