Determination of Hydroxylamine by Capillary Electrophoresis-Electrochemical Detection with a Palladium-Particle Modified Carbon Fiber Microdisk Array Electrode

Abstract

Abstract A highly dispersed ultramicro palladium-particle modified carbon fiber microdisk array electrode (Pd-CFE) was employed for capillary electrophoresis-elecrochemical (CEEC) detection of hydroxylamine (HA). The Pd particles obtained were in the nanometer scale, had a high electrocatalytic activity towards HA and exhibited good reproducibility and stability. A linear relationship between the current and the analyte concentration was found between 5 × 10−6 and 1 × 10−3 mol/1 of HA with a correlation coefficient of 0.9992. The detection limit was 5 × 10−8 mol/1. The applicability of the method for the determination of HA in river water and waste water was investigated. Key Words: Palladium-particleModified carbon fiber microdisk array electrodeCapillary electrophoresisElectrochemical detectionHydroxylamine