title: A conductive polymer based electronic nose for early detection of Penicillium digitatum in post-harvest oranges.
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.
authors.affiliation: Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes, 748, CEP 05508-000 São Paulo, SP, Brazil. jogruber@iq.usp.br
authors.forename: Jonas
authors.initials: J
authors.lastname: Gruber
authors.forename: Henry M
authors.initials: HM
authors.lastname: Nascimento
authors.forename: Elaine Y
authors.initials: EY
authors.lastname: Yamauchi
authors.forename: Rosamaria W C
authors.initials: RW
authors.lastname: Li
authors.forename: Carlos H A
authors.initials: CH
authors.lastname: Esteves
authors.forename: Gustavo P
authors.initials: GP
authors.lastname: Rehder
authors.forename: Christine C
authors.initials: CC
authors.lastname: Gaylarde
authors.forename: Márcia A
authors.initials: MA
authors.lastname: Shirakawa
mesh_terms: D004581:Electronics; D005638:Fruit / Q000382:microbiology*; D010407:Penicillium / Q000302:isolation & purification*; D011108:Polymers / Q000737:chemistry*
chemical_list: D011108:Polymers