小型化自动在线大气汞分析仪的开发及移动观测应用
发布时间：2018-12-09 18:06
【摘要】：基于金汞齐-冷原子荧光法开发了一套小型气态元素汞(TGM)在线监测仪,该仪器采用真空系统设计,体积小、重量轻,可实现无人值守自动运行,适用于车载移动观测.实验测试表明,仪器在典型时间分辨率4 min条件下的检出限能达到0.2 ng·m~(-3),优于商品化大气汞分析仪;且具有较高的精密度,标气重复实验相对偏差2%,工作曲线拟合优度R~20.999.将该仪器搭载于机动车内,对北京市四、五环路沿线气态元素汞进行了移动监测,测得四环路与五环路TGM平均浓度分别为2.25、2.63 ng·m~(-3).该仪器可提供高时空分辨率的大气汞浓度数据,可为气态元素汞的监测和污染控制提供技术支持.
[Abstract]:Based on the method of gold amalgam and cold atomic fluorescence, a small on-line monitoring instrument for gas elemental mercury (TGM) is developed. The instrument is designed by vacuum system, which is small in volume and light in weight. It can be operated automatically and unattended. It is suitable for vehicle-mounted mobile observation. The experimental results show that the detection limit of the instrument is 0.2 ng m ~ (-3) at a typical time resolution of 4 min, which is superior to that of commercial atmospheric mercury analyzer. It also has high precision, relative deviation of standard gas repeated experiment 2 and excellent fitting degree of working curve RV 20.999. In this paper, the gas elemental mercury along the fourth and Fifth Ring Road in Beijing was monitored by this instrument. The average concentration of TGM in the fourth Ring Road and the Fifth Ring Road was 2.25 ~ 2.63 ng m ~ (-3), respectively. The instrument can provide atmospheric mercury concentration data with high spatial and temporal resolution and provide technical support for monitoring and pollution control of gaseous elemental mercury.
【作者单位】： 环境模拟与污染控制国家重点联合实验室北京大学环境科学与工程学院;
【基金】：国家高技术研究发展计划(No.2014AA06A507)~~
【分类号】：X851
本文编号：2369809
[Abstract]:Based on the method of gold amalgam and cold atomic fluorescence, a small on-line monitoring instrument for gas elemental mercury (TGM) is developed. The instrument is designed by vacuum system, which is small in volume and light in weight. It can be operated automatically and unattended. It is suitable for vehicle-mounted mobile observation. The experimental results show that the detection limit of the instrument is 0.2 ng m ~ (-3) at a typical time resolution of 4 min, which is superior to that of commercial atmospheric mercury analyzer. It also has high precision, relative deviation of standard gas repeated experiment 2 and excellent fitting degree of working curve RV 20.999. In this paper, the gas elemental mercury along the fourth and Fifth Ring Road in Beijing was monitored by this instrument. The average concentration of TGM in the fourth Ring Road and the Fifth Ring Road was 2.25 ~ 2.63 ng m ~ (-3), respectively. The instrument can provide atmospheric mercury concentration data with high spatial and temporal resolution and provide technical support for monitoring and pollution control of gaseous elemental mercury.
【作者单位】： 环境模拟与污染控制国家重点联合实验室北京大学环境科学与工程学院;
【基金】：国家高技术研究发展计划(No.2014AA06A507)~~
【分类号】：X851
【相似文献】
相关重要报纸文章 前1条
1 记者 张晶;我国首个高时空分辨率碳同化反演系统发布[N];科技日报;2014年
相关硕士学位论文 前1条
1 陈哲夫;高时空分辨率湖泊湿地水体水质信息重构与变化检测[D];中南林业科技大学;2016年
，本文编号：2369809
本文链接：https://www.wllwen.com/shengtaihuanjingbaohulunwen/2369809.html
