Electrochemical sensor for amoxicillin using Cu/poly (o-toluidine) (sodium dodecyl sulfate) modified carbon paste electrode

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• 作者：Banafsheh Norouzi ; Tahere Mirkazemi
• 关键词：electropolymerization ; amoxicillin ; electrocatalytic oxidation ; copper
• 刊名：Russian Journal of Electrochemistry
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：52
• 期：1
• 页码：37-45
• 全文大小：535 KB
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• 作者单位：Banafsheh Norouzi (1)
  Tahere Mirkazemi (1)
  
  1. Department of chemistry, Qaemshahr Branch, Islamic Azad University, Basig bolvard, Postal Code 163, Qaemshahr, Iran
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Electrochemistry
  Physical Chemistry
  Russian Library of Science
  
• 出版者：MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
• ISSN：1608-3342

文摘

Poly(o-toluidine) (sodium dodecyl sulfate) (POT(SDS)) film was electrosynthesized on carbon paste electrode (CPE) by using the cyclic voltammetry technique in aqueous solution containing o-toluidine (OT), sulfuric acid and SDS. Then, copper oxide was incorporated by immersion of POT(SDS)/CPE in a solution of copper sulfate and using constant potential method. Then, the electrochemical characterization of the modified electrode is presented in alkaline solution. For the first time, electrochemical behaviour of amoxicillin (AMX) at the Cu/POT(SDS)/CPE has been investigated using cyclic voltammetry (CV) and chronoamperometric method. The experimental results suggest that the modified electrode exhibits electrocatalytic effect on the oxidation of AMX resulting in a marked enhancement of the anodic peak current response. Under the selected conditions, the anodic peak current was linearly dependent on the concentration of AMX in the range 80–200 and 5–150 μM with CV and amperometric method, respectively. The detection limits (2δ) were also estimated to be 60 and 3 μM. Some kinetic parameters such as the transfer second-order rate constant (k = 4.9 × 106 cm3 mol–1 s–1) of AMX was calculated. Therefore, this modified electrode was a simple, rapid and new electrode to determine AMX in pharmaceutical preparations. Keywords electropolymerization amoxicillin electrocatalytic oxidation copper