Reference number
ISO 2211:1973
ISO 2211:1973
© ISO 2024
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
Publicado
(Edición 1, 1973)
Esta publicación se revisó y confirmó por última vez en 2021.
Por lo tanto, esta versión es la actual.
Resumen
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.