本文件规定了测定非盐水中总β活性浓度的试验方法。该方法涵盖最大β能量约为0.3 MeV或更高的非挥发性放射性核素。低能量β发射体（如3H、228Ra、210Pb、14C、35S和241Pu）和一些气态或挥发性放射性核素（如氡和放射性碘）的测量可能不包括在使用本文件中描述的测试方法的总β定量中。 本试验方法适用于原水和饮用水的分析。应用范围取决于水中总可溶性盐的量和所用计数器的性能特征(背景计数率和计数效率)。 实验室有责任确保该方法适用于所测试的水样。

This document specifies a test method for the determination of gross beta activity concentration in non-saline waters. The method covers non-volatile radionuclides with maximum beta energies of approximately 0,3 MeV or higher. Measurement of low energy beta emitters (e.g. ³H, ²²⁸Ra, ²¹⁰Pb, ¹⁴C, ³⁵S and ²⁴¹Pu) and some gaseous or volatile radionuclides (e.g. radon and radioiodine) might not be included in the gross beta quantification using the test method described in this document. This test method is applicable to the analysis of raw and drinking waters. The range of application depends on the amount of total soluble salts in the water and on the performance characteristics (background count rate and counting efficiency) of the counter used. It is the laboratory's responsibility to ensure the suitability of this method for the water samples tested.