Cyclic voltammetric and nanogravimetric studies of NADP+ redox transformations on a yeast-modified platinum electrode
The paper authored by
A. Róka and
G. Inzelt
is published in Electrochemistry Communications (2014, vol. 45, pp. 9–12).
Abstract:
The dominant voltammetric response of a yeast suspension in neutral or slightly alkaline media can be assigned to the redox transformations of nicotinamide adenine dinucleotide (NAD+/NADH) and nicotinamide adenine dinucleotide phosphate (NADP+/NADPH). By immobilization of yeast on platinum, a stable electrode can be prepared which shows an electrocatalytic activity towards the reduction of NADP+ and the reoxidation of the product formed. Reversible cyclic voltammetric responses were obtained. The peak currents depend practically linearly on the NADP-Na2 concentration and on the square root of the scan rate. The surface mass changes accompanying the redox transformations were monitored by an electrochemical quartz crystal nanobalance.
