PMID- 29571502 OWN - NLM STAT- MEDLINE DCOM- 20180924 LR - 20190318 IS - 1873-7072 (Electronic) IS - 0308-8146 (Linking) VI - 255 DP - 2018 Jul 30 TI - Application of magnetic molecularly imprinted polymers for extraction of imidacloprid from eggplant and honey. PG - 81-88 LID - S0308-8146(18)30297-8 [pii] LID - 10.1016/j.foodchem.2018.02.061 [doi] AB - A magnetic molecularly imprinted polymer (MMIP) adsorbent for imidacloprid was prepared using non-covalent approach with functionalized nano Fe(3)O(4) particles (magnetic cores), imidacloprid (template), acrylic acid (functional monomer), ethylene glycol dimethacrylate (cross linker) and azobisisobutyronitrile (initiator) and used for selective separation of imidacloprid from honey and vegetable samples. The polymers were characterized using FT-IR spectroscopy, SEM and TEM images. For analysis of imidacloprid LC-MS/MS equipment was used. Adsorption kinetics was best explained by pseudo-second-order kinetic model. Adsorption data fitted well into linearized Freundlich equation (R(2) > 0.98). Scatchard plot analysis indicates the presence of two classes of binding sites in the MMIPs with the C(max) of 1889.6 microg g(-1) and 65448.9 microg g(-1), respectively. MMIPs demonstrated much higher affinity for imidacloprid over structurally similar analogues acetamiprid (alpha = 23.59) and thiamethoxam (alpha = 17.15). About 87.1 +/- 5.0% and 90.6 +/- 5.6% of the added imidacloprid was recovered from MMIPs in case of fortified eggplant and honey samples, respectively. CI - Copyright (c) 2018 Elsevier Ltd. All rights reserved. FAU - Kumar, Niranjan AU - Kumar N AD - Division of Agricultural Chemicals, ICAR-Indian Agricultural Research Institute, New Delhi 110012, India. FAU - Narayanan, Neethu AU - Narayanan N AD - Division of Agricultural Chemicals, ICAR-Indian Agricultural Research Institute, New Delhi 110012, India. FAU - Gupta, Suman AU - Gupta S AD - Division of Agricultural Chemicals, ICAR-Indian Agricultural Research Institute, New Delhi 110012, India. Electronic address: drsumangupta2002@yahoo.com. LA - eng PT - Journal Article DEP - 20180212 PL - England TA - Food Chem JT - Food chemistry JID - 7702639 RN - 0 (Methacrylates) RN - 0 (Neonicotinoids) RN - 0 (Nitriles) RN - 0 (Nitro Compounds) RN - 0 (Oxazines) RN - 0 (Polymers) RN - 0 (Thiazoles) RN - 3BN7M937V8 (imidacloprid) RN - 747IC8B487 (Thiamethoxam) RN - 7BK5G69305 (ethylene dimethacrylate) RN - FZ6PX8U5YB (azobis(isobutyronitrile)) SB - IM MH - Adsorption MH - Food Contamination/analysis MH - *Honey MH - Magnetics MH - Methacrylates/chemistry MH - Microscopy, Electron, Scanning MH - Microscopy, Electron, Transmission MH - Molecular Imprinting/*methods MH - Neonicotinoids/*isolation & purification MH - Nitriles/chemistry MH - Nitro Compounds/*isolation & purification MH - Oxazines/isolation & purification MH - Polymers/chemical synthesis/*chemistry MH - Solanum melongena/*chemistry MH - Solid Phase Extraction/instrumentation/methods MH - Spectroscopy, Fourier Transform Infrared MH - Tandem Mass Spectrometry MH - Thiamethoxam MH - Thiazoles/isolation & purification OTO - NOTNLM OT - Eggplant OT - Honey OT - Imidacloprid OT - Liquid chromatography mass spectrometry (LC-MS/MS) OT - Magnetic molecularly imprinted polymer (MMIP) EDAT- 2018/03/25 06:00 MHDA- 2018/09/25 06:00 CRDT- 2018/03/25 06:00 PHST- 2017/09/20 00:00 [received] PHST- 2018/01/18 00:00 [revised] PHST- 2018/02/11 00:00 [accepted] PHST- 2018/03/25 06:00 [entrez] PHST- 2018/03/25 06:00 [pubmed] PHST- 2018/09/25 06:00 [medline] AID - S0308-8146(18)30297-8 [pii] AID - 10.1016/j.foodchem.2018.02.061 [doi] PST - ppublish SO - Food Chem. 2018 Jul 30;255:81-88. doi: 10.1016/j.foodchem.2018.02.061. Epub 2018 Feb 12.