This document specifies a method to determine radium-226 (226Ra) activity concentration in all types of water by coprecipitation followed by gamma-ray spectrometry (see ISO 20042[7]).
The method covers the measurement of soluble 226Ra activity concentrations greater than 0,002 Bq˙l-1 using a sample volume of up to 100 l of any water type.
For water samples with a volume of less than a volume of 1 l, direct gamma-ray spectrometry can be performed following ISO 10703 but with a higher detection limit. The typical detection limit for samples of 1 l to 5 l is in the range of 0,002 to 0,000 40 Bq˙l-1[8].
NOTE - This test method can be adapted to determine other naturally occurring isotopes of radium, such as 223Ra, 224Ra and 228Ra, if the respective ingrowth periods are taken into account.
Označení | ČSN EN ISO 13165-3 (757619) |
---|---|
Katalogové číslo | 520928 |
Cena | 340 Kč340 |
Datum schválení | 1. 5. 2025 |
Datum účinnosti | 1. 6. 2025 |
Jazyk | angličtina (obsahuje pouze anglický originál) |
Počet stran | 28 stran formátu A4 |
EAN kód | 8596135209286 |
Tato norma nahradila | ČSN EN ISO 13165-3 (757619) z srpna 2020 |
Dostupnost | skladem (tisk na počkání) |
ČSN EN ISO 13165-1 (757619)
Kvalita vod - Radium-226 - Část 1: Kapalinová scintilační metoda
ČSN EN ISO 13165-2 (757619)
Kvalita vod - Radium-226 - Část 2: Emanometrická metoda