American Journal of Analytical Chemistry

Volume 2, Issue 5 (September 2011)

ISSN Print: 2156-8251   ISSN Online: 2156-8278

Google-based Impact Factor: 1.71  Citations  h5-index & Ranking

Selective Detection of Dopamine in the Presence of Ascorbic Acid at Poly (m-Aminobenzene Sulfonic Acid)

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DOI: 10.4236/ajac.2011.25066    5,218 Downloads   9,474 Views  Citations

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ABSTRACT

Poly (m-aminobenzene sulfonic acid, m-ABSA) films were electrochemically prepared by cyclic voltammetry (CV) in 0.1 mol L–1 KCl solution. The dopamine (DA) selectivity of polymeric electrodes prepared at the different thicknesses was examined in the presence of ascorbic acid (AA). The results showed that the modified electrode showed an excellent electrocatalytical effect towards oxidation of dopamine (DA) and ascorbic acid (AA). Electrostatic interaction between the negatively charged poly(m-ABSA) film and either cationic DA species or anionic AA species favorably contributed to the redox response of DA and AA. Moreover, the regular and repetitive responses for dopamine were obtained even in the presence of the some interfering substances such as ascorbic acid, NaCl, NaClO4, Na2SO4 ,NaNO3 and KCl.

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G. Erdoğdu and M. Mutlu, "Selective Detection of Dopamine in the Presence of Ascorbic Acid at Poly (m-Aminobenzene Sulfonic Acid)," American Journal of Analytical Chemistry, Vol. 2 No. 5, 2011, pp. 582-588. doi: 10.4236/ajac.2011.25066.

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