Highly Selective Dopamine Quantification using a Glassy Carbon Electrode Modified with a Melanin - Type Polymer

M. D. RUBIANES; GUSTAVO A. RIVAS

Elsevier

Lugar: EEUU; Año: 2001 vol. 440 p. 99 - 99

span lang="en" style="font-family: Arial; font-size: 10pt;">A highly selective dopamine quantification at a new polymer-modified electrode in the presence of large excess of ascorbic acid and 3,4-dihydroxyphenyl acetic acid (dopac) is described. The electrochemical detection was performed at a glassy carbon electrode modified with a melanin-type polymer obtained by polymerization of 3.0 × 10-3 M l-dopa in 0.050M phosphate buffer solution pH 7.40 by applying 1.00V for 60 min. The polymeric film exhibits attractive permselectivity excluding anionic species such as potassium ferricyanide, a