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首页> 外文期刊>Cogent Food & Agriculture >Evaluation of method performance and matrix effect for 57 commonly used herbicides in some vegetable families using LC-MS/MS determination
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Evaluation of method performance and matrix effect for 57 commonly used herbicides in some vegetable families using LC-MS/MS determination

机译：使用LC-MS / MS测定的一些蔬菜家族中57种常用除草剂的方法性能和基质效应的评价

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A modified QuEChERS method was employed with LC-MS/MS to evaluate the matrix effects of 12 different vegetables matrices in 57 globally used herbicides. The average recoveries of pesticides at different concentrations varied between 70 and 120%. The reproducibility expressed as relative standard deviation was <25%. The limit of quantitation was (0.005–0.01?mg/kg). The measurement uncertainty is lower than 40%. Three vegetables families: Cucurbitaceae, Solanaceae and leafy vegetables were selectd for study. Among the investigated commodities, leafy green vegetables have the highest matrix effects, MEs percentages ranged between (2and282%). The highest suppression in analytes response was observed for parsley with matrix ME (2–19%). Most of tested herbicides showed suppression extent at the lower fortified concentrations. Tomato recorded the highest enhancement in most of studied herbicides of MEs% ranged from (122 to 379%). Butachlor, chlorbromuron, fenoxaprop-p-ethyl, flufenacet, fluzafop-p-butyl, hexythiazox, prosulfocarb and pyriproxyfen showed ion suppresion for all vegetables matrices with MEs% ranged from (5 to 79%). Matrix effects (MEs) were evaluated by comparing the slopes of target analytes to prove reproducibility (n?=?5). The current study emphasize using of matrix match calibration with these commodity pesticides combinations, whereas, ME’s were dependent on composition of analyte and co-eluting agents.
机译：改性QueChers方法与LC-MS / MS一起使用，以评估12种不同蔬菜基质在全球使用的除草剂中的12种不同蔬菜基质的基质效应。不同浓度的农药的平均回收率在70％至120％之间变化。表达为相对标准偏差的再现性<25％。定量限是（0.005-0.01×mg / kg）。测量不确定性低于40％。三个蔬菜家庭：葫芦科，茄科和叶茂盛蔬菜选择进行研究。在调查的商品中，叶状绿色蔬菜具有最高的基质效应，MES百分比之间（282％）。对于荷兰芹，观察到分析物反应的最高抑制，与Matrix Me（2-19％）。大多数经过测试的除草剂在较低强化浓度下显示出抑制范围。番茄在MES％的大部分除草剂中录制了最高的增强（122至379％）。 Butachlor，Horthbromuron，FenoxaProp-乙基，毛细胞，Fluzafop-utuck，六氮噻嗪，皮瓣和吡咯xyfen为所有蔬菜基质的离子Suppresion，MES％的范围（5-79％）。通过比较靶分析物的斜率来评估基质效应（MES）以证明再现性（n？=？5）。目前的研究强调使用这些商品杀虫剂组合的矩阵匹配校准，而我依赖于分析物和共同洗脱剂的组成。

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