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
- Standard No.
- ISO 3856-5:1984
- Release Date
- 1984
- Published By
- International Organization for Standardization (ISO)
- Latest
- ISO 3856-5:1984
- 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.
ISO 3856-5:1984 history
- 1984 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
- 1980 ISO 3856-5:1980 Paints and varnishes — Determination of "soluble" metal content — Part 5: Determination of hexavalent chromium content of the pigment and extender portion of the paint — Diphenylcarbazide spectrophoto
