大气和地下水中SF6测试技术  

An Analytical Technique for the Measurement of SF6 in Atmosphere and Groundwater

作　　者：张俊刚[1] 李晶晶[1] 周爱国[1] 刘存富[1] 

机构地区：[1]中国地质大学环境学院,湖北武汉430074

出　　处：《地球学报》2005年第B09期293-295,共3页Acta Geoscientica Sinica

基　　金：本文由国家自然科学基金项目（编号：40372112）资助.

摘　　要：SF6是一种无色、无嗅、无毒、不易燃的惰性气体，具有良好的绝缘性、灭弧性和散热性。由于SF6具有化学惰性、大气圈和水圈中本底浓度低、检测灵敏度高等优点，它成为一种较为理想的大气、水文示踪剂。另外，在年轻地下水测年领域，SF6法已经逐渐有取代其他测年工具（^3H法、CFCs法、^3H／^3He法）的趋势，特别适合研究1970年以后补给水的年龄。本文基于气相色谱仪和电子捕获检测器，设计了一套SF6提取制样分析系统，发展了SF6测试技术。SF6 is a colorless, odorless, nontoxic, and nonflammable inert gas with excellent electric insulating and arc-quenching properties. The attraction of SF6 as an ideal atmospheric and hydrologic tracer is enhanced by its chemical and biological inertness and its low concentration in atmosphere and hydrosphere. Also, in the field of young groundwater dating, SF6 shows a gradual trend to replace other dating tools such as ^3H, CFCs and ^3H/^3He. It is especially suitable for dating the water recharged since 1970. The high sensitivity of the electron capture detector to SF6 has led the authors to develop an analytical technique for the measurement of SF6.

关 键 词：SF6 测试技术 气相色谱法 大气圈 地下水 电子捕获检测器 ^3HE 检测灵敏度 气相色谱仪 惰性气体 

分 类 号：P46[天文地球—大气科学及气象学] TM213[一般工业技术—材料科学与工程]