Health & Environmental Research Online (HERO)


Print Feedback Export to File
8200443 
Journal Article 
基于低共熔溶剂的液液微萃取技术测定食用油中的新烟碱类杀虫剂 
Wang, S; Guo, Z; Geng, L 
2021 
Chinese Chamber of Commerce 
42 
8 
277-282 
Chinese 
In this study, a method for the determination of residues of four new neonicotinoid insecticides (thiamethoxam, imidacloprid, acetamiprid, and thiacloprid) in edible oil was developed using ultrasound-assisted liquid-liquid microextraction with deep eutectic solvent (UA-DES-LLME) followed by high performance liquid chromatography (HPLC).Samples were diluted with n-hexane and added with deep eutectic solvent (DES) before being subjected to ultrasonicassisted dispersive liquid-liquid microextraction (UALLME). Then, the extract was centrifuged. The lower DES-rich phase was collected and injected into the HPLC system for analysis. Several important parameters influencing the extraction efficiency, such as the type and volume of DES, ultrasonication time, and centrifugation time, were investigated. Under the optimized conditions, the recoveries of the analytes were between 81.9% and 98.0%, with relative standard deviations(RSD, n=5) of 5.5%-8.3%. The limits of detection (LODs) and limits of quantitation (LOQs) were 3.2-5.3 μg/L and 10.8-17.7 μg/L respectively. The method was successfully applied to real samples of soybean oil, sunflower seed oil and linseed oil. This method combined extraction and concentration in one step without the use of poisonous organic solvents.This method proved to be simple, rapid and efficient. © 2021, China Food Publishing Company. All right reserved. 
Deep eutectic solvent; Edible oil; Liquid-liquid microextraction; New neonicotinoid insecticides