CEN - EN ISO 6271
Clear liquids - Estimation of colour by the platinum-cobalt colour scale
active, Most Current
| Organization: | CEN |
| Publication Date: | 1 December 2015 |
| Status: | active |
| Page Count: | 16 |
| ICS Code (Binders): | 87.060.20 |
scope:
This International Standard 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".
Document History
EN ISO 6271
December 1, 2015
Clear liquids - Estimation of colour by the platinum-cobalt colour scale
This International Standard 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...