标准摘要
[中文适用范围]： 本文件规定了直接在测试样品上或在化学分离后通过液体闪烁计数 (LSC) 测量所有类型水样中 14C 活度浓度的方法。 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、生活和工业废水样品的测试。 检测限取决于样品体积、使用的仪器、样品计数时间、背景计数率、检测效率和化学回收率。 本文所述的方法，利用现有的液体闪烁计数器和合适的技术条件，检测限低至1 Bq∙l−1，低于WHO饮用水安全饮用标准（100 Bq∙l） -1）。 无需任何样品稀释即可测量高达 106 Bq∙l-1 的 14C 活性浓度。 用户有责任确保该测试方法对于测试的水样的有效性。 [外文原描述]： This document specifies a method for the measurement of 14 C activity concentration in all types of water samples by liquid scintillation counting (LSC) either directly on the test sample or following a chemical separation. The 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. The detection limit depends on the sample volume, the instrument used, the sample counting time, the background count rate, the detection efficiency and the chemical recovery. The method described in this document, using currently available liquid scintillation counters and suitable technical conditions, has a detection limit as low as 1 Bq∙l −1 , which is lower than the WHO criteria for safe consumption of drinking water (100 Bq·l -1 ). 14 C activity concentrations can be measured up to 10 6 Bq∙l -1 without any sample dilution. It is the user’s responsibility to ensure the validity of this test method for the water samples tested.
英文名称Water quality — Carbon 14 — Test method using liquid scintillation counting