Manganese dioxide-modified carbon paste electrode for voltammetric determination of riboflavin

被引：0
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作者：
Eda Mehmeti
Dalibor M. Stanković
Sudkate Chaiyo
Ľubomir Švorc
Kurt Kalcher
机构：
[1] Institute of Chemistry,Department of Analytical Chemistry, Innovation Center of the Faculty of Chemistry
[2] Analytical Chemistry,Electrochemistry and Optical Spectroscopy Research Unit, Department of Chemistry, Faculty of Science
[3] Karl-Franzens University,undefined
[4] University of Belgrade,undefined
[5] Chulalongkorn University,undefined
[6] Institute of Analytical Chemistry,undefined
[7] Faculty of Chemical and Food Technology,undefined
[8] Slovak University of Technology in Bratislava,undefined
来源：
Microchimica Acta | 2016年 / 183卷
关键词：
Differential pulse voltammetry; Cyclic voltammetry; Vitamin B; Electrooxidation;
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学科分类号：
摘要：
A carbon paste electrode bulk was modified with MnO2 and investigated for use as an electrochemical sensor for riboflavin (vitamin B2) using differential pulse voltammetry (DPV). Riboflavin displays a well expressed oxidation peak at −0.15 V (versus Ag/AgCl) in solutions with a pH value of 2. Effects of pH value, pulse amplitude and pulse time were optimized by employing DPV. The signals obtained are linearly related to the concentrations of riboflavin in the range from 0.02 to 9 μM. Other features include a 15 nM detection limit, and good reproducibility (±3 %) and repeatability (±2 %). Interferences by common compounds were tested, and the method was successfully applied to the determination of riboflavin in pharmaceutical formulations where is gave recoveries in the range from 95 to 97 %.
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页码：1619 / 1624
页数：5
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