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Dissipation Dynamics and Dietary Risk Assessment of Kresoxim-Methyl Residue in Rice

文献类型： 外文期刊

作者： Sun, MingNa 1 ; Yu, Lu 1 ; Tong, Zhou 1 ; Dong, Xu 1 ; Chu, Yue 1 ; Wang, Mei 1 ; Gao, TongChun 1 ; Duan, JinSheng 1 ;

作者机构： 1.Anhui Acad Agr Sci, Inst Plant Protect & Agroprod Safety, Hefei 230031, Anhui, Peoples R China

2.Minist Agr, Key Lab Agroprod Safety Risk Evaluat Hefei, Hefei 230031, Anhui, Peoples R China

关键词： rice; kresoxim-methyl; dissipation; risk assessment

期刊名称：MOLECULES （ 影响因子：4.411； 五年影响因子：4.587 ）

ISSN： 1420-3049

年卷期： 2019 年 24 卷 4 期

页码：

收录情况： SCI

摘要： Kresoxim-methyl is a high-efficiency and broad-spectrum fungicide used for the control of rice fungal diseases; however, its residues after application potentially threaten human health. Investigations on the dissipation of kresoxim-methyl residue in rice field systems and dietary risk assessment of kresoxim-methyl in humans are limited. The present study employed the QuEChERS-GC-MS/MS method for residue analysis of kresoxim-methyl in rice plants, brown rice, and rice husks. The samples were extracted with acetonitrile and purified by PSA, C-18 column, and GCB. The average recovery of the spiked target compounds in the three matrices was between 80.5% and 99.3%, and the RSD was between 2.1% and 7.1%. The accuracy and precision of the method is in accordance with the requirements of residue analysis methods. Dissipation dynamic testing of kresoxim-methyl in rice plants indicated a half-life within the range of 1.8-6.0 days, and a rapid dissipation rate was detected. Dietary intake risk assessment showed that the national estimated daily intake (NEDI) of kresoxim-methyl in various Chinese subpopulations was 0.022-0.054 g/(kg bw days ), and the risk quotient (RQ) was 0.0000055-0.00014%. These findings indicate that the risk for chronic dietary intake of kresoxim-methyl in brown rice is relatively low. The present study provides information and theoretical basis for guiding the scientific use of kresoxim-methyl in rice fields and evaluating its dietary risk in brown rice.

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