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Yang, Miyi; Wu, Xiaoling; Xi, Xuefei; Zhang, Panjie; Yang, Xiaoling; Lu, Runhua; Zhou, Wenfeng; Zhang, Sanbing; Gao, Haixiang; Li, Jianyong
Food chemistry, 04/2016, Letnik: 197Journal Article
•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.
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