采用超声微萃取和气相色谱法测定土壤中西玛津、特丁津及其脱烷基氯代三嗪代谢物
Determination of simazine, terbuthylazine, and their dealkylated chlorotriazine metabolites in soil using sonication microextraction and gas chromatography.
作者信息
Navarro S, Oliva J, Barba A, García C
机构信息
Universidad de Murcia, Departamento de Química Agrícola, Geología y Edafología, Spain.
出版信息
J AOAC Int. 2000 Sep-Oct;83(5):1239-43.
A rapid analytical method is proposed for the determination of simazine, terbuthylazine, and their chloro dealkylated metabolites (simazine-desethyl, simazine-bisdesethyl, and terbuthylazine-desethyl) in soil. A sonication micromethod is presented for the extraction of -triazine herbicides and their metabolites. Final determination is by gas chromatography (GC) with nitrogen-phosphorus detection. The identity of all compounds was confirmed by GC with mass selective detection in the selected-ion monitoring mode. All chromatograms were very clean, without interfering peaks, and no cleanup was needed. The limits of detection were 1 pg for simazine-bisdesethyl; 5 pg for simazine, terbuthylazine, and terbuthylazine-desethyl; and 10 pg for simazine-desethyl. The limits of quantitation were 1, 5, and 10 ppb, respectively. Mean recoveries from fortified soils ranged from 76% for simazine-bisdesethyl to 102% for simazine-desethyl, with relative standard deviations of 3-6%.
提出了一种快速分析方法，用于测定土壤中的西玛津、特丁津及其氯脱烷基代谢物（西玛津去乙基、西玛津双去乙基和特丁津去乙基）。介绍了一种超声微方法，用于提取三嗪类除草剂及其代谢物。最终通过带有氮磷检测的气相色谱法（GC）进行测定。所有化合物的身份通过在选择离子监测模式下带有质量选择性检测的GC得到确认。所有色谱图都非常干净，没有干扰峰，无需净化。双去乙基西玛津的检测限为1皮克；西玛津、特丁津和特丁津去乙基的检测限为5皮克；去乙基西玛津的检测限为10皮克。定量限分别为1、5和10 ppb。加标土壤的平均回收率范围为双去乙基西玛津的76%至去乙基西玛津的102%，相对标准偏差为3-6%。
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