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  • 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.

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.

Food chemistry (2015-12-18)
Miyi Yang, Xiaoling Wu, Xuefei Xi, Panjie Zhang, Xiaoling Yang, Runhua Lu, Wenfeng Zhou, Sanbing Zhang, Haixiang Gao, Jianyong Li
RÉSUMÉ

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 0.21 μg L(-1). The enrichment factors ranged from 112 to 150 folds. Linearities in the range of 5-500 ng m L(-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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Ensemble de fibres de SPME, divinylbenzène/carboxène/polydiméthylsiloxane (DVB/CAR/PDMS), matrix active group 50/30µm DVB/CAR/PDMS, needle size 24 ga, StableFlex, for use with autosampler, fiber L 1 cm, pk of 3
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Fibres SPME polydiméthylsiloxane (PDMS), df 100 μm(PDMS, for use with autosampler, needle size 23 ga
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Fibres SPME polydiméthylsiloxane (PDMS), df 100 μm(PDMS, needle size 24 ga, for use with manual holder
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Fibres SPME polydiméthylsiloxane (PDMS), df 100 μm(PDMS, for use with autosampler, needle size 24 ga
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Unité de fibres SPME, carboxène/polydiméthylsiloxane (CAR/PDMS), df 75 μm(CAR/PDMS, needle size 24 ga, for use with autosampler
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Fibres SPME polyacrylate (PA), df 85 μm(PA, for use with autosampler, needle size 24 ga
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Fibres SPME polydiméthylsiloxane (PDMS), df 100 μm(PDMS, for use with manual holder, needle size 23 ga
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Unité de fibres SPME, carboxène/polydiméthylsiloxane (CAR/PDMS), df 75 μm(CAR/PDMS, needle size 23 ga, for use with autosampler
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Unité de fibres SPME, Polydiméthylsiloxane/divinylbenzène (PDMS/DVB), df 65 μm(PDMS/DVB, for use with autosampler, needle size 23 ga
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Unité de fibres SPME, carboxène/polydiméthylsiloxane (CAR/PDMS), df 75 μm(CAR/PDMS, needle size 23 ga, for use with manual holder
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