Microelectrode arrays with interacting diffusion layers: Voltammetric applications

The review deals with the voltammetric application of interdigitated array (IDA) microelectrodes. They can be used as powerful HPLC detectors for anal ysis of biological samples. In this case a high selectivity is needed becau se of significant interference of metabolites. The current of the collector segment of LDA array does not include the undesirable background current b ecause interfering metabolites are irreversibly oxidized in the generator s egment and are not transported to the collector. High sensitivity is attain ed with current amplified by redox cycling which can also be realized in a double cell arrangement. This phenomenon enables stripping analysis applica tions to species which cannot be stripped from the electrode in a classic v oltammetric experiments.