Codes & Standards - Purchase
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
SKU: iso_009430_103342
Published by ISO
Publication Year 1984
2 Edition
3 pages
Product Details
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.