Talanta (Oxford), 2013-10, Vol.115, p.920-927
2013
Volltextzugriff (PDF)
Details
- Autor(en) / Beteiligte
- Titel
- Sol–gel molecularly imprinted polymer for selective solid phase microextraction of organophosphorous pesticides
- Ist Teil von
- Talanta (Oxford), 2013-10, Vol.115, p.920-927
- Ort / Verlag
- Netherlands: Elsevier B.V
- Erscheinungsjahr
- 2013
- Quelle
- MEDLINE
- Beschreibungen/Notizen
- A sol–gel technique was applied for the preparation of water-compatible molecularly imprinted polymer (MIP) for solid phase microextraction (SPME) using diazinon as template and polyethylene glycol as functional monomer. The MIP-coated fiber demonstrated much better selectivity to diazinon and its structural analogs in aqueous cucumber sample than in distilled water, indicating its potential in real samples. Thanks to its specific adsorption as well as rough and porous surface, the coating revealed rather larger extraction capability than the non-imprinted polymer and commercial fibers. In addition, the fiber exhibited excellent thermal (about 350°C) and chemical stability (organic and inorganic). After optimization of several parameters affecting extraction efficiency, a method based on MIP-SPME combined with gas chromatography was developed for the determination of organophosphorus pesticides (OPPs) in vegetable samples. The limits of detection for the tested OPPs were in the range of 0.017–0.77μgkg−1. The proposed method was applied to evaluate OPPs in spiked cucumber, green pepper, Chinese cabbage, eggplant and lettuce samples, and recoveries of 81.2–113.5% were obtained by the standard addition method with three spiking levels in each kind of vegetable. •A water-compatible molecularly imprinted fiber is prepared by sol–gel technique.•Diazinon is the template and polyethylene glycol is the functional monomer.•The fiber shows high selectivity to diazinon and structural analogs in real sample.•The fiber shows very high capacity, excellent solvent and thermal stability.•The extraction of targets is enhanced while the matrix effect is partially avoided.
- Sprache
- Englisch
- Identifikatoren
- ISSN: 0039-9140eISSN: 1873-3573DOI: 10.1016/j.talanta.2013.06.056Titel-ID: cdi_proquest_miscellaneous_1642262446
- Format
- –
- Schlagworte
- Adsorption, Brassica, Chinese cabbage, Chromatography, Gas, coatings, cucumbers, detection limit, diazinon, Diazinon - chemistry, Diazinon - isolation & purification, eggplants, Environmental Pollutants - chemistry, Environmental Pollutants - isolation & purification, Extraction, Fibers, gas chromatography, Imprinted polymers, lettuce, Limit of Detection, Molecular Imprinting, Molecularly imprinted polymer, Organophosphorous pesticides, Pesticides, Pesticides - chemistry, Pesticides - isolation & purification, Phase Transition, polyethylene glycol, Polyethylene Glycols - chemistry, Polymethyl Methacrylate - chemistry, Porosity, Sol gel process, Solid phase microextraction, Solid Phase Microextraction - methods, Solid phases, Sol–gel, Surface chemistry, sweet peppers, Vegetable, Vegetables, Vegetables - chemistry