DB37/T 3457-2018 in English

本标准规定了测定环境空气中氚化水蒸气的液体闪烁计数法。
本标准适用于环境空气中氚化水蒸气的测定。
本方法的探测下限取决于：环境温度、相对湿度、采样效率、仪器计数效率、仪器本底计数率、测量时间等。典型条件下，冷凝采样的探测下限可达15 mBq/m
3；干燥剂吸附采样的探测下限可达4 mBq/m
3。

Scope

This standard specifies the liquid scintillation counting method for the determination of tritiated water vapor in ambient air. This standard is applicable to the determination of tritiated water vapor in ambient air. The detection limit of this method depends on: ambient temperature, relative humidity, sampling efficiency, instrument counting efficiency, instrument background counting rate, measurement time, etc. Under typical conditions, the detection limit of condensation sampling can reach 15 mBq/m³; the detection limit of desiccant adsorption sampling can reach 4 mBq/m³.