Using β-cyclodextrin/attapulgite-immobilized ionic liquid as sorbent in dispersive solid-phase microextraction to detect the benzoylurea insecticide contents of honey and tea beverages

• Published in: Food chemistry 2016-04, Vol.197, p.1064-1072
• Main Authors: Yang, Miyi, Wu, Xiaoling, Xi, Xuefei, Zhang, Panjie, Yang, Xiaoling, Lu, Runhua, Zhou, Wenfeng, Zhang, Sanbing, Gao, Haixiang, Li, Jianyong
• Format: Article
• Language: English
• Subjects: Attapulgite; Benzoylurea insecticides; beta-Cyclodextrins; Chromatography, High Pressure Liquid - methods; Dispersive solid-phase microextraction; High-performance liquid chromatography; Honey - analysis; Insecticides - analysis; Ionic liquid; Ionic Liquids; Limit of Detection; Magnesium Compounds; Phenylurea Compounds - analysis; Plackett–Burman design; Silicon Compounds; Solid Phase Microextraction - methods; Tea - chemistry
• ISSN: 0308-8146; 1873-7072
• DOI: 10.1016/j.foodchem.2015.11.107

•Synthesis and characterization of IL modified β-cyclodextrin/attapulgite were presented.•Study of optimum experimental conditions for extraction procedures.•Rapid and efficient extraction without much organic solvents.•The proposed method was applicable for real tea drink and honey samples. A green, simple, inexpensive dispersive solid-phase microextraction method coupled with high-performance liquid chromatography was developed for rapid screening and selective recognition of benzoylurea insecticides (BUs) in honey and tea beverages. A novel adsorbent, ionic liquid (IL)-modified β-cyclodextrin/attapulgite (β-CD/ATP), was prepared by immobilizing IL on the surface of β-CD/ATP. A series of demanding extraction conditions were investigated through the experimental design. Under optimum conditions, the limits of detection for the analytes varied from 0.12 to 0.21μgL−1. The enrichment factors ranged from 112 to 150 folds. Linearities in the range of 5–500ngmL−1 were achieved for four BUs, while the correlation coefficients ranged from 0.9997 to 1.0000 and the recoveries from 84.5% to 104.7%. The precision of this method for the four BUs corresponded to intra-day and inter-day RSDs% lower than 3.85%. Finally, the proposed technique was applied for the preconcentration of the BUs from real samples with satisfactory results.