水质

[中文适用范围]： 本文件规定了一种通过液体闪烁计数同时测量水样中 3H 和 14C 的方法，该计数源是将水样与亲水闪烁混合物混合而获得的。由于测试样品中可能存在干扰放射性核素，因此本文件中介绍的方法被视为筛选方法。但是，如果已知样品不含干扰放射性核素，则可以定量测量 3H 和 14C。该方法可用于任何类型的环境研究或监测。该方法适用于供水/饮用水、雨水、地表水和地下水、海水以及冷却水、工业用水、生活用水和工业废水的测试样品，其活度浓度范围为 5 Bq∙l-1 至 106 Bq∙l-1（液体闪烁计数器直接计数的上限）。对于更高的活度浓度，可以稀释样品以获得在此范围内的测试样品。 [外文原描述]： This document specifies a method for the simultaneous measurement of 3 H and 14 C in water samples by liquid scintillation counting of a source obtained by mixing the water sample with a hydrophilic scintillation cocktail. The method presented in this document is considered a screening method because of the potential presence of interfering radionuclides in the test sample. However, if the sample is known to be free of interfering radionuclides then 3 H and 14 C can be measured quantitatively. The method can be used for any type of environmental study or monitoring. This method is applicable to test samples of supply/drinking water, rainwater, surface and ground water, marine water, as well as cooling water, industrial water, domestic, and industrial wastewater having an activity concentration ranging from 5 Bq∙l -1 to 10 6 Bq∙l -1 (upper limit of the liquid scintillation counters for direct counting). For higher activity concentrations, the sample can be diluted to obtain a test sample within this range.