期刊
FOOD CHEMISTRY
卷 237, 期 -, 页码 275-281出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2017.05.118
关键词
Magnetic-ion imprinted polymer; Lead(II) determination; Atomic absorption spectrometry; Box-Behnken design
In this work, a magnetic ion-imprinted polymer (Fe3O4@SiO2@IIP) as a novel and selective nanosorbent for selective extraction of Pb(II) ions from various agricultural products is presented. The novel lead magnetic ion-imprinted polymer was synthesized by imidazole as a new ligand and grafted onto the surface of Fe3O4@SiO2 NPs. A Box-Behnken (BBD) design was used for optimization of the extraction and elution steps. In the selected conditions, the limit of detection was 0.48 ng mL(-1), preconcentration factor was 300, the sorption capacity of this new magnetic ion-imprinted polymer was 105 mg g(-1), and the precision of the method (RSD%) for six replicate measurements was found 3.2%. Finally, the feasibility of the new magnetic ion-imprinted polymer was evaluated by extraction and determination of trace Pb2+ ions in different agricultural products including (orange, mango, apple, kiwi, lettuce, broccoli, carrot, squash, eggplant, radish, mushroom, cucumber, and tomato). (C) 2017 Elsevier Ltd. All rights reserved.
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