title: Bombardier beetle based biosensor.
abstract: A biosensor constructed by combining an oxygen electrode with the liquid ejected by bombardier beetles (Pheropsophus aequinoctialis) immobolized on a collagen membrane is developed for hydrogen peroxide. The sensor presents a linear range of 2.0 x 10(-4)-2.0 x 10(-3) M and a reproductibility of approximately 2%. It shows a better lifetime than similar ones employing purified catalase. The selectivity is good since other enzymes are not present in the natural source employed.
authors.affiliation: Instituto de Química, Universidade Estadual de Campinas, Brazil.
authors.forename: H S
authors.initials: HS
authors.lastname: Nakatani
authors.forename: G
authors.initials: G
authors.lastname: de Oliveira Neto
authors.forename: O E
authors.initials: OE
authors.lastname: Godinho
authors.forename: L M
authors.initials: LM
authors.lastname: Aleixo
authors.forename: K
authors.initials: K
authors.lastname: Zinner
mesh_terms: D000818:Animals; D015374:Biosensing Techniques; D002138:Calibration; D002374:Catalase; D001517:Coleoptera / Q000201:enzymology*; D006861:Hydrogen Peroxide / Q000032:analysis; D006863:Hydrogen-Ion Concentration; D016014:Linear Models; D008567:Membranes, Artificial; D009195:Peroxidase; D015203:Reproducibility of Results; D013696:Temperature
chemical_list: D008567:Membranes, Artificial; D006861:Hydrogen Peroxide; D002374:Catalase; D009195:Peroxidase