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ČSN EN ISO 19361 (404017)
Measurement of radioactivity - Determination of beta emitters activities - Test method using liquid scintillation counting
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STANDARD published on 1.8.2020
The information about the standard:
Designation standards: ČSN EN ISO 19361
Classification mark: 404017
Catalog number: 510355
Publication date standards: 1.8.2020
SKU: NS-1000841
The number of pages: 36
Approximate weight : 108 g (0.24 lbs)
Country: Czech technical standard
Category: Technical standards ČSN
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Annotation of standard text ČSN EN ISO 19361 (404017):
This document applies to liquid scintillation counters and requires the preparation of a scintillation source obtained by mixing the test sample and a scintillation cocktail. The test sample can be liquid (aqueous or organic), or solid (particles or filter or planchet). This document describes the conditions for measuring the activity of beta emitter radionuclides by liquid scintillation counting. The choice of the test method using liquid scintillation counting involves the consideration of the potential presence of other beta emitter radionuclides in the test sample. In this case, a specific sample treatment by separation or extraction is implemented to isolate the radionuclide of interest in order to avoid any interference with other beta-, alpha- and gamma-emitting radionuclides during the counting phase. This document is applicable to all types of liquid samples having an activity concentration ranging from a few Bq˙l-1 to 106 Bq˙l-1. For a liquid test sample, it is possible to dilute liquid test samples in order to obtain a solution having an activity compatible with the measuring instrument. For solid samples, the activity of the prepared scintillation source shall be compatible with the measuring instrument. The measurement range is related to the test method used: nature of test portion, preparation of the scintillator - test portion mixture, measuring assembly as well as to the presence of the co-existing activities due to interfering radionuclides. Test portion preparations (such as distillation for 3H measurement, or benzene synthesis for 14C measurement, etc.) are outside the scope of this document and are described in specific test methods using liquid scintillation
Preview of the standard ČSN EN ISO 19361 (404017)
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