Journal
SENSORS
Volume 19, Issue 15, Pages -Publisher
MDPI
DOI: 10.3390/s19153286
Keywords
electronic tongue; modifiers; acetaminophen; ascorbic acid; uric acid; partial least squares regression
Funding
- Spanish Government (Ministerio de Economia y Competitividad) [CTQ2016-80170-P]
- Secretaria d'Universitats i Recerca del Departament d'Empreses I Coneixement de la Generalitat de Catalunya
- European Social Fund, European Union
- Universitat Autonoma de Barcelona through a PIF fellowship
- program ICREA Academia
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In the present work, ternary mixtures of Acetaminophen, Ascorbic acid and Uric acid were resolved using the Electronic tongue (ET) principle and Cyclic voltammetry (CV) technique. The screen-printed integrated electrode array having differentiated response for the three oxidizable compounds was formed by Graphite, Prussian blue (PB), Cobalt (II) phthalocyanine (CoPc) and Copper oxide (II) (CuO) ink-modified carbon electrodes. A set of samples, ranging from 0 to 500 mu mol.L-1, was prepared, using a tilted (3(3)) factorial design in order to build the quantitative response model. Subsequently, the model performance was evaluated with an external subset of samples defined randomly along the experimental domain. Partial Least Squares Regression (PLS) was employed to construct the quantitative model. Finally, the model successfully predicted the concentration of the three compounds with a normalized root mean square error (NRMSE) of 1.00 and 0.99 for the training and test subsets, respectively, and R-2 >= 0.762 for the obtained vs. expected comparison graphs. In this way, a screen-printed integrated electrode platform can be successfully used for voltammetric ET applications.
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