A comparison of glassy-carbon and carbon-polymer composite electrodes incorporated into electrochemical detection systems for high-performance liquid chromatography.

A comparison has been made of the performance of a novel composite carbon-polymer electrode and a glassy-carbon electrode for use as working electrodes in an electrochemical detector for HPLC. The composite electrode was found to be comparable to the glassy-carbon electrode in terms of current response, superior in terms of cost, machinability, noise levels, stabilization time and accessible potential range, and inferior in terms of the potentials required for the oxidation of certain model compounds such as epinephrine and norepinephrine.