Reference number
ISO 3856-5:1984
© ISO 2024
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
Edition 2
1984-10
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Published (Edition 2, 1984)
This publication was last reviewed and confirmed in 2023. Therefore this version remains current.

ISO 3856-5:1984

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Format
CHF 42
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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

  • Status
     : Published
    Publication date
     : 1984-10
    Stage
    : International Standard confirmed [90.93]
  • Edition
     : 2
    Number of pages
     : 3
  • Technical Committee :
    ISO/TC 256
    ICS :
    87.040 
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