ISO 7027-1:2016 - $68.00   BUY NOW

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

ISO 7027-1:2016 Publication Description:

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.

International Classification for Standards (ICS)

ICS Classification Field ICS Field Sub-Group and Number
ICS-13-Environment ICS Examination-Water Physical Properties (13.060.60)

ICS Related Standards

Cart Document Number Document Title
$138.00 ISO 10703:2007 Water quality - Determination of the activity concentration of radionuclides - Method by high resolution gamma-ray spectrometry
$103.00 ISO 10704:2009 Water quality - Measurement of gross alpha and gross beta activity in non-saline water - Thin source deposit method
$68.00 ISO 11704:2010 Water quality - Measurement of gross alpha and beta activity concentration in non-saline water - Liquid scintillation counting method
$45.00 ISO 11923:1997 Water quality - Determination of suspended solids by filtration through glass-fibre filters
$185.00 ISO 13160:2012 Water quality - Strontium 90 and strontium 89 - Test methods using liquid scintillation counting or proportional counting
$103.00 ISO 13161:2011 Water quality - Measurement of polonium 210 activity concentration in water by alpha spectrometry
$138.00 ISO 13162:2011 Water quality - Determination of carbon 14 activity - Liquid scintillation counting method
$103.00 ISO 13163:2013 Water quality - Lead-210 - Test method using liquid scintillation counting
$138.00 ISO 13164-1:2013 Water quality - Radon-222 - Part 1: General principles
$103.00 ISO 13164-2:2013 Water quality - Radon-222 - Part 2: Test method using gamma-ray spectrometry
$138.00 ISO 13164-3:2013 Water quality - Radon-222 - Part 3: Test method using emanometry
$68.00 ISO 13164-4:2015 Water quality - Radon-222 - Part 4: Test method using two-phase liquid scintillation counting
$103.00 ISO 13165-1:2013 Water quality - Radium-226 - Part 1: Test method using liquid scintillation counting
$103.00 ISO 13165-2:2014 Water quality - Radium-226 - Part 2: Test method using emanometry
$103.00 ISO 13165-3:2016 Water quality - Radium-226 - Part 3: Test method using coprecipitation and gamma-spectrometry
$103.00 ISO 13166:2014 Water quality - Uranium isotopes - Test method using alpha-spectrometry
$138.00 ISO 13167:2015 Water quality - Plutonium, americium, curium and neptunium - Test method using alpha spectrometry
$103.00 ISO 13168:2015 Water quality - Simultaneous determination of tritium and carbon 14 activities - Test method using liquid scintillation counting
$138.00 ISO 21338:2010 Water quality - Kinetic determination of the inhibitory effects of sediment, other solids and coloured samples on the light emission of Vibrio fischeri (kinetic luminescent bacteria test)
$68.00 ISO 7027:1999 Water quality -- Determination of turbidity
$103.00 ISO 7887:2011 Water quality - Examination and determination of colour
$45.00 ISO 7888:1985 Water quality - Determination of electrical conductivity
$68.00 ISO 9696:2007 Water quality - Measurement of gross alpha activity in non-saline water - Thick source method
$68.00 ISO 9697:2015 Water quality - Gross beta activity in non-saline water - Test method using thick source
$88.00 ISO 9697:2008 Water quality - Measurement of gross beta activity in non-saline water - Thick source method
$88.00 ISO 9697:2008 Water quality - Measurement of gross beta activity in non-saline water - Thick source method
$138.00 ISO 9698:2010 Water quality - Determination of tritium activity concentration - Liquid scintillation counting method
$103.00 ISO 9696:2017 Water quality - Gross alpha activity - Test method using thick source