M00001769
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ISO 13161 1st Edition, October 1, 2011 Water quality - Measurement of polonium 210 activity concentration in water by alpha spectrometry
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Availability date: 07/13/2021
Description / Abstract:
This International Standard specifies the measurement of 210Po
activity concentration by alpha spectrometry in all kinds of
natural waters.
The detection limit of this method depends on the volume of the
sample, the counting time, the background count rate and the
detection efficiency. In the case of drinking water, the analysis
is usually carried out on the raw sample, without filtration or
other pretreatment.
If suspended material has to be removed or analysed, filtration
at 0,45 μm is recommended. The analysis of the insoluble fraction
requires a mineralization step that is not covered by this
International Standard (see NF M 60-790-4[4]). In this
case, the measurement is made on the different phases obtained. The
final activity is the sum of all the measured activity
concentrations.