M00020417
New product
ISO FDIS 7027-1 2016 Edition, January 14, 2016 WATER QUALITY - DETERMINATION OF TURBIDITY - PART 1: QUANTITATIVE METHODS
In stock
Warning: Last items in stock!
Availability date: 07/14/2021
Description / Abstract:
This part of ISO 7027 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) turbidity, 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 this 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