NF EN ISO 6271

NF EN ISO 6271

March 2016
Standard Current

Clear liquids - Estimation of colour by the platinum-colbalt colour scale

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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Main informations

Collections

National standards and national normative documents

Publication date

March 2016

Number of pages

12 p.

Reference

NF EN ISO 6271

ICS Codes

87.060.20   Binders

Classification index

T20-031

Print number

1

International kinship

ISO 6271:2015

European kinship

EN ISO 6271:2015
Sumary
Clear liquids - Estimation of colour by the platinum-colbalt colour scale



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".

Replaced standards (2)
NF EN ISO 6271-1
March 2005
Standard Cancelled
Clear liquids - Estimation of colour by the platinum-cobalt scale - Part 1 : visual method

Le présent document spécifie une méthode pour l'évaluation de la couleur, en unités de l'échelle Pt-Co, des liquides clairs. Il est applicable aux liquides clairs ayant des caractéristiques de couleur proches de celles de l'échelle de référence Pt-Co.

NF EN ISO 6271-2
March 2005
Standard Cancelled
Clear liquids - Estimation of colour by the platinum-cobalt scale - Part 2 : spectrophotometric method

ISO 6271-2:2004 specifies a spectrophotometric method for estimating the colour, in Pt-Co units, of clear liquids. It is applicable to clear liquids having a colour characteristic similar to those of the reference platinum-cobalt scale specified in ISO 6271-1, which describes a visual method. The method described provides a more precise way of measuring Pt-Co colour than that described in ISO 6271-1.

Table of contents
  • 1 Domaine d'application
  • 2 Références normatives
  • 3 Principe
  • 4 Appareillage et matériaux
  • 5 Échantillonnage
  • 6 Mode opératoire
  • 7 Expression des résultats
  • 8 Fidélité
  • 9 Rapport d'essai
  • Annexe A Étalons de couleur platine-cobalt
  • Bibliographie
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