A LiMn 2 O 4  Based Electrochemical Scheme for Selective Measurement of Dopamine | Zendy

Leu Hoang Jyh | Zendy; Lin Meng Shan | Zendy

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A LiMn 2 O 4 Based Electrochemical Scheme for Selective Measurement of Dopamine

Author(s) -

Leu Hoang Jyh,

Lin Meng Shan

Publication year - 2006

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.200503404

Subject(s) - ascorbic acid , chemistry , dopamine , manganese , electrochemistry , inorganic chemistry , oxidizing agent , nuclear chemistry , electrode , organic chemistry , food science , neuroscience , biology

A new cathodic scheme was developed for the determination of dopamine by flow injection analysis (FIA). A mild oxidizing agent, lithium manganese (III, IV) oxide (LiMn 2 O 4 ), as an upstream modifier can oxidize the dopamine to produce the dopaminequinone, and then the oxidized product is subsequently detected by the downstream detector at −0.1 V (vs. Ag/AgCl). In this work, the significant feature of LiMn 2 O 4 based sensing scheme possesses no interference from other tested biological amines including acetylcholine, epinephrine, glutamate, and histamine. Otherwise, there is no detectable interference from ascorbic acid, but 2% and 1% negligible interferences were found from uric acid and acetaminophen, respectively.

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