Webstore

RS ISO 7887: 2011
Water quality — Determination of color

Abstract

This International Standard 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 (Reference [1]). Methods C and D are harmonized
with this traditional procedure (References [2][3]).
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.

General Information

Code	Classification	Theme	Pages	Publisher	Availability
RS ISO 7887: 2011	ADOPTED ISO STANDARDS	Environment. Health protection. Safety	25	First Edition Re-Affirmed	Available