Reference number
ISO 2211:1973
ISO 2211:1973
© ISO 2025
International Standard
ISO 2211:1973
Liquid chemical products — Measurement of colour in Hazen units (platinum-cobalt scale)
Edition 1
1973-10
1973-10
ISO 2211:1973
7015
Published
(Edition 1, 1973)
This publication was last reviewed and confirmed in 2021.
Therefore this version remains current.
Abstract
Applicable only to clear, slightly coloured liqids. Such colour characteristics are described as brownish-yellow. The principle is based on a visual comparison of the colour of a sample with that of colour standards. The results are expressed in terms of the platinum-cobalt scale. For routine control purposes a comparator, colorimeter or spectrophotometer may be used, if the values so obtained are identical with those obtained by visual comparison.