was for the substrate of the sensor on which surface printed silver ink was used as the electrical contact. The biosensor prototype had an overall dimension of 30 mm × 5.5 mm encompassing three electrodes: a Ag/AgCl printed reference electrode, a printed Ir/C working and a Ir/C counter electrodes. The geometric surface area for the printed working electrode was 7.85 × 10−3 cm2. Figure 1 shows the sensor prototype and will be used for ALT detection in this study.
Figure