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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
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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

PUBLISH DATE 1984
ISO 3856-5:1984

The principle consists in formation of a coloured complex from hexavalent chromium and diphenylcarbazide solution.

After addition of orthophosphoric acid and sulfuric acid, spectral photometric measurement of the colour at a wavelength in the region of 540 nm is performed.

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 is the referee method in cases of dispute.

This second edition cancels and replaces the ISO 3856/5-1980, of which it constitutes a thorough revision.

SDO ISO: International Organization for Standardization
Document Number ISO 3856
Publication Date Nov. 1, 1984
Language en - English
Page Count
Revision Level
Supercedes
Committee ISO TC 35/SC 2/WG 10
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