Standard ISO standard · ISO 7027-1:2016

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

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Standard ISO standard · ISO 7027-1:2016

Water quality -- Determination of turbidity -- Part 1: Quantitative methods
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Scope
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.

Subjects

Examination of physical properties of water (13.060.60)


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Standard ISO standard · ISO 7027-1:2016

Water quality -- Determination of turbidity -- Part 1: Quantitative methods
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Price: 760 SEK
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PDF

Price: 760 SEK
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Paper

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Product information

Language: English

Written by: ISO

International title:

Article no: STD-920595

Edition: 1

Approved: 6/9/2016

No of pages: 9

Replaces: ISO 7027:1999