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

• Authors: Sayed Ghoreishi , Mohsen Behpour , Mona Delshad , Asma Khoobi
• Languages of publication: 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. [...]

Keywords

EN

Tyrosine; Uric acid; Multiwalled carbon nanotube; Voltammetry; Sodium dodecyl sulfate

• Publisher: De Gruyter Open
• Journal: Open Chemistry
• Year: 2012
• Volume: 10
• Issue: 6
• Pages: 1824-1829

Dates

published

1 - 12 - 2012

online

21 - 9 - 2012

Contributors

author

Sayed Ghoreishi

• Department of Analytical Chemistry, Faculty of Chemistry, University of Kashan, Kashan, 87317-51167, Islamic Republic of Iran

author

Mohsen Behpour

• Department of Analytical Chemistry, Faculty of Chemistry, University of Kashan, Kashan, 87317-51167, Islamic Republic of Iran

author

Mona Delshad

• Department of Analytical Chemistry, Faculty of Chemistry, University of Kashan, Kashan, 87317-51167, Islamic Republic of Iran

author

Asma Khoobi

• Department of Analytical Chemistry, Faculty of Chemistry, University of Kashan, Kashan, 87317-51167, Islamic Republic of Iran

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Identifiers

DOI

10.2478/s11532-012-0119-x