Application of a 32-microband electrode array detection system for liquid chromatography analysis.
An electrode array consisting of 32 microband electrodes and a generator electrode was constructed. With this electrode array, both the oxidation and reduction three-dimensional hydrodynamic chromatovoltammograms of a reversible reaction can be obtained in a single voltammetric run. The versatility of this electrode array was demonstrated by running solutions containing various phenolic compounds with an FIA and an HPLC system. From the oxidation and reduction chromatovoltammograms obtained, individual components in the sample solution can be determined quantitatively, even when overlapping of the chromatography peaks occurred. With this microband electrode array, detection limits down to 2.0 × 10(-8) M for the studied phenolic compounds were obtained.