高效固相微萃取管在环境水中痕量多环芳烃现场采样检测的应用  

On-site sampling and detection of trace polycyclic aromatic hydrocarbons in environmental water with highly efficient solid-phase microextraction tubes

作　　者：郑美杰 黄语 李秀娟 ZHENG Meijie;HUANG Yu;LI Xiujuan(College of Food Science and Technology/Ministry of Education Key Laboratory of Environment Correlative Dietology/Hubei Province Key Laboratory of Fruit&Vegetable Processing&Quality Control,Huazhong Agricultural University,Wuhan 430070,China)

机构地区：[1]华中农业大学食品科学技术学院/环境食品学教育部重点实验室/果蔬加工与品质调控湖北省重点实验室,武汉430070

出　　处：《华中农业大学学报》2025年第1期105-112,共8页Journal of Huazhong Agricultural University

基　　金：海南省科技厅重点研发计划项目(ZDYF2021XDNY304);湖北省农业科技创新项目(2019-620-000-001-31)。

摘　　要：为实现环境水中痕量污染物的现场采样,研制大容量固相微萃取(solid-phase microextraction,SPME)萃取管,构建现场SPME(on-site SPME)采样装置,以邻苯二甲酸酯和多环芳烃(polycyclic aromatic hydrocarbons,PAHs)为研究对象,采用气相色谱-氢火焰离子化检测器,评价萃取管和on-site SPME装置的性能。结果显示:萃取管性能稳定、重现性好,单根萃取管的萃取量为针式萃取头的13~31倍;采样装置组装灵活、携带方便;使用3根萃取管采样装置建立的on-site SPME方法对水中4种PAHs的检出限为0.01~0.04 ng/L,灵敏度较单根萃取管提高6~14倍,比针式萃取头提高36~53倍;不同加标水平下回收率为92.0%~115.7%,相对标准偏差为1.5%~13.1%。研究结果表明,该装置富集能力强、组装灵活、能够自动化采样,可以用于环境水中不同污染物的高效监测。A solid-phase microextraction(SPME)tube with large-capacity was developed and an on-site SPME sampling device was constructed to realize on-site sampling of trace pollutants in environmental water.Phthalates and polycyclic aromatic hydrocarbons(PAHs)were used to evaluate the performance of the SPME tubes and the on-site SPME device with gas chromatography-hydrogen flame ionization detector.The results showed that the extraction tube had stable performance and good reproducibility,and the ex-traction amount of a single extraction tube was 13-31 times that of a needle extraction head.The sampling device is flexible to be assembled and easy to be carried.The limit of detection of the on-site SPME meth-od established with a sampling device of three extraction tubes was 0.01-0.04 ng/L for four types of PAHs in water.The sensitivity of the on-site SPME was 6-14 times higher than that of a single extraction tube and 36-53 times higher than that of a needle extraction head.The rate of recovery at different spiked levels was 92.0%to 115.7%,with a relative standard deviation of 1.5%to 13.1%.It is indicated that the con-structed device has strong enrichment capacity,flexible assembly,and can be automated and used for effi-cient monitoring of different pollutants in environmental water.

关 键 词：现场采样 固相微萃取管 多环芳烃 气相色谱 水质监测 

分 类 号：O658[理学—分析化学]