ISO 7887:2011

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Water quality — Examination and determination of colour

Published By	Publication Date	Number of Pages
ISO	2011-12	20

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Categories: 13.060.60 - Examination of physical properties of water, ISO

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Description

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, ? = 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.

Additional information

Published Code	ISO
Published By	International Organization for Standardization
Publication Date	2011-12
Pages Count	20
Language	France
Edition	3
File Size	337.9 KB
ICS Codes	13.060.60 - Examination of physical properties of water

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ISO 7887:2011

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