Undersökning av vattens fysikaliska egenskaper

Kommittébeteckning: SIS/TK 424 (Kemiska vattenundersökningar)
Källa: CEN
Svarsdatum: den 25 aug 2019
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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.

Kommittébeteckning: SIS/TK 424 (Kemiska vattenundersökningar)
Källa: CEN
Svarsdatum: den 25 aug 2019
Se merSe mindre
 

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.

Kommittébeteckning: SIS/TK 424 (Kemiska vattenundersökningar)
Källa: CEN
Svarsdatum: den 25 aug 2019
Se merSe mindre
 

This part of ISO 13164 specifies a test method for the determination of radon-222 activity concentration

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.

The radon-222 activity concentrations, which can be measured by this test method utilizing currently

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.

Kommittébeteckning: SIS/TK 424 (Kemiska vattenundersökningar)
Källa: CEN
Svarsdatum: den 25 aug 2019
Se merSe mindre
 

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.

The radon-222 activity concentrations, which can be measured by this test method utilizing currently

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

drinking water monitoring.

Kommittébeteckning: SIS/TK 424 (Kemiska vattenundersökningar)
Källa: CEN
Svarsdatum: den 25 aug 2019
Se merSe mindre
 

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

scintillation counting.

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.

Kommittébeteckning: SIS/TK 424 (Kemiska vattenundersökningar)
Källa: CEN
Svarsdatum: den 25 aug 2019
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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).