Electrogenerated chemiluminescence using platinum electrodes with hydrogen peroxide pre-treatment

Abstract

A novel hydrogen peroxide pre-treatment of platinum electrodes is described. The method is applied to the electrogenerated chemiluminescence of luminol using air-segmented flow and an improved response and precision are reported. A rectilinear calibration for luminol is reported from 10^–10 mol dm^–3 to 10^–5 mol dm^–3 with a LOD of 1 × 10^–10 mol dm^–3. An explanation in terms of surface effects on the electrode surface is given, supported by cyclic voltammetry results.