GSO ISO 7027:2013
Gulf Standard
Current Edition
·
Approved on
01 April 2013
·
Water quality - Determination of turbidity
GSO ISO 7027:2013 Files
English
10 Pages
Current Edition
Reference Language
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GSO ISO 7027:2013 Scope
This International Standard specifies four methods for the determination of turbidity of water.
Two semiquantitative methods, employed for example in field work, are specified:
a) measurement of turbidity using the transparency testing tube (applicable to pure and lightly polluted water);
b) measurement of turbidity using the transparency testing disk (especially applicable to surface water).
Two quantitative methods, using optical turbidimeters, are specified:
c) measurement of diffuse radiation, applicable to water of low turbidity (for example drinking water);
Turbidity measured by this method is expressed in formazin nephelometric units (FNU); results typically range between 0 FNU and 40 FNU. Depending on the instrument design, it may also be applicable to waters of higher turbidity.
d) measurement of the attenuation of a radiant flux, more applicable to highly turbid waters (for example waste or polluted waters).
Turbidity measured by this method is expressed in formazin attenuation units (FAU); results typically range between 40 FAU and 4000 FAU.
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