Vitamin K3 encapsulated poly(vinylpyrrolidone) film modified glassy carbon electrode for studying the vitamin K3 - caffeine interaction

摘要

The cathodic and anodic peak currents in cyclic voltammogram of vitamin K3 encapsulated polyvinyl pyrollidone film modified glassy carbon electrode decrease with addition of caffeine (from 0.02 mu M to 0.2 mu M) in the electrolytic solution.Caffeine converts vitamin K3 into diphenylenetetranol,which is electrochemically inactive.This interaction between vitamin K3 and caffeine is not observed when both are in solution.