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Electrogenerated Chemiluminescence Determination of Dopamine and Epinephrine in the Presence of Ascorbic Acid at Carbon Nanotube/Nafion‐Ru(bpy) $\rm{ {_{3}^{2+}}}$ Composite Film Modified Glassy Carbon Electrode
Author(s) -
Guo Zhihui,
Dong Shaojun
Publication year - 2005
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.200403129
Subject(s) - ascorbic acid , nafion , chemiluminescence , carbon nanotube , glassy carbon , dopamine , chemistry , inorganic chemistry , electrode , epinephrine , nuclear chemistry , materials science , electrochemistry , organic chemistry , nanotechnology , cyclic voltammetry , medicine , food science , anesthesia , neuroscience , biology
Based on the inhibition effect of dopamine and epinephrine on Ru(bpy) $\rm{ {_{3}^{2+}}}$ ‐tripropylamine electrogenerated chemiluminescence system, the excellent properties of carbon nanotube, and the cation permselectivity of Nafion film, an electrogenerated chemiluminescence inhibition method for determination of dopamine and epinephrine in the presence of ascorbic acid at carbon nanotube/Nafion‐Ru(bpy) $\rm{ {_{3}^{2+}}}$ composite film modified glassy carbon electrode was described. The results showed that the proposed method was sensitive and selective for the determination of dopamine and epinephine. The linear calibration range was from 1.6×10 −9 M to 3.2×10 −5 M and 5×10 −8 M to 6×10 −5 M for dopamine and epinephrine, respectively. 200‐fold excess of ascorbic acid did not interfere with the determination of 1 μM dopamine and epinephrine.