Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.22/3013
Título: Molecularly-imprinted materials for potentiometric transduction: application to the antibiotic enrofloxacin
Autor: Kamel, Ayman H.
Moreira, Felismina T. C.
Rebelo, Tânia S. C. R.
Sales, M. Goreti F.
Palavras-chave: Enrofloxacin
Fia
Fish
Molecularly-imprinted sensors
Potentiometry
Data: 2011
Editora: Taylor & Francis
Relatório da Série N.º: Analytical Letters; Vol. 44, Issue 12
Resumo: Enrofloxacin (ENR) is an antimicrobial used both in humans and in food producing species. Its control is required in farmed species and their surroundings in order to reduce the prevalence of antibiotic resistant bacteria. Thus, a new biomimetic sensor enrofloxacin is presented. An artificial host was imprinted in specific polymers. These were dispersed in 2-nitrophenyloctyl ether and entrapped in a poly(vinyl chloride) matrix. The potentiometric sensors exhibited a near-Nernstian response. Slopes expressing mVΔlog([ENR]/M) varied within 48–63. The detection limits ranged from 0.28 to 1.01 µg mL 1. Sensors were independent from the pH of test solutions within 4–7. Good selectivity was observed toward potassium, calcium, barium, magnesium, glycine, ascorbic acid, creatinine, norfloxacin, ciprofloxacin, and tetracycline. In flowing media, the biomimetic sensors presented good reproducibility (RSD of ±0.7%), fast response, good sensitivity (47 mV/Dlog([ENR]/ M), wide linear range (1.0×10-5–1.0×10-3 M), low detection limit (0.9 µg mL-1), and a stable baseline for a 5×10-2 M acetate buffer (pH 4.7) carrier. The sensors were used to analyze fish samples. The method offered the advantages of simplicity, accuracy, and automation feasibility. The sensing membrane may contribute to the development of small devices allowing in vivo measurements of enrofloxacin or parent-drugs.
Peer review: yes
URI: http://hdl.handle.net/10400.22/3013
ISSN: 0003-2719
1532-236X
Versão do Editor: http://www.tandfonline.com/doi/abs/10.1080/00032719.2010.546021#.Uozl_H9qyZQ
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