在线大气汞分析仪的开发及应用  

Design and Application of On-line Atmospheric Mercury Analyzer

作　　者：俞仲英[1] 曾立民[1] 张远航[1] 

机构地区：[1]北京大学环境模拟与污染控制国家重点联合实验室,北京100871

出　　处：《北京大学学报（自然科学版）》2006年第6期757-761,共5页Acta Scientiarum Naturalium Universitatis Pekinensis

基　　金：国家863项目(2005AA649030);国家973项目(2002CB410801)资助

摘　　要：作者基于金汞齐-冷原子荧光光谱法,自行开发用于分析环境空气中气态总汞(TGM)的在线监测仪器。该仪器操作时以净化后的环境空气作为载气,无需氩气或氮气。经测试当采样流量为1L/min,采样时间为10min时,检测限能达到0.2ng/m3;0.1ng汞蒸气连续测定结果表明其相对标准偏差<1.4%;工作曲线线性良好,r=0.9995。运用该仪器,在北京大学对TGM进行了为期3周的连续观测,得到TGM平均浓度为7.8ng/m3。Based on the method of gold amalgamation and CVAFS, the authors designed an instrument for continuously measuring total gaseous mereury in ambient air. The instrument operates with purified ambient air as earrier gas and does not require Argon or Nitrogen for detection. The sampling is run at about 1 L/min, with sampling times of 10 min. Under these conditions, a detection limit of about 0.2 ng/m^3 is achieved. It has been showed that the relative standard deviations for 0.1 ng mercury vapor samples is less than 1.4% , and the linearity of calibration curve is quite well with the correlation coefficient of 0.999 5. The instrument was used to eontinuously measure total gaseous mereury in the atmosphere at Peking University for about three weeks, observing an average concentration of TC, M about 7.8 ng/m^3 .

关 键 词：气态总汞 金汞齐 冷原子荧光法 测汞仪 

分 类 号：X851[环境科学与工程—环境工程]