Miniaturized device with a detachable three-electrode system and vibration motor for electrochemical analysis based on disposable electrodes

Abstract

This paper reports a miniaturized device for electrochemical analysis based on disposable electrodes. The device was integrated with a detachable three-electrode system and a vibration motor. A disposable and easy to fabricate Au-film electrode was used as working electrode. The Pt wire auxiliary electrode and Ag/AgCl wire reference electrode used in the reported system were detachable and reusable. A coin vibration motor was integrated to provide convection conditions in the accumulation step to enable rapid and sensitive analysis. Using bisphenol A (BPA) as a model analyte, the performance of the proposed device was demonstrated. The linear range and limit of the detection of BPA under optimal condition were 50–1000 and 30 μg L−1, respectively. The reduction in accumulation time by 25% through the introduction of vibration greatly improved the analysis efficiency. The device was applied to quantify BPA in real samples and the results were in agreement with those obtained by UPLC–MS.