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Standard ČSN EN ISO 10703 1.2.2022 preview

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ČSN EN ISO 10703 (757630)

Water quality - Gamma-ray emitting radionuclides - Test method using high resolution gamma-ray spectrometry

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STANDARD published on 1.2.2022


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The information about the standard:

Designation standards: ČSN EN ISO 10703
Classification mark: 757630
Catalog number: 514083
Publication date standards: 1.2.2022
SKU: NS-1048561
The number of pages: 32
Approximate weight : 96 g (0.21 lbs)
Country: Czech technical standard
Category: Technical standards ČSN

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Examination of physical properties of waterRadiation measurements

Annotation of standard text ČSN EN ISO 10703 (757630):

Tento dokument specifikuje metodu pro předúpravu a přípravu vzorků vody a pro stanovení objemové aktivity různých radionuklidů emitujících záření gama s energiemi mezi 40 keV a 2 MeV spektrometrií záření gama obecně použitelnou zkušební metodou popsanou v ISO 20042. Metoda je použitelná pro zkoušené vzorky pitné vody, dešťové vody, povrchové a podzemní vody i pro chladicí vody, průmyslové vody, domovní a průmyslové odpadní vody po náležitém vzorkování, manipulaci se vzorky a přípravě zkušebního vzorku (filtraci, pokud je nezbytná a se zohledněním množství rozpuštěných látek ve vodě). Tato metoda je použitelná pouze pro homogenní vzorky nebo vzorky, které jsou homogenní po filtraci, provedené ve vhodnou dobu. Nejnižší mez, kterou lze měřit bez koncentrování vzorku nebo s použitím pouze pasivního stínění detekčního systému, je přibližně 5˙10-2 Bq/l, např. pro 137Cs1). Horní mez aktivity odpovídá mrtvé době 10 %. Smí být použity delší mrtvé doby, ale je potřebný důkaz o přesnosti korekce mrtvé doby

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