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Metalloporphyrin - based Electronic Tongue: an Application for the Analysis of Italian White wines
Department of Chemical Sciences and Technologies, University of Rome “Tor Vergata”, Via della Ricerca Scientifica 1, 00133 Rome, Italy
Department of Electronic Engineering, University of Rome “Tor Vergata”, Via del Politecnico 1, 00133 Rome, Italy
CNR-IMM, Via del Fosso del Cavaliere, 00133 Rome, Italy
Biological Research Institute of Saint Petersburg State University, Laboratory of Soil Biochemistry, Oraniembaum rd. 2, 198509, Russia
* Author to whom correspondence should be addressed.
Received: 9 October 2007; Accepted: 12 October 2007 / Published: 15 November 2007
Abstract: An Electronic Tongue system (ET) composed of “all-solid-state” potentiometricsensors was developed and applied for the identification of white wines. The sensingproperties were due to the PVC based membranes doped with several metallo-porphyrinsdeposited on the surface of glassy carbon working electrodes; potentiometric responsetowards several ions in a concentration range from 10-5 M to 10-1 M were studied and cross-sensitivity of sensors was estimated. The sensor array was applied both for the classificationand quantitative analysis of “Verdicchio D.O.C.” Italian dry white wines produced by ninecantinas. Peculiar parameters of white wines (namely alcoholic degree, volatile acidity, SO2,L-Malic Acid, L-Lactic Acid and Total Polyphenols) individuated by standard analyticalmethods were compared with the values evaluated by metalloporphyrin-based ET. Thesystem satisfactory discriminates between an artificial wine control and analyzed winescoming from different cantinas and produced in different years. A satisfactory correlationbetween results of wine analysis performed by certified methods and ET response has beenobtained for SO2, L-Malic Acid, and Total Phenols content. The developed procedureallows the monitoring of the acetic acid amount in wines and hence to control wine volatileacidity, so indicating the initial steps of wine spoilage process.
Keywords: Electronic tongue; Potentiometric sensors; Porphyrins; White wine analysis
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MDPI and ACS Style
Verrelli, G.; Lvova, L.; Paolesse, R.; Di Natale, C.; D'Amico, A. Metalloporphyrin - based Electronic Tongue: an Application for the Analysis of Italian White wines. Sensors 2007, 7, 2750-2762.
Verrelli G, Lvova L, Paolesse R, Di Natale C, D'Amico A. Metalloporphyrin - based Electronic Tongue: an Application for the Analysis of Italian White wines. Sensors. 2007; 7(11):2750-2762.
Verrelli, Giorgio; Lvova, Larisa; Paolesse, Roberto; Di Natale, Corrado; D'Amico, Arnaldo. 2007. "Metalloporphyrin - based Electronic Tongue: an Application for the Analysis of Italian White wines." Sensors 7, no. 11: 2750-2762.