TITLE

Voltammetric Method Using Multi-Walled Carbon Nanotubes Modified Glassy Carbon Electrode for the Determination of Terbutaline Sulfate in Pork Sample

AUTHOR(S)
Wei Xu; Rulin Lei; Wenying Cao; Chunhui Guo; Xiuhua Zhang; Shengfu Wang
PUB. DATE
June 2013
SOURCE
Journal of Analytical Sciences, Methods & Instrumentation;Jun2013, Vol. 3 Issue 2, p75
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Electrochemical properties of terbutaline sulfate (TBS) at the glassy carbon electrode modified with multi-walled car-bon nanotubes (MWNTs) were explored by cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The response was evaluated with respect to pH, scan rate and other variables. Some electrochemical parameters, such as the charge number and proton number, were calculated. The results indicated that TBS underwent irreversible oxidation at the modified electrode, which was an adsorption-controlled process with two protons and two electrons. The reductive peak current of TBS significantly increased and the peak potential shifted negatively at the modified electrode, thus resulting in an electrode for TBS. The current was proportional to the concentration of TBS over 1.12 and 141 µM with a detection limit of 0.34 µM (at S/N = 3). The modified electrode showed good sensitivity, selectivity and stability for the determination of TBS in pork sample.
ACCESSION #
93671047

 

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