International Standard
ISO 7027-1:2016
Water quality — Determination of turbidity — Part 1: Quantitative methods
Reference number
ISO 7027-1:2016
Edition 1
2016-06
International Standard
Read sample
ISO 7027-1:2016
62801
Published (Edition 1, 2016)
This standard was last reviewed and confirmed in 2021. Therefore this version remains current.

ISO 7027-1:2016

ISO 7027-1:2016
62801
Language
Format
CHF 63
Convert Swiss francs (CHF) to your currency

Abstract

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.

General information

  •  : Published
     : 2016-06
    : International Standard confirmed [90.93]
  •  : 1
     : 9
  • ISO/TC 147/SC 2
    13.060.60 
  • RSS updates

Got a question?

Check out our FAQs

Customer care
+41 22 749 08 88

Opening hours:
Monday to Friday - 09:00-12:00, 14:00-17:00 (UTC+1)