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Dissipation rates, residue distribution, degradation products, and degradation pathway of sulfoxaflor in broccoli

文献类型： 外文期刊

作者： Chen, Guofeng 1 ; Liu, Feng 1 ; Zhang, Xiaobo 1 ; Zhang, Ruiying 1 ; Cheng, Aihua 1 ; Shi, Dongmei 1 ; Dong, Jiannan 1 ; Liao, Hui 1 ;

作者机构： 1.Heilongjiang Acad Agr Sci, Safety & Qual Inst Agr Prod, Harbin 150086, Peoples R China

关键词： Sulfoxaflor; Broccoli; Dissipation; Distribution; Degradation products; Degradation pathway

期刊名称：ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH （ 影响因子：5.19； 五年影响因子：5.053 ）

ISSN： 0944-1344

年卷期：

页码：

收录情况： SCI

摘要： Broccoli was selected as the research object in this paper to reveal the dissipation, distribution, and degradation pathway of sulfoxaflor under greenhouse and open-field cultivation conditions for the ecological risk assessment of sulfoxaflor. Results showed that the dissipation of sulfoxaflor in broccoli leaves, flowers, stems, roots, and the whole broccoli was in accordance with the first-order kinetic equation. The sulfoxaflor concentration in broccoli roots reached the maximum value after 1 day of application and then gradually decreased. The degradation half-lives of sulfoxaflor in the roots, leaves, flowers, stems, and whole broccoli were between 2.3 and 19.8 days. The longest degradation half-life of sulfoxaflor was in Heilongjiang under greenhouse cultivation. The terminal residue of sulfoxaflor in broccoli was in the range of 0.005-0.029 mg/kg, and the proportion of sulfoxaflor residue in broccoli leaves was the largest. Thirteen transformation products were separated and identified by ultrahigh-performance liquid chromatography-quadrupole time-of-flight mass spectrometry, and their kinetic evolution was studied. The cleavage of the N = S bond, C-S bond, C-O bond, and cyanide, as well as glucosylation, hydroxylation, SO extrusion, elimination, sulfhydrylation, ketonization, defluorination, and rearrangement, was inferred as the mechanism. Overall, these results can provide guidance for the supervision of the safe application of sulfoxaflor.

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