BH GSO ISO 6271:2022

ISO 6271:2015
Bahraini Standard   Current Edition · Approved on 28 April 2022

Clear liquids — Estimation of colour by the platinum-cobalt colour scale

BH GSO ISO 6271:2022 Files

English 6 Pages
Current Edition Reference Language
20.3 BHD

BH GSO ISO 6271:2022 Scope



ISO 6271:2015 specifies a spectrophotometric method for estimating the colour of clear liquids in terms of platinum-cobalt units (Pt-Co units). It is applicable to clear liquids having a colour characteristic similar to those of the platinum-cobalt colour scale specified in Annex A. For products with colours more intense than the Pt-Co stock solution the method specified in ISO 4630 applies.

The spectrophotometric method provides a more precise way of measuring Pt-Co colour than a visual sample comparison by human eyes.

NOTE The term "Pt-Co colour" used here is preferred over the terms "Hazen colour" and "APHA colour".

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