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- W2056127974 abstract "A glucpse biosensor, based on the electrochemical immobilisation of glucose oxidase (GOD) in a poly(o-phenylendiamine) (PPD) film synthesized onto a NMP · TCNQ conducting organic salt (COS) electrode, is described and its performances are evaluated. The electrochemical cycling of the bare conducting organic salt electrode, in a phosphate buffer (pH 7) supporting electrolyte, accumulated a surface layer of TCNQ0, which was supposed to be the active mediator for the heterogeneous reoxidation of GOD. Under certain boundary conditions. Chen et al.'s model [C.J. Chen, C.C. Liu, R. Savinell, J. Electroanal. Chem., 248 (1993) 317] has been applied to describe the catalysis occurring at our biosensor. Moreover, when the electrolysis is fast, such a model was demonstrated to be equivalent to Albery et al.'s mathematics [W.J. Albery, P.N. Bartlett, D.H. Craston, J. Electroanal Chem., 194 (1985) 223], which allows the estimation of the kinetic constants. Such parameters indicated that substrate diffusion through the membrane and unsaturated enzyme kinetics were the rate-limiting processes. COS|PPD|GOD electrodes respond rapidly to glucose, the steady-state current being reached in 10–16 s. Biosensor responses under different operating conditions such as applied potential, presence of oxygen or interferents were investigated. The sensor response, tested in a day-to-day experiment, remained quite stable for 4 days, then decreased to 60% of the initial value on day 5. The shelf lifetime was at least 1 month." @default.
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- W2056127974 date "1997-09-01" @default.
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- W2056127974 title "Electrochemical immobilisation of enzymes on conducting organic salt electrodes: characterisation of an oxygen independent and interference-free glucose biosensor" @default.
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- W2056127974 doi "https://doi.org/10.1016/s0022-0728(97)00294-5" @default.
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