Magnetic molecular imprinted polymers with ionic liquid used as an auxiliary solvent (IL@MMIPs) for the recognition of the methyl carbamate pesticide carbaryl (CBR) in foodstuff have been synthesized. The properties and application of IL@MMIPs were determined. The kinetic and isotherm adsorption processes were found to follow the pseudo-second-order and the Scatchard models, respectively. The selective experiment showed that the IL@MMIPs exhibited good selectivity to CBR compared to magnetic nonimprinted polymers with IL (IL@MNIPs). By using the IL@MMIPs as an adsorbent for the enrichment of CBR in food samples, the limit of detection (LOD, S/N = 3) and the limit of quantitation (LOQ, S/N = 10) of this method were 3 μg kg−1 and 10 μg kg−1, respectively. Compared with the traditional method, the IL@MMIP method has better recoveries (83.23–99.83%), precision (1.12–2.09%), and stabilization (intraday, 1.08–2.81%; interday, 2.26–3.30%). IL@MMIPs are an ideal adsorbent that could be applied to conveniently detect CBR in complex food, and the proposed method can be considered as a selective and sensitive alternative to traditional methods with affordable cost, avoiding the complex pretreatment procedure.
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This work was sponsored by the Project Technology Innovation Research and Development of Chengdu Science and Technology Bureau [2018-YF05-00765-SN], Chengdu Technological Innovation Research and Development Project [2019-YF05-00823-SN], Foundation of Innovation Software Engineering for Young People in Sichuan , National Natural Science Foundation of China , and Student’s Platform for Innovation and Entrepreneurship Training Program .
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Chen, S., Fu, J., Fu, Z. et al. Preparation and characterization of magnetic molecular imprinted polymers with ionic liquid for the extraction of carbaryl in food. Anal Bioanal Chem 412, 1049–1062 (2020). https://doi.org/10.1007/s00216-019-02330-y
- Analytical method
- Magnetic molecular imprinted polymers
- Liquid chromatography
- Ionic liquid