警告-使用本文件的人员应熟悉正常的实验室实践。 本文件并非旨在解决与其相关的所有安全问题（如有） 使用用户有责任建立适当的安全和健康实践，并 确定任何其他限制的适用性。 重要-根据本文件进行的测试必须 由经过适当培训的员工执行。本文件规定了通过镭的化学分离及其使用液体闪烁计数的测量来测定饮用水样中的镭226（226Ra）和镭228（228Ra）活性浓度。 226Ra和228Ra的质量放射性浓度可通过使用当前可用液体闪烁计数器的本试验方法测量，对于226Ra，其质量放射性浓度降至0.01Bq/kg；对于0.5kg样品质量，其质量放射性浓度降至0.06Bq/kg；对于228Ra，其在低背景液体闪烁计数器中的计数时间为1h[8]。 该试验方法可用于快速检测饮用水中镭的污染 紧急情况。交叉引用:ISO 80000-10ISO 5667-3ISO 5667-1ISO/IEC指南98-3ISO 3696ISO/IEC 17025:2017IAEA TRS-476ISO 5667-20ISO 21748IAEA TECDOC-1788ISO 5725-1IAEA AQ-39ISO 5725-4ISO 11929（所有部分）IAEA GSG-2ISO 5725- 2ISO 7870-2:2013购买时可用的所有当前修订均包含在本文件的购买中。

WARNING — Persons using this document should be familiar with normal laboratory practices. This document does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user to establish appropriate safety and health practices and to determine the applicability of any other restrictions. IMPORTANT— It is absolutely essential that tests conducted according to this document be carried out by suitably trained staff.This document specifies the determination of radium-226 (226Ra) and radium-228 (228Ra) activity concentrations in drinking water samples by chemical separation of radium and its measurement using liquid scintillation counting. Massic activity concentrations of226Ra and228Ra which can be measured by this test method utilizing currently available liquid scintillation counters go down to 0,01 Bq/kg for226Ra and 0,06 Bq/kg for228Ra 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.Cross References:ISO 80000-10ISO 5667-3ISO 5667-1ISO/IEC Guide 98-3ISO 3696ISO/IEC 17025:2017IAEA TRS-476ISO 5667-20ISO 21748IAEA TECDOC-1788ISO 5725-1IAEA AQ-39ISO 5725-4ISO 11929 (all parts)IAEA GSG-2ISO 5725-2ISO 7870-2:2013All current amendments available at time of purchase are included with the purchase of this document.