A new electrochemical method for the determination of trace molybdenum(VI) using carbon paste electrode modified with sodium dodecyl sulfate

2011 ◽  
Vol 661 (2) ◽  
pp. 367-373 ◽  
Author(s):  
Pei-hong Deng ◽  
Yong-lan Feng ◽  
Jun-jie Fei
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Carbon Paste Electrode ◽  
Electrochemical Method ◽  
Sodium Dodecyl ◽  
Carbon Paste ◽  
Dodecyl Sulfate ◽  
Paste Electrode

scholarly journals 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

2012 ◽  
Vol 10 (6) ◽  
pp. 1824-1829 ◽  
Author(s):  
Sayed Ghoreishi ◽  
Mohsen Behpour ◽  
Mona Delshad ◽  
Asma Khoobi
Keyword(s):  
Carbon Nanotubes ◽  
Uric Acid ◽  
Sodium Dodecyl Sulfate ◽  
Carbon Paste Electrode ◽  
Sodium Dodecyl ◽  
Carbon Paste ◽  
Dodecyl Sulfate ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Paste Electrode

AbstractTyrosine (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.

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