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Journal
2012 | 10 | 6 | 1824-1829
Article title

Electrochemical determination of tyrosine in the presence of uric acid at a carbon paste electrode modified with multi-walled carbon nanotubes enhanced by sodium dodecyl sulfate

Content
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EN
Abstracts
EN
Tyrosine (Tyr) was quantitated with high sensitivity and selectivity in the presence of uric acid (UA) using a carbon paste electrode modified with multi-walled carbon nanotubes. Tyr and UA were catalytically oxidized with diffusion-controlled characteristics. They were determined simultaneously by differential pulse voltammetry with a potential difference of 350 mV. The electrocatalytic currents increase linearly with Tyr and UA concentrations 4×10−7−1×10−4 M and 3×10−7−2×10−4 M. Their detection limits were 1×10−7 and 5.1×10−8 M respectively. In the presence of sodium dodecyl sulfate the Tyr detection limit improved from 1×10−7 to 6.9×10−8 M. The electrode was successfully used to quantitate Tyr and UA in serum. [...]
Publisher

Journal
Year
Volume
10
Issue
6
Pages
1824-1829
Physical description
Dates
published
1 - 12 - 2012
online
21 - 9 - 2012
Contributors
  • Department of Analytical Chemistry, Faculty of Chemistry, University of Kashan, Kashan, 87317-51167, Islamic Republic of Iran, s.m.ghoreishi@kashanu.ac.ir
  • Department of Analytical Chemistry, Faculty of Chemistry, University of Kashan, Kashan, 87317-51167, Islamic Republic of Iran
author
  • Department of Analytical Chemistry, Faculty of Chemistry, University of Kashan, Kashan, 87317-51167, Islamic Republic of Iran
author
  • Department of Analytical Chemistry, Faculty of Chemistry, University of Kashan, Kashan, 87317-51167, Islamic Republic of Iran
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.-psjd-doi-10_2478_s11532-012-0119-x
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