顶空-固相微萃取-气相色谱-质谱联用法用于非目标性筛选饮用水中挥发性有机物  

Non-target Screening Analysis of Volatile Organic Compounds in Drinking Water by Headspace-Solid Phase Microextraction Gas Chromatography-Mass Spectrometry

作　　者：余明月 杨小秋[1] 樊蓉 郑禹康 史建波 郑琦[1] YU Ming-Yue;YANG Xiao-Qiu;FAN Rong;ZHENG Yu-Kang;SHI Jian-Bo;ZHENG Qi(Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education,School of Chemical and Environmental Engineering,Jianghan University,Wuhan 430056,China;Hubei Key Laboratory of Environmental and Health Effects Persistent Toxic Substances,Jianghan University,Wuhan 430056,China;Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,State Key Laboratory of Environmental Chemistry and Ecotoxicology,Beijing 10085,China)

机构地区：[1]江汉大学化学与环境工程学院光电化学材料与器件教育部重点实验室,武汉430056 [2]江汉大学持久性有毒污染物环境与健康危害湖北省重点实验室,武汉430056 [3]中国科学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,北京10085

出　　处：《分析化学》2020年第9期1228-1235,共8页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金项目(No.21677062)资助。

摘　　要：建立了顶空-固相微萃取-气相气谱-质谱联用(HS-SPME-GC-MS)非目标性筛选饮用水中挥发性有机物(VOCs)的分析方法。以萃取物的数量和峰面积对HS-SPME的工作参数进行优化,考察了4种萃取纤维(100μm PDMS、65μm PDMS/DVB、85μm PA和75μm CAR/PDMS)的最佳工作条件,包括恒温时间、萃取时间、萃取温度及盐效应等。对4种纤维萃取出的物质种类和油水分配比系数进行了比较,发现100μm PDMS的萃取物最少,且萃取物与其它纤维重复,可被另外3种萃取纤维代替。将优选出的3种萃取纤维对两种自来水水样(源水来自长江和汉江)进行非目标性筛选,对匹配度大于70%的物质进行了分析。结果表明,以汉江为源头的自来水水样中鉴定出35种物质,以长江为源头的自来水水样中鉴定出34种物质,两者共有物质18种。将两个水样中筛选的物质种类进行了比较,发现酯类物质最多,醛类物质和酚类物质次之。此方法不使用有机溶剂,对环境友好,可用于自来水中VOCs的筛选与分析。A non-target screening analytical method for volatile organic compounds(VOCs)in drinking water by headspace-solid phase microextraction(HS-SPME)gas chromatography-mass spectrometry(GC-MS)was established.The operating parameters of HS-SPME were optimized by the number of peaks and peak area of the extract.The optimum working conditions of four different extracted fibers(100μm PDMS,65μm PDMS/DVB,85μm PA and 75μm CAR/PDMS)were investigated,including incubation time,extraction time,extraction temperature,NaCl concentration and desorption time.Comparing the species extracted by the four fibers with the oil-water partition ratio coefficient,it was found that the number of substances extracted by 100μm PDMS was the least,and the extracted substances overlaped was repeated with other fibers.Therefore,it could be replaced by the three other extraction fibers.The three kinds of extracted fibers were selected for non-target screening of two kinds of tap water samples in Wuhan(the source water came from the Yangtze river and the Hanjiang river),and the substances with matching degree greater than 70%were selected for analysis.The results showed that 35 substances were identified from the tap water samples from the Han River,and 34 substances were identified from the tap water samples from the Yangtze River.The two had 18 common substances.By comparing the types of substances screened in the two water samples,it was found that the esters were the most abundant substances,followed by the aldehydes and phenols.Organic solvents was not used in the whole process,and the pollution caused by the solvent could avoided.The method was friendly to the environment,and could be used for screening and analysis of VOCs in tap water.

关 键 词：非目标性筛选 顶空固相微萃取 气相色谱-质谱联用 挥发性有机物 饮用水 

分 类 号：R123.1[医药卫生—环境卫生学] O657.63[医药卫生—公共卫生与预防医学]