Wang Linnan, Wang Xinquan, Liu Hongyu, Wang Zhiwei, Qi Peipei, Zhao Huiyu, Liu Zhenzhen, Gu Chengbo, Di Shanshan
Key Laboratory of Forest Plant Ecology-Ministry of Education, Engineering Research Center of Forest Bio-Preparation-Ministry of Education, Heilongjiang Provincial Key Laboratory of Ecological Utilization of Forestry-based Active Substances, College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Harbin 150040, China.
State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products/Key Laboratory of Detection for Pesticide Residues and Control of Zhejiang, Institute of Agro-product Safety and Nutrition, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, P. R. China.
J Agric Food Chem. 2024 Dec 11;72(49):27106-27114. doi: 10.1021/acs.jafc.4c09160. Epub 2024 Nov 23.
Chiral fenpropathrin is a widely used pyrethroid insecticide. A fast supercritical fluid chromatography-tandem mass spectrometry (SFC-MS/MS) method was developed for the enantioselective study of fenpropathrin in five kinds of vegetables. The enantioseparation could be completed in 2 min, and the recoveries were 75.5-107.7% with RSDs of ≤15.2%. The dissipation half-lives of -fenpropathrin and -fenpropathrin were 2.32-3.62 days and 1.89-3.56 days, respectively. The dissipation of fenpropathrin was the fastest in cucumbers and the slowest in celery cabbage. -Fenpropathrin was preferentially dissipated in celery and cucumber, which was opposite in lettuce and pakchoi. The final residues of -fenpropathrin in celery cabbage, pakchoi, and lettuce were a little above the European Union's maximum residue limits (MRLs) but less than the China's MRLs. The acute and chronic dietary intake risks of -fenpropathrin for all age groups were acceptable. The results would provide a basis for the rational application and risk assessment of fenpropathrin.
手性甲氰菊酯是一种广泛使用的拟除虫菊酯类杀虫剂。建立了一种快速超临界流体色谱-串联质谱（SFC-MS/MS）方法，用于对5种蔬菜中甲氰菊酯进行对映体选择性研究。对映体分离可在2分钟内完成，回收率为75.5-107.7%，相对标准偏差≤15.2%。α-甲氰菊酯和β-甲氰菊酯的消解半衰期分别为2.32-3.62天和1.89-3.56天。甲氰菊酯在黄瓜中的消解最快，在大白菜中最慢。α-甲氰菊酯在芹菜和黄瓜中优先消解，在生菜和小白菜中则相反。β-甲氰菊酯在大白菜、小白菜和生菜中的最终残留量略高于欧盟的最大残留限量（MRLs），但低于中国的MRLs。所有年龄组β-甲氰菊酯的急性和慢性膳食摄入风险均可接受。研究结果将为甲氰菊酯的合理施用和风险评估提供依据。
