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

• 作者: Chunhui Guo Rulin Lei Shengfu Wang Wei Xu Wenying Cao Xiuhua Zhang
• 来源期刊: 分析科学方法和仪器期刊(英文)
• 学科: 化学
• 关键词: TERBUTALINE Sulfate Multi-Walled Carbon NANOTUBES Β2-AGONIST Electro-Oxidation
• 年，卷（期）: fxkxffhyqqkyw,（2）
• 页码范围: 75-79
• 页数: 5页
• 分类号: O6

摘要

Electrochemical properties of terbutaline sulfate (TBS) at the glassy carbon electrode modified with multi-walled carbon 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.