Flexible hand-made carbon electrode decorated with metronidazole imprinted polymer

Carbon paper was used as a cost-effective electrode material for flexible electrodes fabrication. These electrodes were coated with polypyrrole film imprinted with metronidazole. SEM imaging indicated successful covering of the carbon paper fibers. This imprinted polymer-modified electrode responded linearly to the logarithm of metronidazole concentration in 0.2 to 200 nM range with the LOD of 0.4 nM in the DPV experiments in presence of the Ru(NH3)6Cl3 redox probe. Selectivity of the fabricated sensor was appreciably high, and apparent imprinting factor was equal to IF = 35. Such high selectivi-ty and imprinting factor confirmed successful imprinting in polypyrrole matrix. The sensor was vali-dated by metronidazole determination in honey samples. Moreover, robustness of the MIP-coated car-bon paper electrode was proven. Only a slight loss of recorded current values was observed when elec-trode was bent to approx. 45° and straightened multiple times.