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Bombardier beetle based biosensor
H S Nakatani1, G de Oliveira Neto, O E Godinho
1Instituto de Química, Universidade Estadual de Campinas, Brazil.
Biosensors & Bioelectronics
|January 1, 1996
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.