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大气中痕量持久性有机污染物年均值的测定
引用本文:杨文,赵全升,陈大舟,刘文杰,刘咸德,郑晓燕,戴天有.大气中痕量持久性有机污染物年均值的测定[J].环境监测管理与技术,2008,20(6):16-21.
作者姓名:杨文  赵全升  陈大舟  刘文杰  刘咸德  郑晓燕  戴天有
作者单位:1. 青岛大学,山东,青岛,266071;中国环境科学研究院,北京,100012
2. 青岛大学,山东,青岛,266071
3. 国家标准物质研究中心,北京,100132
4. 中国环境科学研究院,北京,100012
5. 中科院生态环境研究中心,环境化学与生态毒理学国家重点实验室,北京,100085
基金项目:国家重点基础研究发展计划(973计划)  
摘    要:采用以XAD-2树脂为吸附介质的大气被动采样器,在四川卧龙自然保护区设置6个采样点,进行了为期2年(2005年-2007年)的环境大气样品采集。用气相色谱-高分辨质谱方法对HCB,HCHs,DDTs和PCBs测定。结果表明,平行样品的重现性良好,平均相对偏差为9%。POPs检测下限的范围为1.0pg/m^3-5.9pg/m^3。2年的年均值数据表现出较好的一致性和规律性。以XAD-2树脂为吸附介质的大气被动采样器能够便利地采集进而测定半年或一年污染物的平均浓度,可以经济、有效地获得大气中痕量POPs的年均值。ρ(α—HCH)/ρ(γ-HCH)从成都到卧龙的上升的趋势反映的是传输过程中HCH的降解;而卧龙地区跨年度数据所反映出的ρ(α—HCH)/ρ(γ-HCH)下降趋势,可以归因于林丹的使用。

关 键 词:大气被动采样  有机氯污染物  气相色谱-高分辨质谱  大气环境  卧龙自然保护区

Determ ination of Annual Average of Trace PersistentOrganic Pollutantsin Air
YANG Wen,ZHAO Quan-sheng,CHEN Da-zhou,LIU Wen-jie,LIU Xian-de,ZHENG Xiao-yan,DAI Tian-you.Determ ination of Annual Average of Trace PersistentOrganic Pollutantsin Air[J].The Administration and Technique of Environmental Monitoring,2008,20(6):16-21.
Authors:YANG Wen  ZHAO Quan-sheng  CHEN Da-zhou  LIU Wen-jie  LIU Xian-de  ZHENG Xiao-yan  DAI Tian-you
Institution:YANG Wen, ZHAO Quan-sheng ,CHEN Da-zhou, LIU Wen-jie , LIU Xian-de, ZHENG Xiao-yan, DAI Tian-you (1. Qingdao University, Qingdao, Shandong 266071, China; 2. Chinese Research Academy of Environmental Sciences, Bering 100012, China; 3. National Research Centre for Certified Reference Materials, Beijing 100132, China; 4. State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China)
Abstract:In this paper using XAD-2 resin based passive air samplers (PAS), we installed six sampling sites in Wolong Natural Reserve. Annual averages of persistent organic pollutants in air were determined in 2005--2007. Organochlorine compounds such as HCB, HCHs, DDTs and PCBs were determined by the gas chromatography-high resolution mass spectrometry method. The relative difference between PAS duplicates was usually less than 9% and acceptable. The detection limits for POPs fell in the range of 1.0 pg/m^3 to 5.9 pg/m^3. Annual averages of two consecutive years show good consistence and regularity. With the XAD-2 resin based passive air samplers; it is feasible to determine cost-effectively the average concentrations of POPs fur one year or half a year. The increasing trend of ρ(α-HCH)/ρ(γ-HCH) ratio, from Chengdu plain to Wolong mountain, reflects the degradation of HCH in transport; and the decline of ρ(α-HCH)/ρ(γ-HCH) ratio over two consecutive years could be attributed to the use of lindane in Chengdu plain.
Keywords:Passive air sampling  Organochlorine pollutants  Gas chromatography-high resolution mass spectrometry  Atmospheric environment  Wolong naturalreserve
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