کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
182516 459430 2006 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A strategy for the determination of dopamine at a bare glassy carbon electrode: p-Phenylenediamine as a nucleophile
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
A strategy for the determination of dopamine at a bare glassy carbon electrode: p-Phenylenediamine as a nucleophile
چکیده انگلیسی

Electrochemical oxidation of dopamine (DA) in the presence of p-phenylenediamine (PPD) as a nucleophile in aqueous buffered solutions was studied. The results indicate that the o-dopaminoquinone (o-DQ) electrochemically derived from DA participates in 1,4-Michael addition with PPD to form the corresponding new derivative (P2), which is present as the oxidized state (Q2) at the electrolysis applied potential. This reaction pathway inhibits the cyclization of o-DQ and thus, the formation of polymerized films on the electrode surface. The reduction current for Q2 to P2 can be used to determine DA concentration. A selective sensing and quantitative determination of DA by adding PPD and using a bare glassy carbon electrode in the presence of a high concentration of ascorbic acid was verified.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochemistry Communications - Volume 8, Issue 9, September 2006, Pages 1514–1520
نویسندگان
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