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ISO 3856-5:1984

Paints and varnishes — Determination of "soluble" metal content — Part 5: Determination of hexavalent chromium content of the pigment portion of the liquid paint or the paint in powder form — Diphenylcarbazide spectrophotometric method

Oct 1, 1984

General information

90.93     Mar 6, 2023

ISO

ISO/TC 256

International Standard

87.040  

French   English  

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Scope

The principle consists in formation of a coloured complex from hexavalent chromium and diphenylcarbazide solution. After addition of orthophosphoric acid and sulfuric acid, spectralphotometric easurement of the colour at a wavelength in the region of 540 nm. The method is applicable to coating materials having hexavalent chromium contents in the range of about 0,05 % (m/m) to 5 % (m/m). This method id the referee method in cases of dispute. This second edition cancels and replaces the ISO 3856/5-1980, of which it constitutes a through revision.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 3856-5:1980

NOW

PUBLISHED
ISO 3856-5:1984
90.93 Standard confirmed
Mar 6, 2023