Rapid determination of amide herbicides in environmental water samples with dispersive liquid–liquid microextraction prior to gas chromatography–mass spectrometry
Rapid determination of amide herbicides in environmental water samples with dispersive liquid–liquid microextraction prior to gas chromatography–mass spectrometry
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DOI：
10.1007/s00216-008-2208-4
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发表时间：
2008-06
影响因子：
4.3
通讯作者：
R. Zhao;Chun-peng Diao;Xia Wang;Ting Jiang;Jin-peng Yuan
中科院分区：
文献类型：
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作者：
R. Zhao;Chun-peng Diao;Xia Wang;Ting Jiang;Jin-peng Yuan
本文介绍了一种新的、简单、环保的酰胺类除草剂甲氯、乙草胺和丁草胺的快速测定方法。它是基于分散液液微萃取和气相色谱-质谱法。对萃取溶剂种类和体积、分散溶剂种类和体积、萃取时间、NaCl含量等影响富集效率的因素进行了详细的研究和优化。在最佳条件下，甲氯、乙草胺和丁草胺的检出限分别为0.02、0.04和0.003 μ L−1。实验结果表明，该方法在0.1 ~ 50 μg L−1范围内具有良好的线性关系，重现性好，相对标准偏差在1.6 ~ 3.0% （n= 5）。该方法已应用于实际水样的分析，取得了满意的结果。加标除草剂的平均加标回收率为80.3 ~ 108.8%。结果表明，该方法可作为同时测定环境水样中三种除草剂的有效方法。
This paper describes a novel, simple and environmentally friendly method for rapid determination of the amide herbicides metoalchlor, acetochlor, and butachlor. It is based on dispersive liquid-liquid microextraction and gas chromatography–mass spectrometry. Factors that may influence the enrichment efficiency, such as type and volume of extraction solvent, type and volume of dispersive solvent, extraction time, and content of NaCl, were investigated and optimized in detail. Under the optimum conditions, the limits of detection of metoalchlor, acetochlor, and butachlor were 0.02, 0.04, and 0.003 μg L−1, respectively. The experimental results indicated that there was linearity over the range 0.1–50 μg L−1and good reproducibility with relative standard deviations over the range 1.6–3.0% (n= 5). The proposed method has been applied for the analysis of real-world water samples, and satisfactory results were achieved. Average recoveries of spiked herbicides were in the range 80.3–108.8%. All of these indicated that the developed method would be an efficient method for simultaneous determination of the three herbicides in environmental water samples.