Análise por injeção em batelada de glicose assistida fotoeletroquimicamente explorando uma plataforma à base de Cu2O

Abstract

This work describes the development of a photoelectrochemical system for glucose quantification, exploring a photoelectrochemical assisted batch injection analysis (BIA). The BIA cell was coupled to a LED lamp in order, to control the incidence of light on the p-Cu2O/n-Cu2O/FTO photoactive platform. Physical and electrochemical characteristics of Cu2O films were investigated by X-ray diffraction, Raman spectroscopy, electrochemical impedance spectroscopy and cyclic voltammetry. The p-Cu2O/n-Cu2O/FTO photoelectrode coupled to PEC-BIA cellpresented a linear response from 10 to 1000 μmol L-1

, detection limit

of 4 μmol L-1

and sensitivity of 0.768 ± 0.011 μAμmol L-1

. Average recovery value of 96% was evaluatedto the determination of glucose in an artificial saliva sample, which indicates a promising performance for the determination and quantification of glucose in real samples.