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首页> 外文期刊>RSC Advances >Pressurized liquid extraction of chlorinated polycyclic aromatic hydrocarbons from soil samples using aqueous solutions
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Pressurized liquid extraction of chlorinated polycyclic aromatic hydrocarbons from soil samples using aqueous solutions

机译：使用水溶液从土壤样品中加压提取氯代多环芳烃

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摘要

A novel method was developed for the determination of chlorinated polycyclic aromatic hydrocarbons (Cl-PAHs) in soil. The method is based on pressurized liquid extraction (PLE) of the analytes using aqueous solutions, and combined with a further concentration step using solid-phase extraction (SPE) and followed by gas chromatography-mass spectrometry (GC-MS). The experimental parameters that influenced extraction efficiency were systematically evaluated. The optimal responses were observed by extracting 1 g of soil with the solution of water : acetone (75 : 25, v/v) at 150 degrees C for 5 min and circulated for three cycles. The obtained extracts were diluted and then concentrated by SPE. The recoveries ranged from 84.5 to 110.5% with standard deviations (RSDs) below 9.7%. The proposed method was successfully applied to the determination of Cl-PAHs in real soil samples. Most of the chlorinated polycyclic aromatic hydrocarbons were detected and 1-chloropyrene (1-ClPyr) was predominant in the studied soil samples. The toxic equivalency quotients (TEQs) of Cl-PAHs in the studied soil samples were calculated and were 5717 pg-TEQ per g for the soil from the chemical industrial complex, 3871 pg-TEQ per g for the soil from the e-waste recycling facility, 2061 pg-TEQ per g for the soil from the main traffic road and 11 pg-TEQ per g for the soil from the farmland. The high TEQs of Cl-PAHs means they are potential contributors of dioxin-like toxicity in urban soils.
机译：建立了一种测定土壤中多环芳烃（Cl-PAHs）的新方法。该方法基于使用水溶液进行分析物的加压液体萃取（PLE），并结合使用固相萃取（SPE）和气相色谱-质谱（GC-MS）的进一步浓缩步骤。系统评价了影响提取效率的实验参数。通过在150摄氏度的水：丙酮（75：25，v / v）溶液中提取1 g土壤5分钟，并循环三个循环，可以观察到最佳响应。将获得的提取物稀释，然后通过SPE浓缩。回收率范围为84.5至110.5％，标准偏差（RSD）低于9.7％。该方法成功地用于实际土壤样品中Cl-PAHs的测定。在所研究的土壤样品中，大多数氯化多环芳烃都被检测到，其中1-氯py（1-ClPyr）占主导。计算出所研究的土壤样品中Cl-PAHs的毒性当量商（TEQ），对于化学工业园区的土壤，其毒性当量为每克5717 pg-TEQ，对于电子废物回收的土壤，其毒性当量为每克3,871 pg-TEQ。设施，主要交通道路的土壤每克2061 pg-TEQ，农田的土壤每克11 pg-TEQ。 Cl-PAHs的高TEQ意味着它们是城市土壤中二恶英样毒性的潜在贡献者。

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