Dissipation and residue of 2,4-<Emphasis Type="SmallCaps">d</Emphasis> in citrus under field condition |
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| Authors: | Weijun Chen Qiyang Zhao |
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| Institution: | 1.Citrus Research Institute,Southwest University,Chongqing,China;2.National Center for Citrus Engineering,Chongqing Municipal Key Laboratory for Citrus,Chongqing,China;3.School of Chemistry and Chemical Engineering,Southwest University,Chongqing,China;4.Laboratory of Citrus Quality and Safety Risk Assessment,Ministry of Agriculture,Chongqing,China;5.Quality Supervision and Testing Centre for Citrus and Seedling,Ministry of Agriculture,Chongqing,China |
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| Abstract: | The dissipation, residues, and risks of 2,4-dicholrophenoxyacetic acid (2,4-d) in citrus under field condition were investigated based on a simple ultra-performance LC (UPLC)-MS/MS method. The results indicated that the residue level of 2,4-d in citrus did not degrade gradually with sampling time under field condition. At pre-harvest intervals (PHI) of 20–40 days, 2,4-d residues were 0.021–0.269 mg/kg in citrus flesh, 0.028–0.337 mg/kg in whole citrus, and 0.028–0.376 mg/kg in citrus peel, all bellow the China maximum residue limit in citrus (1 mg/kg). Risks of 2,4-d were assessed by calculation of risk quotient, and the results revealed no significant health risks after consumption of citrus. |
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