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Gluconate dehydrogenase (GADH) biosensors have been developed for the satisfactory determination of gluconic acid in wine samples, without any pretreatment. The biosensors have been fabricated by cross-linking immobilization of GADH onto screen-printed carbon electrodes, containing the mediator tetrathiafulvalene (TTF). Chronoamperograms have been registered at +100mV vs. screen-printed Ag/AgCl electrode...
Screen-printed carbon electrodes (SPCEs) electrochemically platinised (Pt-SPCEs) and screen-printed platinised carbon electrodes (SPC Pt Es) have been chronoamperometrically characterized for the determination of formaldehyde (FA). The oxidation current registered at 600mV in the FA concentration range from 0.99 to 9.09mmolL −1 , led to higher precision values in terms of repeatability...
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