Simultaneous determination of chlorinated aromatic hydrocarbons in fly ashes discharged from industrial thermal processes
Simultaneous determination of chlorinated aromatic hydrocarbons in fly ashes discharged from industrial thermal processes
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工业热力过程排放飞灰中氯代芳烃的同时测定
DOI：
10.1039/c7ay01545c
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发表时间：
2017-09-21
影响因子：
3.1
通讯作者：
Chen, Jiping
中科院分区：
文献类型：
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作者：
Fan, Yun;Zhang, Haijun;Chen, Jiping
氯代芳烃因其环境持久性、生物富集性和高毒性而受到越来越多的关注。建立了一种基于高分辨气相色谱/高分辨质谱同时测定粉煤灰中多氯二苯并二恶英和二苯并呋喃（PCDD/Fs）、多氯联苯（PCBs）、多氯萘（PCNs）和氯代多环芳烃（ClPAH）4种典型环芳烃的分析方法。高效的净化和分离程序与最佳的仪器条件相结合，提供了一个可靠的方法检测和定量的CAH。同时，13 C标记的标准品和氘代菲的加标实现了更准确的测量。经确定，该方法的检出限范围为：四氯对二恶英/氟同系物至八氯对二恶英/氟同系物0.1-13.4 pg g − 1，三氯联苯至七氯联苯同系物0.04-11.1 pg g−1，一氯化萘至八氯化萘同系物0.2-48.5 pg g−1，一氯芳烃和二氯芳烃3.5-9.5 pg g−1。除了PCN-2和PCN-6外，CAH的回收率良好（62-136%）。开发的分析方法进行了验证，然后用于确定从工业热过程中收集的飞灰中的CAH的水平。所有目标化合物均被检测到，且不同飞灰中CAH同系物的浓度差异很大。
Chlorinated aromatic hydrocarbons (CAHs) have received increasing attention because of their environmental persistence, bioaccumulation potential and high toxicity. In this study, an analytical methodology based on high-resolution gas chromatography/high-resolution mass spectrometry for the simultaneous determination of four typical kinds of CAHs including polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs), polychlorinated biphenyls (PCBs), polychlorinated naphthalenes (PCNs) and chlorinated polycyclic aromatic hydrocarbons (ClPAHs) in fly ash was developed. Highly effective cleanup and separation procedures combined with optimum instrumental conditions provided a reliable method for the detection and quantification of CAHs. Meanwhile, the spike of 13C-labeled standards and deuterated phenanthrene achieved more accurate measurement. The method detection limits were determined to be in the ranges of 0.1–13.4 pg g−1 for tetra- to octa-CDD/F congeners, 0.04–11.1 pg g−1 for tri- to hepta-CB congeners, 0.2–48.5 pg g−1 for mono- to octa-CN congeners and 3.5–9.5 pg g−1 for mono- and di-chlorinated aromatic hydrocarbons. Good recoveries of CAHs (62–136%) were achieved, except for PCN-2 and PCN-6. The developed analytical methodology was validated and then used to determine the levels of CAHs in fly ashes collected from industrial thermal processes. All the target compounds were detected and the CAH congener concentrations showed a wide variation in different fly ashes.