Please use this identifier to cite or link to this item:
|標題:||Flow injection analysis of hydrogen peroxide on copper-plated screen-printed carbon electrodes||作者:||Zen, J.M.
|關鍵字:||prussian blue;oxide-films;electrocatalytic reduction;amperometric;detection;graphite-electrodes;catalysis;biosensor;oxidation;glucose;paste||Project:||Analyst||期刊/報告no：:||Analyst, Volume 125, Issue 9, Page(s) 1633-1637.||摘要:||
A disposable copper-plated screen-printed carbon electrode (CuSPE) was developed for the determination of hydrogen peroxide by flow injection analysis (FIA) at ambient temperature without deoxygenation. Cyclic voltammetry on the CuSPE in pH 7.4 phosphate buffer solution showed the growth of CuO and Cu2O. A well-defined reduction signal corresponding to the mediation of CuO and Cu2O occurred in the presence of hydrogen peroxide. The mechanistic study revealed that the reduction is a coupled-chemical reaction mechanism with the operation of pseudo-first order kinetics with respect to the concentration of Cu2O. The calculated electrochemical rate constant (k(e)) from Laviron's model is 13.7 s(-1). Systematic investigations were made to optimize the experimental parameters for hydrogen peroxide detection by FIA. With a poised potential of -0.3 V versus Ag/AgCl and a flow rate of 2 ml min(-1), the calibration curve was found to be linear up to 200 mu M hydrogen peroxide with a detection limit of 0.97 mu M (S/N = 3). The CuSPE is fairly stable for repetitive measurements.
|Appears in Collections:||化學系所|
Show full item record
TAIR Related Article
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.