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Residue Monitoring and Risk Assessment of Cyazofamid and Its Metabolite in Korean Cabbage Under Greenhouse Conditions.
Bulletin of Environmental Contamination and Toxicology ( IF 2.7 ) Pub Date : 2020-08-29 , DOI: 10.1007/s00128-020-02972-0
Aniruddha Sarker 1, 2 , Sang-Hyeob Lee 1 , Se-Yeon Kwak 1 , Ae-Ji Nam 1 , Hyo-Jeong Kim 1 , Jang-Eok Kim 1
Affiliation  

The residual characteristics and risk assessment with respect to cyazofamid and its metabolite 4-chloro-5-p-tolylimidazole-2-carbonitrile were monitored in case of Korean cabbage at different preharvest intervals during a greenhouse trial. The 0.02 kg a.i/ha of cyazofamid was sprayed twice on seven-day intervals (i.e., on day 0, 7, 14, and 21 before harvest). The liquid chromatography–tandem mass spectrometry analysis was used to monitor the residual amount of fungicide. The matrix-matched calibration curves with respect to the cyazofamid in Korean cabbage exhibited good linearity (R2 ≥ 0.999) and acceptable recoveries of 84.1%–114.9%. The biological half-life of cyazofamid in Korean cabbage was 3.18 days. During the treatment, the preharvest residue of cyazofamid in Korean cabbage 14 days before harvest (0.80 mg/kg) was lower than that specified by the MFDS–MRL (Ministry of Food and Drug Safety-Maximum Residue Limit, 2.0 mg/kg) and should be recommended as the safe preharvest-interval application limit. The hazard quotient showed low toxicity (70.58%) during the risk assessment study of cyazofamid.



中文翻译:

温室条件下大白菜中氰唑胺及其代谢物的残留监测与风险评估。

在大棚试验中,以不同的收获前间隔对大白菜进行了氰基法米定及其代谢物4-氯-5-甲苯基咪唑-2-腈的残留特征和风险评估。每隔七天一次(即收获前的第0、7、14和21天)喷洒0.02 kg ai / ha的cyfafamid。液相色谱-串联质谱分析法用于监测杀菌剂的残留量。大白菜中氰基法米定的基质匹配校准曲线表现出良好的线性(R 2 ≥0.999),可接受的回收率为84.1%–114.9%。cyazofamid在大白菜中的生物半衰期为3.18天。在处理过程中,收获前14天韩国甘蓝中的氰唑草胺的收获前残留量(0.80 mg / kg)低于MFDS-MRL(食品和药品安全部最大残留限量2.0 mg / kg)和应建议将其作为安全的收获前间隔施用限量。在氰基法米定的风险评估研究中,该危害商显示低毒(70.58%)。

更新日期:2020-08-29
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