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使用相关的所有安全问题（如有）。用户有责任建立适当的安全和健康实践，并确保遵守任何国家监管条件。 重要事项——根据本文件进行的测试必须由具备相应资质的人员进行。ISO 13164的本部分规定了通过水样的直接伽马光谱法测量其短寿命衰变产物后，测定水样中氡-222活性浓度的试验方法（见附录a）。 氡-222放射性浓度可通过使用现有伽马射线仪器的本试验方法进行测量，对于1L试验样品，其范围从每升几贝克勒尔到每升几十万贝克勒尔。 本试验方法可成功用于饮用水样品。实验室负责确保本试验方法适用于未经试验基质的水样。 附录B给出了必要的计数条件，以满足饮用水监测所需的灵敏度。交叉引用:IEC 61151IEC 17025ISO 13164-1ISO 5667-1IEC 60973ISO 10703IEC 61452ISO 80000-10ISO 5667-3GUM:1995ISO 11929ISO 11665-5IEC指南98-3:2008 ISO 11665-1包含以下内容:勘误表，2020年3月

WARNING — Persons using this document should be familiar with normal laboratory practice. 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 ensure compliance with any national regulatory conditions. IMPORTANT — It is absolutely essential that tests conducted in accordance with this document be carried out by suitably qualified staff.This part of ISO 13164 specifies a test method for the determination of radon-222 activity concentration in a sample of water following the measurement of its short-lived decay products by direct gamma-spectrometry of the water sample (see Annex A). The radon-222 activity concentrations, which can be measured by this test method utilizing currently available gamma-ray instruments, range from a few becquerels per litre to several hundred thousand becquerels per litre for a 1 l test sample. This test method can be used successfully with drinking water samples. The laboratory is responsible for ensuring the validity of this test method for water samples of untested matrices. Annex B gives indication on the necessary counting conditions to meet the required sensitivity for drinking water monitoring.Cross References:IEC 61151IEC 17025ISO 13164-1ISO 5667-1IEC 60973ISO 10703IEC 61452ISO 80000-10ISO 5667-3GUM:1995ISO 11929ISO 11665-5IEC Guide 98-3:2008ISO 11665-1Incorporates the following:Corrigendum, March 2020