标准摘要
[中文适用范围]： 本文件规定了通过镭的化学分离和液体闪烁计数测量来测定饮用水样品中镭 226 (226Ra) 和镭 228 (228Ra) 的活度浓度。 对于 0.5 kg 的样品质量，可以通过该测试方法利用当前可用的液体闪烁计数器测量 226Ra 和 228Ra 的质量活度浓度，226Ra 降至 0.01 Bq/kg，228Ra 降至 0.06 Bq/kg，低背景液体闪烁计数器的计数时间为 1 小时[8]。 该测试方法可用于紧急情况下饮用水被镭污染的快速检测。 [外文原描述]： This document specifies the determination of radium-226 ( 226 Ra) and radium-228 ( 228 Ra) activity concentrations in drinking water samples by chemical separation of radium and its measurement using liquid scintillation counting. Massic activity concentrations of 226 Ra and 228 Ra which can be measured by this test method utilizing currently available liquid scintillation counters go down to 0,01 Bq/kg for 226 Ra and 0,06 Bq/kg for 228 Ra for a 0,5 kg sample mass and a 1 h counting time in a low background liquid scintillation counter [8] . The test method can be used for the fast detection of contamination of drinking water by radium in emergency situations.
英文名称Water quality — Radium 226 and Radium 228 — Test method using liquid scintillation counting