Paulus L R, Walker D W, Thompson K C
State of Idaho INEEL Oversight Program, 900 N. Skyline, Suite C. Idaho Falls, ID 83402, USA.
Health Phys. 2003 Sep;85(3):348-56. doi: 10.1097/00004032-200309000-00011.
Atmospheric tritium monitoring involves the collection of tritiated water vapor by collecting atmospheric moisture from air that is drawn through a bed of desiccant material. This study is a comparison between molecular sieve and silica gel adsorbent media used for atmospheric moisture sampling conducted in the semi-arid climate of the Idaho National Engineering and Environmental Laboratory. Water vapor was collected simultaneously using two columns containing different desiccant materials (one column containing molecular sieve and the other containing silica gel). Data collected during air sampling periods were compared with meteorological data collected, and atmospheric moisture collection efficiencies were determined. Breakthrough of atmospheric moisture past the desiccant material was suspected with both media at elevated temperatures indicating that smaller sample volumes, lower volumetric flow rates, or longer adsorbent columns should be used during summer when ambient temperatures are elevated.
大气氚监测涉及通过从穿过干燥剂材料床的空气中收集大气水分来收集含氚水蒸气。本研究是在爱达荷国家工程和环境实验室的半干旱气候条件下，对用于大气水分采样的分子筛和硅胶吸附剂介质进行的比较。使用两个装有不同干燥剂材料的柱子（一个柱子装有分子筛，另一个装有硅胶）同时收集水蒸气。将空气采样期间收集的数据与收集的气象数据进行比较，并确定大气水分收集效率。在高温下，两种介质都怀疑有大气水分突破干燥剂材料，这表明在夏季环境温度升高时，应使用更小的样品体积、更低的体积流速或更长的吸附柱。
