Residual dynamic and risk assessment of dimethomorph in Swiss chard grown at two different sites

文献类型： 外文期刊

第一作者： Kabir, Md. Humayun

作者： Kabir, Md. Humayun;Rahman, Md. Musfiqur;Chung, Hyung Suk;Lee, Han Sol;Shim, Jae-Han;Abd El-Aty, A. M.;Abd El-Aty, A. M.;Shin, Ho-Chul;Kim, Mi-Ra;Chang, Byung-Joon;Wang, Jing

作者机构：

关键词： dimethomorph;dissipation half-life;LC-UVD;residue determination;risk assessment;Swiss chard

期刊名称：BIOMEDICAL CHROMATOGRAPHY （ 影响因子：1.902； 五年影响因子：1.809 ）

ISSN： 0269-3879

年卷期： 2018 年 32 卷 2 期

页码：

收录情况： SCI

摘要： Residue analysis of dimethomorph in Swiss chard cultivated at two different locations under greenhouse conditions was conducted using high-performance liquid chromatography-ultraviolet detection and confirmed by tandem mass spectrometry. The randomly collected samples (over 14days) were extracted with acetonitrile and purified using a Florisil solid-phase extraction cartridge. Linearity over a concentration range of 0.05-50.0mg/L had an excellent coefficient of determination of 0.9996. Recovery rate ranged from 82.98 to 95.43% with relative standard deviations 5.12% and limits of detection and quantification of 0.003 and 0.01mg/kg, respectively. The initial deposits [day 0 (2h post-application)] were considerably lower (7.57 and 8.55mg/kg for sites 1 and 2, respectively) than the maximum residue limit (30mg/kg) set by the Korean Ministry of Food and Drug Safety. The dissipation half-life was approximately the same, being 5.0 and 5.1days for sites 1 and 2, respectively. Risk assessment estimated as acceptable daily intake revealed a value of 0.084 or 0.094% (day 0) and 0.014% (10days post-application), for sites 1 and 2, respectively. The values indicated that dimethomorph can be safely used on Swiss chard, with no hazardous effects expected for Korean consumers.

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