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    An artificial taste sensor based on conducting polymers

    Year: 2003

    Journal: Biosensors and Bioelectronics 18 (2003) 1365-1369, 20111221

    Authors: A. Riul, Jr , R.R. Malmegrim , F.J. Fonseca , L.H.C. Mattoso

    Organizations: a EMBRAPA Instrumentao Agropecria, CP 741, CEP 13560-970 Sao Carlos, SP, Brazil b Laboratorio de Microeletrinica, Departamento de Engenharia de Sistemas Eletrinicos, EPUSP, 05508-900 Sao Paulo, SP, Brazil

    Pure and composite nanostructured films of conducting polymers were used as individual sensing units constituting an electronic tongue. The use of extremely thin films for signal transduction via impedance spectroscopy measurements in the frequency range 10-1 MHz allows the detection of trace amounts of tastants and inorganic contaminants in liquid systems. In addition, the sensor could detect the suppression of sourness by sweetness displaying similarities with the biological system. Brands of several commercial beverages could be easily distinguished without complex analysis, including the discrimination of waters, tastants and wines.