标准摘要
[中文适用范围]： 该文件规定了一种通过共沉淀后 followed by gamma-ray spectrometry（参见ISO 20042[7]）确定所有类型水中镭-226（226Ra）活度浓度的方法。该方法涵盖了使用最多100升任何类型的水样来测量大于0.002 Bq·l−1的可溶性226Ra活度浓度。对于体积小于1升的水样，可以按照ISO 10703进行直接伽马射线光谱分析，但检测限较高。1升至5升样品的典型检测限在0.002到0.00040 Bq·l−1之间[8]。注意 如果考虑到各自的增殖期，此测试方法可以适应来测定其他天然存在的镭同位素，如223Ra、224Ra和228Ra。 [外文原描述]： This document specifies a method to determine radium-226 ( 226 Ra) 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 226 Ra 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 223 Ra, 224 Ra and 228 Ra, if the respective ingrowth periods are taken into account.
英文名称Water quality — Radium-226 — Part 3: Test method using coprecipitation and gamma-ray spectrometry