A conductive polymer based electronic nose for early detection of Penicillium digitatum in post-harvest oranges |
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| Authors: | Jonas Gruber Henry M Nascimento Elaine Y Yamauchi Rosamaria WC Li Carlos HA Esteves Gustavo P Rehder Christine C Gaylarde Márcia A Shirakawa |
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| Affiliation: | 1. Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes, 748, CEP 05508-000 São Paulo, SP, Brazil;2. Sociedade Brasileira de Microbiologia, São Paulo, SP, Brazil;3. Centro Universitário Estácio Radial São Paulo, São Paulo, SP, Brazil;4. Escola Politécnica, Universidade de São Paulo, São Paulo, SP, Brazil;5. University of Portsmouth, Portsmouth, UK |
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| Abstract: | We describe the construction of an electronic nose, comprising four chemiresistive sensors formed by the deposition of thin conductive polymer films onto interdigitated electrodes, attached to a personal computer via a data acquisition board. This e-nose was used to detect biodeterioration of oranges colonized by Penicillium digitatum. Significant responses were obtained after only 24 h of incubation i.e. at an early stage of biodeterioration, enabling remedial measures to be taken in storage facilities and efficiently distinguishing between good and poor quality fruits.The instrument has a very low analysis time of 40 s. |
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