警告-使用ISO 13165本部分的人员应熟悉普通实验室 实践ISO 13165的本部分并不旨在解决所有安全问题（如有）， 与它的使用有关。用户有责任建立适当的安全和安保措施 并确保符合任何国家监管条件。 重要事项——按照本部分进行测试是绝对必要的 ISO 13165应由合格的员工执行。 ISO 13165的本部分规定了通过提取子体氡-222（222Rn）并使用液体进行测量来测定非盐水样品中的镭-226（226Ra）活性浓度 闪烁计数。 镭-226放射性浓度可通过本试验方法测量，目前使用 可用的液体闪烁计数器下降到50 mBq l–1。此方法不适用于 其他镭同位素的测量。交叉引用: IEC 17025ISO 80000-10ISO 5667-1ISO 3696 IEC指南98-3:2008 ISO 5667-3ASTM D5072ISO 11929ISO 8258包含以下内容:勘误表，2020年3月

WARNING — Persons using this part of ISO 13165 should be familiar with normal laboratory practice. This part of ISO 13165 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 ensure compliance with any national regulatory conditions. IMPORTANT — It is absolutely essential that tests conducted in accordance with this part of ISO 13165 be carried out by suitably qualified staff.This part of ISO 13165 specifies the determination of radium-226 (226Ra) activity concentration in non-saline water samples by extraction of its daughter radon-222 (222Rn) and its measurement using liquid scintillation counting. Radium-226 activity concentrations which can be measured by this test method utilizing currently available liquid scintillation counters goes down to 50 mBq l–1. This method is not applicable to the measurement of other radium isotopes.Cross References:IEC 17025ISO 80000-10ISO 5667-1ISO 3696IEC Guide 98-3:2008ISO 5667-3ASTM D5072ISO 11929ISO 8258Incorporates the following:Corrigendum, March 2020