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Amperometric biosensor for formic acid in air

By K. J. Mattias Sandström, Jeffrey D. Newman, Anna-Lena Sunesson, Jan-Olof Levina and Anthony P. F. Turner


The possibility of developing a simple, inexpensive and specific personal passive ”real-time” air sampler based on biosensor technology was investigated. Formic acid was used as a model substance. The sensor is based on the enzymatic reaction between formic acid and formate dehydrogenase with NAD+ as a cofactor and Meldola’s blue as mediator. An effective way to immobilise the enzyme, cofactor and Meldola’s blue on screen-printed electrodes was found to be in a mixture of glycerol and phosphate buffer covered with a gas-permeable membrane. When the sensor was introduced into an atmosphere containing formic acid, it gave a distinct and rapid amperometric response

Publisher: Elsevier
Year: 2000
DOI identifier: 10.1016/S0925-4005(00)00566-9
OAI identifier:
Provided by: Cranfield CERES

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