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
2015; Elsevier BV; Volume: 197; Linguagem: Inglês
10.1016/j.foodchem.2015.11.107
ISSN1873-7072
AutoresMiyi Yang, Xiaoling Wu, Xuefei Xi, Panjie Zhang, Xiaoling Yang, Runhua Lu, Wenfeng Zhou, Sanbing Zhang, Haixiang Gao, Jianyong Li,
Tópico(s)Analytical Chemistry and Chromatography
ResumoA 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 0.21 μg L−1. The enrichment factors ranged from 112 to 150 folds. Linearities in the range of 5–500 ng mL−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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