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Norm

ISO 7027-1:2016

Issue date: 2016 06 09

Water quality — Determination of turbidity — Part 1: Quantitative methods

ISO 7027-1:2016 specifies two quantitative methods using optical turbidimeters or nephelometers for the determination of turbidity of water: a) nephelometry, procedure...
Valid
Publisher:
International Organization for Standardization
Format:
Digital | 9 Pages
Language:
English

ISO 7027-1:2016 specifies two quantitative methods using optical turbidimeters or nephelometers for the determination of turbidity of water:

a) nephelometry, procedure for measurement of diffuse radiation, applicable to water of low turbidity (for example drinking water);

b) turbidimetry, procedure for measurement of the attenuation of a radiant flux, more applicable to highly turbid waters (for example waste waters or other cloudy waters).

Turbidities measured according to the first method are presented as nephelometric turbidity units (NTU). The results typically range between <0,05 NTU and 400 NTU. Depending on the instrument design, it can also be applicable to waters of higher turbidity. There is numerical equivalence of the units NTU and formazin nephelometric unit (FNU).

Turbidity measured by the second method is expressed in formazin attenuation units (FAU), results typically range between 40 FAU and 4 000 FAU.

ISO 7027-1:2016
2016 06 09
Water quality — Determination of turbidity — Part 1: Quantitative methods
Norm
ISO 7027:1999
1999 12 16
Water quality — Determination of turbidity
Norm
ISO 7027:1990
1990 04 12
Water quality — Determination of turbidity
Norm
ISO 7027:1984
1984 07 01
Water quality — Determination of turbidity
Norm
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