ISO 19361:2017 放射性测量 β发射器活动的测定 试验用液体闪烁计数的试验方法

标准编号：ISO 19361:2017

中文名称：放射性测量 β发射器活动的测定 试验用液体闪烁计数的试验方法

英文名称：Measurement of radioactivity — Determination of beta emitters activities — Test method using liquid scintillation counting

发布日期：2017-08

标准范围

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 oncentration 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 .

标准预览图