Development of amperometric biosensor in modified carbon paste with enzymatic preparation based on lactase immobilized on carbon nanotubes

摘要

Cyclic voltammogram of the sensors. a Carbon paste (CP); b carbon paste and lactase (CP/LAC); c carbon paste and carbon nanotubes (CP/CNTs); and d carbon paste, lactase, and carbon nanotubes (CP/LAC/CNTs). The experiments were conducted in a KCl solution (0.3 mol L−1) with a scanning velocity of 30 mV s−1