Vol. 93, Issue 6, June 2008, pp.92-102

Evaluation of Aquatic Environments Using a Sensorial System Based on Conducting Polymers and its Potential Application in Electrochemical Sensors

^a*Nelson Consolin Filho, ^aEveraldo Carlos Venancio, ^a Eduarda Regina Carvalho, ^bMarcilene Ferrari Barriquello, ^cMarcela B. Cunha-Santino, ^c Irineu Bianchini Jr., ^cArmando A. H. Vieira and ^aLuiz H. C. Mattoso

 ^aLaboratório Nacional de Nanotecnologia Aplicada ao Agronegócio, Embrapa Instrumentação Agropecuária, P.O. Box 741, 13560-970, São Carlos-SP, Brazil

^bUniversidade Federal de São Carlos, Departamento de Química, São Carlos-SP, Brazil

^cUniversidade Federal de São Carlos, Departamento de Biologia, São Carlos-SP, Brazil

*E-mail: consolin@cnpdia.embrapa.br

Received:  9 May 2008   /Accepted: 24 June 2008   /Published: 30 June 2008

Abstract: A sensor array consisted of interdigitated gold electrodes modified with nanostructured ultra-thin films of conducting polymers was used to evaluate different water samples from three distinct reservoirs, located in the São Paulo State, Brazil, according to their eutrophic level, i.e. oligotrophic, eutrophic and hypereutrophic. These reservoirs samples presented different eutrophic levels. The sensor array data were processed and analyzed by using PCA (principal component analysis). In the near future, this will be a reliable and straightforward method to analyze water samples based on the concept of global selectivity and electrochemical impedance.

Keywords: Aquatic environments; Conducting polymers; Sensor; Electrochemical impedance

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