کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
221190 463377 2007 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Resolution of dopamine and ascorbic acid using nickel(II) complex polymer-modified electrodes
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Resolution of dopamine and ascorbic acid using nickel(II) complex polymer-modified electrodes
چکیده انگلیسی

A glassy carbon (GC) electrode was modified with electropolymerized macrocyclic Ni(II) complex, at which dopamine (DA) and ascorbic acid (AA) were clearly resolved below pH 6.0 by cyclic voltammetry. Their charge transfer reaction was examined to elucidate their resolution and the oxidation reaction. DA had two charge transfer reactions below pH 6.0, allowing resolution of DA and AA. DA increased the peak separation between DA and AA, and the GC surface exposed to DA was involved in the DA oxidation that occurred at the Ni(II) complex-modified electrode. DA was determined selectively using the Ni(II) complex-modified electrode and the selective DA accumulation improved the DA response. The linear range was 0.5–50 μM (R = 0.9989) and the limit of detection (S/N = 3) was 0.15 μM. A Ni(II) complex-modified electrode can be used for selective DA detection in an acidic sample, such as urinary DA.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electroanalytical Chemistry - Volume 602, Issue 2, 15 April 2007, Pages 217–225
نویسندگان
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