Please use this identifier to cite or link to this item: http://hdl.handle.net/10174/14229

Title: Development of a selective sorbent for the solid-phase extraction of terbuthylazine in olive oil samples: A molecular imprinting strategy
Authors: Garcia, Raquel
Martins, Nuno
Carreiro, Elisabete
Simões, Marco
Ribeiro Carrot, Maria ML
Carrot, Peter J.M..
Burke, Anthony
Cabrita, Maria Joao
Keywords: Molecularly imprinted polymers
Olive oil
Solid-phase extraction
erbuthylazine
Issue Date: 2015
Publisher: Wiley
Abstract: Aiming to implement an analytical methodology that is highly selective for the extraction and quantification of terbuthylazine from olive oil, we successfully achieved: (i) the development of a molecularly imprinted polymer by bulk polymerization using terbuthylazine as template molecule,methacrylic acid as functionalmonomer, ethylene glycol dimethacrylate as cross-linker, and dichloromethane as porogen; (ii) characterization of the imprintingmaterial using Fourier transform infrared spectroscopy, thermogravimetric analysis, nitrogen adsorption at 77 K, and scanning electron microscopy; (iii) their molecular recognition for the template molecule using high-performance liquid chromatography, and (iv) optimization of a solid-phase extraction procedure using as sorbent the synthesized molecularly imprinted polymer for the selective extraction and clean-up of terbuthylazine from spiked organic olive oil and further quantification of the pesticide levels by high-performance liquid chromatography. The suitability of the implemented analytical methodology was demonstrated, as concentrations of terbuthylazine below the tolerated maximum residue limits in the spiked organic olive oil samples could be satisfactorily analyzed with good precision/ accuracy with high recovery rates (96%). Overall, the implemented methodology has proven to be reliable and robust and is highly promising in the field of sample preparation, particularly for the isolation/preconcentration of terbuthylazine in complex food samples.
URI: http://hdl.handle.net/10174/14229
Type: article
Appears in Collections:CQE - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica
QUI - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica
ICAAM - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica
FIT - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica

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