Electrochemical determination of L-methionine using the electropolymerized film of non-peripheral amine substituted Cu(II) phthalocyanine on glassy carbon electrode

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• 作者：A. John Jeevagan  ; [Author Vitae] ; S. Abraham John ; ^{abrajohn@yahoo.co.in}  ; [Author Vitae]
• 关键词：4伪-tetraaminophthlaocyanatocopper(II) ; Polymer film ; Differential pulse voltammetry ; l-methionine
• 刊名：Bioelectrochemistry
• 出版年：2012
• 期刊代码：7_15675394
• 类别：ch
• 出版时间：June, 2012
• 卷：85
• 期：Complete
• 页码：50-55
• 文件大小：1011 K

摘要

This paper reports the stable determination of l-methionine (L-Met) in phosphate buffer solution (pH = 4.0) using the electropolymerized film of 1,8,15,22-tetraaminophthalocyanato-copper(II) (p-4伪-Cu^IITAPc) on glassy carbon electrode (GCE). Bare GCE shows an ill-defined oxidation wave around 1.32 (卤 0.02) V for L-Met whereas p-4伪-Cu^IITAPc electrode shows a well-defined oxidation peak at 1.26 (卤 0.02) V. The modified electrode does not show any fouling effect towards the oxidation of L-Met. Further, the p-4伪-Cu^IITAPc modified electrode was successfully used for the selective determination of L-Met in the presence of ascorbic acid (AA) and uric acid (UA). Differential pulse voltammetry method was used to determine L-Met in the concentration range of 50-500 渭M with a detection limit of 2.7 脳 10^鈭?#xA0;8 M (S/N = 3). The present modified electrode shows good recovery results for spiked L-Met in human blood serum sample.