NF EN ISO 7887

NF EN ISO 7887

March 2012
Standard Current

Water quality - Examination and determination of colour

ISO 7887:2011 specifies four different methods, designated A to D, for the examination of colour.The previously most employed method for assessment of water colour in water treatment plants, limnological surveys, etc. was based on the hexachloroplatinate scale. Methods C and D are harmonized with this traditional procedure.Method A involves examination of apparent colour by visually observing a water sample in a bottle. This gives only preliminary information, for example for use in field work. Only the apparent colour can be reported.Method B involves determination of the true colour of a water sample using optical apparatus and is applicable to raw and potable water and to industrial water of low colour. A subclause on interferences is included.Method C involves determination of the true colour of a water sample using optical apparatus for comparison with hexachloroplatinate concentration at wavelength, λ = 410 nm. A subclause on interferences is included.Method D involves determination of colour by visual comparison with hexachloroplatinate standard solutions and can be applied to raw and drinking water. A subclause on interferences is included.Methods A and B are appropriate if the colour hue of the sample differs from the hue of the matching solution.When stating the result, the procedure used (methods A to D) is also recorded.

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Main informations

Collections

National standards and national normative documents

Publication date

March 2012

Number of pages

23 p.

Reference

NF EN ISO 7887

ICS Codes

13.060.60   Examination of physical properties of water
17.180.20   Colours and measurement of light
67.240   Sensory analysis

Classification index

T90-034

Print number

1 - 19/03/2012

International kinship

ISO 7887:2011

European kinship

EN ISO 7887:2011
Sumary
Water quality - Examination and determination of colour

ISO 7887:2011 specifies four different methods, designated A to D, for the examination of colour.

The previously most employed method for assessment of water colour in water treatment plants, limnological surveys, etc. was based on the hexachloroplatinate scale. Methods C and D are harmonized with this traditional procedure.

Method A involves examination of apparent colour by visually observing a water sample in a bottle. This gives only preliminary information, for example for use in field work. Only the apparent colour can be reported.

Method B involves determination of the true colour of a water sample using optical apparatus and is applicable to raw and potable water and to industrial water of low colour. A subclause on interferences is included.

Method C involves determination of the true colour of a water sample using optical apparatus for comparison with hexachloroplatinate concentration at wavelength, λ = 410 nm. A subclause on interferences is included.

Method D involves determination of colour by visual comparison with hexachloroplatinate standard solutions and can be applied to raw and drinking water. A subclause on interferences is included.

Methods A and B are appropriate if the colour hue of the sample differs from the hue of the matching solution.

When stating the result, the procedure used (methods A to D) is also recorded.

Replaced standards (1)
NF EN ISO 7887
January 1995
Standard Cancelled
Water quality - Examination and determination of colour

Table of contents
  • Avant-propos
    iv
  • 1 Domaine d'application
    1
  • 2 Références normatives
    2
  • 3 Termes et définitions
    2
  • 4 Méthode A: examen visuel
    2
  • 5 Méthode B: détermination de la couleur vraie au moyen d'instruments optiques
    3
  • 6 Méthode C: détermination de la couleur vraie au moyen d'instruments optiques pour la détermination de l'absorbance à la longueur d'onde lambda = 410 nm
    6
  • 7 Méthode D: méthode visuelle de détermination de la couleur dans les eaux naturelles
    9
  • 8 Rapport d'essai
    11
  • Annexe A (informative) Contrôle de la qualité
    12
  • Annexe B (informative) Données relatives à la fidélité
    13
  • Bibliographie
    15
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