ISO 7027:1999 Water quality - Determination of turbidity
- Abbreviation
- ISO 7027:1999
- Valid from
- 16/12/1999
- Information provider
- Standards New Zealand,
- Author
- International Organization for Standardization
- Information type
- ISO Standard,
- Format
- PDF, HARD COPY,
Description
This standard specifies four methods for the determination of the turbidity of water.
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.
This resource is cited by:
ISO 7027:1999 Water quality - Determination of turbidity
This document is CITED BY:
-
AS/NZS 4020:2005
ISO 7027:1999 is cited by AS/NZS 4020:2005 Testing of products for use in contact with drinking water