SCREEN-PRINTED GLUCOSE OXIDASE ELECTRODE MODIFIED BY THERMALLY EXPANDED GRAPHITE
Screen-printed electrodes modified by thermally expanded graphite (TRG) and Prussian Blue were used as the basis of glucose oxidase (GO) biosensors. The study of chronoamperometric and cyclic voltammetric characteristics showed that the modification of screen-printed electrodes by TRG leads to the generation of higher values of the detected currents. Thus, the sensitivity in the region of the linear range of the GO-TGG-electrodes was 7 times greater than the sensitivity of the GO-electrodes without application of the TRG and was 3.89 /лЛ/mM and 0.56 цЛ/mM, respectively. The operational stability of the biosensors was measured for 1 month, the activity of the electrodes decreased by 1.7 times compared with the initial one.