作者：杨坤红1, 谭清2
作者单位：1. 成都市环境保护科学研究院, 四川 成都 610072;
2. 成都市环境监测中心站, 四川 成都 610066
关键词：汞;大气颗粒物;固相萃取;电感耦合等离子体质谱;无机汞;甲基汞
摘要：
大气中的汞有不同的存在形态，对环境的影响程度不同，目前对大气颗粒中汞的测定研究及其形态分析尚非常薄弱。该文尝试将顶空-固相微萃取与气相色谱-电感耦合等离子体质谱法联用测定大气颗粒物中的无机汞和甲基汞。该方法对甲基汞和无机汞的检出限分别为2 ng/L（0.02 ng）和0.5 ng/L（0.005 ng），测定下限分别为8 ng/L（0.08 ng）和2 ng/L（0.02 ng）。可实现大气颗粒物中无机汞的准确测定，也可以用于甲基汞污染情况下污染源废气或污染区大气颗粒物中甲基汞的监测。
Determination of inorganic mercury and methylmercury in atmospheric particulates by headspace-solid phase microextraction-gas chromatography-inductively coupled plasma mass spectrometry
YANG Kunhong1, TAN Qing2
1. Chengdu Academy of Environmental Sciences, Chengdu 610072, China;
2. Chengdu Environment Monitoring Centre, Chengdu 610066, China
Abstract: There are different forms of mercury in the atmosphere, which have different impacts on the environment. At present, the research of mercury determination in atmospheric particulates and its speciation analysis were very limited. In this paper, headspace-solid phase microextraction (HS-SPME) and gas chromatography-inductively coupled plasma mass spectrometry (GC-ICP-MS) were used to detect inorganic mercury and methylmercury in atmospheric particulates. The detection limits of methylmercury and inorganic mercury were 2 ng/L (0.02 ng) and 0.5 ng/L (0.005 ng), respectively, and the lower limits of determination was 8 ng/L (0.08 ng) and 2 ng/L (0.02 ng), respectively, which can be used for the accurate determination of inorganic mercury in atmospheric particulates, as well as for the monitoring of methylmercury in polluted gas or atmospheric particulates in methylmercury polluted area.
Keywords: mercury;atmospheric particulates;solid phase microextraction;inductively coupled plasma mass spectrometry;inorganic mercury;methylmercury
2019, 45(8):75-79,105 收稿日期: 2019-04-09;收到修改稿日期: 2019-05-21
基金项目:
作者简介: 杨坤红(1975-),男,重庆市人,高级工程师,主要从事生态环境保护监测及科研工作
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