期刊
ELECTROANALYSIS
卷 30, 期 1, 页码 187-193出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/elan.201700592
关键词
Glucose; screen printed electrode; flow injection analysis; physical vapor deposition; oblique angle deposition; GLAD
资金
- FEDER funds of the UE
- MINECO [MAT2013-40852-R, MAT2016-79866-R]
- CSIC-MINECO [201560E055]
- RECUPERA2020 from MINECO-Fondo social Europeo
- RECUPERA project
This work reports about the performance of a Ni/Cu-modified screen printed electrodes (SPE/Ni/Cu), prepared by physical vapor deposition (PVD) in an oblique angle configuration (OAD), for non-enzymatic glucose sensing applications. SPE/Ni/Cu electrodes showed an excellent reversibility and a catalytic behavior for detection of glucose that were controlled by the diffusion of reactants up to the active sites at the electrode surface. The study with a flow injection analysis (FIA) setup of the main experimental variables affecting the detection process has shown that the developed electrode system had an excellent glucose sensitivity of 1.04AM(-1)cm(-2) (R-2:0.999), a linear response up to 1mM, a limit of detection of 0.33M and a time of analysis of ca. 30s per sample. The selectivity of the sensor was checked against various interferences, including ascorbic acid, uric acid, acetaminophen and other sugars, in all cases with excellent results. The feasibility of using this sensor for practical applications was successfully confirmed by determining the glucose concentration in different commercial beverages.
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