Efficient enzyme-free biomimetic sensors for natural phenol detection
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2016-08-13
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Resumo
The development of sensors and biosensors based on copper enzymes and/or copper
oxides for phenol sensing is disclosed in this work. The electrochemical properties were studied
by cyclic and differential pulse voltammetry using standard solutions of potassium ferrocyanide,
phosphate/acetate buffers and representative natural phenols in a wide pH range (3.0 to 9.0).
Among the natural phenols herein investigated, the highest sensitivity was observed for rutin,
a powerful antioxidant widespread in functional foods and ubiquitous in the plant kingdom.
The calibration curve for rutin performed at optimum pH (7.0) was linear in a broad concentration
range, 1 to 120 µM (r = 0.99), showing detection limits of 0.4 µM. The optimized biomimetic sensor
was also applied in total phenol determination in natural samples, exhibiting higher stability and
sensitivity as well as distinct selectivity for antioxidant compounds.
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Metal oxides, Modified electrodes, Enzyme-free biosensors, Rutin
Citação
GARCIA, Luane Ferreira et al. Efficient enzyme-free biomimetic sensors for natural phenol detection. Molecules, Basel, v. 21, e1060, 2016. DOI: 10.3390/molecules21081060. Disponível em: https://www.mdpi.com/1420-3049/21/8/1060. Acesso em: 16 jun. 2023.