中文摘要：本文开发了一种基于分散固相萃取和基于浮动有机液滴凝固的分散液-液微萃取法的高效液相色谱-紫外检测法，用于对番茄和黄瓜中毒死蜱、甲基毒死蜱及其主要降解产物3,5,6 -三氯-2 -吡啶的萃取与检测。最佳条件下，该方法具有较高的灵敏度和良好的线性关系，线性范围在2-500 ng/g内，相关系数在0.9991-0.9996范围内，富集因子在127-138范围内，检测限为0.12-0.68 ng/g，番茄样本中所有残留物的相对标准差均在3.25-6.26 %范围内。应用该方法对番茄和黄瓜中上述残留物的萃取与检测，获得了较满意的检测结果。
外文摘要：A simple method based on dispersive solid-phase extraction (DSPE) and dispersive liquid-liquid microextraction method based on solidification of floating organic droplets (DLLME-SFO) was developed for the extraction of chlorpyrifos (CP), chlorpyrifos-methyl (CPM), and their main degradation product 3,5,6-trichloro-2-pyridinol (TCP) in tomato and cucumber samples. The determination was carried out by high performance liquid chromatography with ultraviolet detection (HPLC-UV). In the DSPE-DLLME-SFO, the analytes were first extracted with acetone. The clean-up of the extract by DSPE was carried out by directly adding activated carbon sorbent into the extract solution, followed by shaking and filtration. Under the optimum conditions, the proposed method was sensitive and showed a good linearity within a range of 2-500 ng/g, with the correlation coefficients (r) varying from 0.9991 to 0.9996. The enrichment factors ranged from 127 to 138. The limit of detections (LODs) were in the range of 0.12-0.68 ng/g, and the relative standard deviations (RSDs) for 50 ng/g of each analytes in tomato samples were in the range of 3.25-6.26 % (n = 5). The proposed method was successfully applied for the extraction and determination of the mentioned analytes residues in tomato and cucumber samples, and satisfactory results were obtained.
 
外文关键词：DSPE, DLLME-SFO, CP, CPM, TCP, Activated carbon
作者：Peng, Guilong; He, Qiang; Lu, Ying; Mmereki, Daniel; Zhong, Zhihui
作者单位：Chongqing Univ, Key Lab Ecoenvironm Three Gorges Reg, Minist Educ, Chongqing 400045, Peoples R China.
期刊名称：NVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
期刊影响因子：2.76
出版年份：2016
出版刊次：10
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