International Standard
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
Reference number
ISO 3856-5:1984
ISO 3856-5:1984
Edition 2
1984-10
1984-10
© ISO 2024
International Standard
p
ISO 3856-5:1984
9430
Published
(Edition 2, 1984)
This standard was last reviewed and confirmed in 2023.
Therefore this version remains current.
Abstract
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.
General information
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Status: PublishedPublication date: 1984-10Stage: International Standard confirmed [90.93]
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Edition: 2Number of pages: 3
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Technical Committee :ISO/TC 256ICS :87.040
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Life cycle
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Previously
WithdrawnISO 3856-5:1980
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Now
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