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Timestamp: 2019-08-22 01:43:57
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Undersökning av vattens fysikaliska egenskaper | DRS
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prEN ISO 13164-1 - Water quality - Radon-222 - Part 1: General principles
Ämnesområden: Undersökning av vattens fysikaliska egenskaper
Kommittébeteckning: SIS/TK 424 (Kemiska vattenundersökningar)
Svarsdatum: den 25 aug 2019
This part of ISO 13164 gives general guidelines for sampling, packaging, and transporting of all kinds of
water samples, for the measurement of the activity concentration of radon-222.
The test methods fall into two categories:
a) direct measurement of the water sample without any transfer of phase (see ISO 13164-2);
b) indirect measurement involving the transfer of the radon-222 from the aqueous phase to another
phase (see ISO 13164-3).
The test methods can be applied either in the laboratory or on site.
The laboratory is responsible for ensuring the suitability of the test method for the water samples tested.
prEN ISO 13164-2 - Water quality - Radon-222 - Part 2: Test method using gamma-ray spectrometry
This part of ISO 13164 specifies a test method for the determination of radon-222 activity concentration
in a sample of water following the measurement of its short-lived decay products by direct gammaspectrometry
of the water sample (see Annex A).
The radon-222 activity concentrations, which can be measured by this test method utilizing currently
available gamma-ray instruments, range from a few becquerels per litre to several hundred thousand
becquerels per litre for a 1 l test sample.
This test method can be used successfully with drinking water samples. The laboratory is responsible
for ensuring the validity of this test method for water samples of untested matrices.
Annex B gives indication on the necessary counting conditions to meet the required sensitivity for
drinking water monitoring.
prEN ISO 13164-3 - Water quality - Radon-222 - Part 3: Test method using emanometry
in a sample of water following its transfer from the aqueous phase to the air phase by degassing and its
detection. It gives recommendations for rapid measurements performed within less than 1 h.
available instruments, range from 0,1 Bq l−1 to several hundred thousand becquerels per litre for a
100 ml test sample.
This test method is used successfully with drinking water samples. The laboratory is responsible for
ensuring the validity of this test method for water samples of untested matrices.
This test method can be applied on field sites or in the laboratory.
Annexes A and B give indications on the necessary counting conditions to meet the required sensitivity
for drinking water monitoring.
prEN ISO 13164-4 - Water quality - Radon-222 - Part 4: Test method using two-phase liquid scintillation counting
Ämnesområden: Undersökning av vattens fysikaliska egenskaper; Strålningsskydd; Strålningsmätning
This part of ISO 13164 describes a test method for the determination of radon-222 (222Rn) activity
concentration in non-saline waters by extraction and liquid scintillation counting.
available instruments, are at least above 0,5 Bq l−1 for a 10 ml test sample and a measuring time of 1 h.
This test method can be used successfully with drinking water samples and it is the responsibility of the
laboratory to ensure the validity of this test method for water samples of untested matrices.
Annex A gives indication on the necessary counting conditions to meet the required detection limits for
prEN ISO 13165-1 - Water quality - Radium-226 - Part 1: Test method using liquid scintillation counting
Ämnesområden: Undersökning av vattens fysikaliska egenskaper; Strålningsmätning
This part of ISO 13165 specifies the determination of radium-226 (226Ra) activity concentration in nonsaline
water samples by extraction of its daughter radon-222 (222Rn) and its measurement using liquid
Radium-226 activity concentrations which can be measured by this test method utilizing currently
available liquid scintillation counters goes down to 50 mBq l−1. This method is not applicable to the
measurement of other radium isotopes.
prEN ISO 13165-2 - Water quality - Radium-226 - Part 2: Test method using emanometry
This part of ISO 13165 specifies the determination of radium-226 (226Ra) activity concentration in all
types of water by emanometry.
The method specified is suitable for the determination of the soluble, suspended, and total 226Ra activity
concentration in all types of water with soluble 226Ra activity concentrations greater than 0,02 Bq l−1.
In water containing high activity concentrations of 228Th, interference from 220Rn decay products can
lead to overestimation of measured levels (see Figure A.2).
prEN ISO 13165-3 - Water quality - Radium-226 - Part 3: Test method using coprecipitation and gamma-spectrometry
This part of ISO 13165 specifies the determination of radium-226 (226Ra) activity concentration in all types of water by coprecipitation followed by gamma-spectrometry (see ISO 18589‑3).
The method described is suitable for determination of soluble 226Ra activity concentrations greater than 0,02 Bq l−1 using a sample volume of 1 l to 100 l of any water type.
For water samples smaller than a volume of 1 l, direct gamma-spectrometry can be performed following ISO 10703 with a higher detection limit.
NOTE This test method also allows other isotopes of radium, 223Ra, 224Ra, and 228Ra, to be determined.
Svarsdatum: den 20 sep 2019
Note Operational intervention levels (OILs) are derived from IAEA Safety Standards[13] or national authorities[5].