Preparation and characterization of magnetic molecular imprinted polymers with ionic liquid for the extraction of carbaryl in food
| Autor: | Fu Jingxia, Li He, Yong Yang, Li Yuzhu, Shuliang Liu, Xiaolin Ao, Fu Zhenzhen, Likou Zou, Shujuan Chen, Su Xin |
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| Rok vydání: | 2019 |
| Předmět: |
Insecticides
Polymers Ionic Liquids Food Contamination 02 engineering and technology Carbaryl Crystallography X-Ray 01 natural sciences Biochemistry Analytical Chemistry Molecular Imprinting chemistry.chemical_compound Adsorption Limit of Detection Spectroscopy Fourier Transform Infrared Magnetite Nanoparticles chemistry.chemical_classification Detection limit Chromatography Chemistry 010401 analytical chemistry Extraction (chemistry) Reproducibility of Results Polymer 021001 nanoscience & nanotechnology 0104 chemical sciences Methyl carbamate Solvent Kinetics Ionic liquid Microscopy Electron Scanning Thermodynamics 0210 nano-technology |
| Zdroj: | Analytical and bioanalytical chemistry. 412(5) |
| ISSN: | 1618-2650 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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