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首页> 外文期刊>Journal of Agricultural and Food Chemistry >Spinach or Amaranth Contains Highest Residue of Metalaxyl, Fluazifop-P-butyl, Chlorpyrifos, and Lambdα-cyhalothrin on Six Leaf Vegetables upon Open Field Application
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Spinach or Amaranth Contains Highest Residue of Metalaxyl, Fluazifop-P-butyl, Chlorpyrifos, and Lambdα-cyhalothrin on Six Leaf Vegetables upon Open Field Application

机译：菠菜或A菜中六种蔬菜的裸露田野施用含量最高，其中残留有甲霜灵，氟菌灵-对-丁基，毒死rif和lambdα-氯氟氰菊酯

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摘要

To select representative leaf vegetables which may contain the highest residue, field experiments of metalaxyl, fluazifop-P-butyl, chlorpyrifos, and lambdα-cyhalothrin on six crops including pakchoi, rape, crown daisy, amaranth, spinach, and lettuce were designed and conducted. In this study, a high-performance liquid chromatograph and electrospray ionization tandem mass spectrometer with multiple reaction monitoring was used to simultaneously determine metalaxyl and fluazifop-P-butyl residue in various samples, and a gas chromatograph with electron capture detector was used to detect chlorpyrifos and lambdα-cyhalothrin. The limits of quantification (LOQ) of metalaxyl, fluazifop-P-butyl, chlorpyrifos, and lambdα-cyhalothrin were in the range of 0.001-0.01 mg kg~(-1) for all samples, and the average recoveries of all pesticides ranged from 67.6 to 119.1% at spiked levels of 0.01-6.1 mg kg~(-1). In supervised field trials, the half-lives of metalaxyl, fluazifop-P-butyl, chlorpyrifos, and lambdα-cyhalothrin were in the range of 1.11-3.79 days, 1.11-2.27 days, 1.13-5.17 days, and 1.77-6.24 days. It was also found that all pesticide residues in spinach and/or amaranth were higher than others after application. It is recommended that spinach or amaranth can be selected as a representative crop of leaf vegetables in studying systemic fungicide, insecticides, and herbicides with similarity as metalaxyl, fluazifop-P-butyl, chlorpyrifos, and lambdα-cyhalothrin.
机译：为了选择可能残留量最高的代表性叶类蔬菜，设计并进行了甲霜灵，氟虫草酯-P-丁基，毒死，和lambdα-氯氟氰菊酯在六种作物上的田间试验，这些作物包括小菜，油菜，皇冠雏菊，a菜，菠菜和生菜。在这项研究中，使用具有多个反应监测功能的高效液相色谱仪和电喷雾电离串联质谱仪同时测定各种样品中的甲霜灵和氟苯并呋喃-P-丁基残留，并使用带有电子捕获检测器的气相色谱仪检测毒死rif和lambdα-氯氟氰菊酯。所有样品中甲霜灵，氟吡氟丁酯，毒死rif和兰伯达α-氟氯氰菊酯的定量限（LOQ）在0.001-0.01 mg kg〜（-1）范围内，所有农药的平均回收率范围为在0.01-6.1 mg kg〜（-1）的加标水平下，含量为67.6至119.1％。在有监督的现场试验中，甲霜灵，氟吡氟醚-对-丁基，毒死rif和lambdα-氯氟氰菊酯的半衰期为1.11-3.79天，1.11-2.27天，1.13-5.17天和1.77-6.24天。还发现施用后菠菜和/或a菜中的所有农药残留均高于其他农药残留。建议选择菠菜或a菜作为叶类蔬菜的代表性作物，以研究与甲霜灵，氟菌灵-P-丁基，毒死rif和lambdα-氯氟氰菊酯相似的系统性杀菌剂，杀虫剂和除草剂。

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