Electrochemistry of adenosine-5-diphosphate on ionic liquid modified carbon electrode and its detection

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• 作者：Chengxiang Ruan (1)
  Zhaolan Sun (2)
  Shisheng Lu (3)
  Linfang Li (2)
  Jin Lou (1)
  Wei Sun (2)
  
• 关键词：carbon paste electrode ; adenosine ; 5-diphosphate ; cyclic voltammetry ; 1 ; (3 ; chloro ; 2 ; hydroxypropyl) ; 3 ; methylimidazole chloride
• 刊名：Russian Journal of Electrochemistry
• 出版年：2014
• 出版时间：February 2014
• 年：2014
• 卷：50
• 期：2
• 页码：129-135
• 全文大小：369 KB
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• 作者单位：Chengxiang Ruan (1)
  Zhaolan Sun (2)
  Shisheng Lu (3)
  Linfang Li (2)
  Jin Lou (1)
  Wei Sun (2)
  
  1. Jiangxi Key Laboratory of Surface Engineering, Jiangxi Science and Technology Normal University, Jiangxi, 330013, P. R. China
  2. College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, P. R. China
  3. Shandong Kasong Science and Technology Co. Ltd., Jining, 272000, P. R. China
  
• ISSN：1608-3342

文摘

A sensitive electrochemical method was proposed for the determination of adenosine-5-diphosphate (ADP) on an ionic liquid (IL) 1-(3-chloro-2-hydroxy-propyl)-3-methylimidazole chloride modified carbon paste electrode (CPE) in a pH 4.5 Britton-Robinson (B-R) buffer solution. Compared with CPE, IL modified CPE (CILE) showed strong electrocatalytic ability to promote the electrochemical oxidation of ADP. A well-defined irreversible oxidation peak of ADP appeared at +1.381 V with an adsorption-controlled process, which was due to the presence of high conductive IL on the electrode. The experimental conditions were optimized and the electrochemical parameters of ADP were calculated with the electron transfer coefficient (α) as 0.293, the electron transfer number (n) as 1.23, the apparent heterogeneous electron transfer rate constant (k s) as 3.325 × 10? s? and the surface coverage (ΓT) as 0.92 × 10? mol/cm2. Under the optimum conditions, the oxidation peak current was linear to ADP concentration in the range from 3.0 to 1000.0 μmol/L with the detection limit as 2.78 μmol/L (3σ) by differential pulse voltammetry. The CILE also eliminated the interferences of commonly coexisting substances and was successfully applied to detect the ADP artificial samples.