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Sodium dodecyl sulfate-modified carbon paste electrodes for selective determination of dopamine in the presence of ascorbic acid.
Bioelectrochemistry. 2007 May; 70(2):408-15.B

Abstract

A carbon paste electrode (CPE) modified by a monolayer film of sodium dodecyl sulfate (SDS) was used for detection of dopamine (DA). Cyclic voltammetry demonstrated improved response of the DA sensor. This suggests the effectivity of surface modification of CPE by SDS. Impedance spectroscopy was used for the characterization of CPE surface properties. The effect of SDS concentration on the electrode quality also reveals that SDS formed a monolayer on CPE surface with a high density of negative-charged end directed outside the electrode. As a result, the carbon paste electrode modified with SDS (SDS/CPE) exerted discrimination against ascorbic acid in physiological circumstance. Thus, it can selectively determine dopamine even in the presence of 220-fold AA combined with differential pulse stripping voltammetry. In pH 7.40 phosphate buffer solution, the oxidation peak current on differential pulse voltammograms increases linearly with the concentration of DA in the range of 5.0 x 10(-7) to 8.0 x 10(-4) mol . L(-1) with a detection limit of 5.0 x 10(-8) mol . L(-1). Satisfying results are achieved when detecting the DA in injection and simulated biology sample.

Authors+Show Affiliations

Institute of Analytical Science/Shaanxi Provincial Key Laboratory of Electroanalytical Chemistry, Northwest University, Xi'an 710069, China. zhengjb@nwu.edu.cn <zhengjb@nwu.edu.cn>No affiliation info available

Pub Type(s)

Evaluation Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

16843072

Citation

Zheng, Jianbin, and Xiaoli Zhou. "Sodium Dodecyl Sulfate-modified Carbon Paste Electrodes for Selective Determination of Dopamine in the Presence of Ascorbic Acid." Bioelectrochemistry (Amsterdam, Netherlands), vol. 70, no. 2, 2007, pp. 408-15.
Zheng J, Zhou X. Sodium dodecyl sulfate-modified carbon paste electrodes for selective determination of dopamine in the presence of ascorbic acid. Bioelectrochemistry. 2007;70(2):408-15.
Zheng, J., & Zhou, X. (2007). Sodium dodecyl sulfate-modified carbon paste electrodes for selective determination of dopamine in the presence of ascorbic acid. Bioelectrochemistry (Amsterdam, Netherlands), 70(2), 408-15.
Zheng J, Zhou X. Sodium Dodecyl Sulfate-modified Carbon Paste Electrodes for Selective Determination of Dopamine in the Presence of Ascorbic Acid. Bioelectrochemistry. 2007;70(2):408-15. PubMed PMID: 16843072.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Sodium dodecyl sulfate-modified carbon paste electrodes for selective determination of dopamine in the presence of ascorbic acid. AU - Zheng,Jianbin, AU - Zhou,Xiaoli, Y1 - 2006/06/03/ PY - 2006/01/15/received PY - 2006/04/05/revised PY - 2006/05/29/accepted PY - 2006/7/18/pubmed PY - 2007/6/27/medline PY - 2006/7/18/entrez SP - 408 EP - 15 JF - Bioelectrochemistry (Amsterdam, Netherlands) JO - Bioelectrochemistry VL - 70 IS - 2 N2 - A carbon paste electrode (CPE) modified by a monolayer film of sodium dodecyl sulfate (SDS) was used for detection of dopamine (DA). Cyclic voltammetry demonstrated improved response of the DA sensor. This suggests the effectivity of surface modification of CPE by SDS. Impedance spectroscopy was used for the characterization of CPE surface properties. The effect of SDS concentration on the electrode quality also reveals that SDS formed a monolayer on CPE surface with a high density of negative-charged end directed outside the electrode. As a result, the carbon paste electrode modified with SDS (SDS/CPE) exerted discrimination against ascorbic acid in physiological circumstance. Thus, it can selectively determine dopamine even in the presence of 220-fold AA combined with differential pulse stripping voltammetry. In pH 7.40 phosphate buffer solution, the oxidation peak current on differential pulse voltammograms increases linearly with the concentration of DA in the range of 5.0 x 10(-7) to 8.0 x 10(-4) mol . L(-1) with a detection limit of 5.0 x 10(-8) mol . L(-1). Satisfying results are achieved when detecting the DA in injection and simulated biology sample. SN - 1567-5394 UR - https://www.unboundmedicine.com/medline/citation/16843072/Sodium_dodecyl_sulfate_modified_carbon_paste_electrodes_for_selective_determination_of_dopamine_in_the_presence_of_ascorbic_acid_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S1567-5394(06)00088-0 DB - PRIME DP - Unbound Medicine ER -