Transfer Rates of 19 Typical Pesticides and the Relationship with Their Physicochemical Property
文献类型: 外文期刊
第一作者: Chen, Hongping
作者: Chen, Hongping;Pan, Rong;Zhang, Minglu;Liu, Xin;Lu, Chengyin;Chen, Hongping;Pan, Meiling;Liu, Xin;Lu, Chengyin;Chen, Hongping;Liu, Xin;Lu, Chengyin
作者机构:
关键词: tea brewing;pesticides;transfer rate;water solubility;octanol-water partition coefficient
期刊名称:JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY ( 影响因子:5.279; 五年影响因子:5.269 )
ISSN:
年卷期:
页码:
收录情况: SCI
摘要: Determining the transfer rate of pesticides during tea brewing is important to identify the potential exposure risks from pesticide residues in tea. In this study, the transfer rates of 19 typical pesticides from tea to brewing were investigated using gas chromatography tandem mass and ultraperformance liquid chromatography tandem mass. The leaching rates of five pesticides (isocarbophos, triazophos, fenvalerate, buprofezin, and pyridaben) during tea brewing were first reported. The pesticides exhibited different transfer rates; however, this result was not related to residual concentrations and tea types. Pesticides with low octanol-water partition coefficients (Logkow) and high water solubility demonstrated high transfer rates. The transfer rates of pesticides with water solubility > 29 mg L-1 or <15 mg L-1 were >25% or <10%, and those of pesticides with LogKow < 1.52 or >2.48 were >65% or <35%. This result indicates that water solubility at approximately 20 mg L-1 and LogKow at approximately 2.0 could be the demarcation lines of transfer rate. The results of this study can be used as a guide in the application of pesticides to tea trees and establishment of maximum residue limits of pesticides in tea to reduce pesticide exposure in humans.
分类号: R15`S
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