Congener-specific determination of ultratrace levels of chlorinated and brominated polycyclic aromatic hydrocarbons in atmosphere and industrial stack gas by isotopic dilution gas chromatography/high resolution mass spectrometry method
Congener-specific determination of ultratrace levels of chlorinated and brominated polycyclic aromatic hydrocarbons in atmosphere and industrial stack gas by isotopic dilution gas chromatography/high resolution mass spectrometry method
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同位素稀释气相色谱/高分辨率质谱法对大气和工业烟气中超痕量氯化和溴化多环芳烃进行同类物特异性测定
DOI：
10.1016/j.chroma.2017.06.022
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发表时间：
2017-08-04
影响因子：
4.1
通讯作者：
Xu, Yang
中科院分区：
文献类型：
--
作者：
Jin, Rong;Liu, Guorui;Xu, Yang
同位素稀释气相色谱与高分辨率质谱（GC/FIRMS）相结合，在环境基质中复杂持久性有机污染物（POPs）的同源特异性超痕量分析的准确性方面具有压倒性的优势。然而，尚未建立以C-13标记同系物为内标分析氯化和溴化多环芳烃（CI-PAHs和Br-PAHs）的同位素稀释GC/HRMS方法。本研究采用同位素稀释气相色谱/HRMS技术，建立了垃圾焚烧炉大气和烟气样品中38种同系物CI-PAHs和Br-PAHs的鉴定和定量方法。GC/HRMS法对CI-PAH同系物的检出限为0.2 ~ 1.8 pg，对Br-PAH同系物的检出限为0.7 ~ 2.7 pg，比GC/四极杆质谱法低3个数量级。这种新方法也是第一个能够测定含有相同分子骨架和氯或溴取代数的同系物的CI-PAH和Br-PAH同源物的方法。在检测到的同系物中，大气和垃圾焚烧炉排放的烟囱气体中富含的7种CI-PAH同系物和13种Br-PAH同系物首次在实际样品中检测到，并使用已建立的同位素稀释GC/FIRMS方法进行了报道。同位素稀释气相色谱/HRMS的发展对于更好地研究CI-PAHs和Br-PAHs的环境行为和健康风险具有重要意义。(C) 2017 Elsevier B.V.版权所有
Isotopic dilution gas chromatography combined with high resolution mass spectrometry (GC/FIRMS) has overwhelming advantages with respect to the accuracy of congener-specific ultratrace analysis of complex persistent organic pollutants (POPs) in environmental matrices. However, an isotopic dilution GC/HRMS method for analysis of chlorinated and brominated polycyclic aromatic hydrocarbons (CI-PAHs and Br-PAHs) using C-13 -labelled congeners as internal standards has not been established. In this study, a method for identification and quantification of 38 congeners of CI-PAHs and Br-PAHs in atmosphere and stack gas samples from waste incinerators was developed using the isotopic dilution GC/HRMS technique. The instrumental detection limits of the GC/HRMS method ranged from 0.2 pg to 1.8 pg for CI-PAH congeners, and 0.7 pg to 2.7 pg for Br-PAH congeners, which were about three orders of magnitude lower than those of the GC/quadrupole MS method. This new method developed was also the first to enable determination of CI-PAH and Br-PAH homologs comprising congeners with the same molecular skeleton and chlorine or bromine substitution numbers. Among the detected congeners, seven CI-PAH congeners and thirteen Br-PAH congeners that were abundant in the atmosphere and stack gases released from waste incinerators were firstly detected in real samples and reported using the established isotopic dilution GC/FIRMS method. The developed isotopic dilution GC/HRMS is significant and needed for better studying the environmental behavior and health risk of CI-PAHs and Br-PAHs. (C) 2017 Elsevier B.V. All rights reserved.