Determination of mercury using a glassy carbon electrode modified with nano TiO2 and multi-walled carbon nanotubes composites dispersed in a novel cationic surfactant

作者：Mao Airong; Li Hongbo; Cai Zhaosheng; Hu Xiaoya^*

来源：Journal of Electroanalytical Chemistry, 2015, 751: 23-29.

DOI：10.1016/j.jelechem.2015.04.034

• 3-Chlorine-2-hydroxypropyl dimethyl dehydroabietyl ammonium chloride
• Mercury
• Nano TiO2
• Multi-walled carbon nanotubes
• Cationic surfactant

A glassy carbon electrode modified with nano TiO2 and multi-walled carbon nanotubes composites dispersed in a novel cationic surfactant was described for the determination of trace mercury(II) by linear anodic stripping voltammetry. Under optimal experimental conditions, the linear sweep anodic stripping peak current was linear with the concentration of Hg(II) in the range of 0.1-100 mu molL(-1) with a detection limit of 0.025 mu mol L-1. The sensitivity was found to be 3.7014 A/mol L-1. The proposed electrode also showed a high selectivity for mercury in the presence of common potential interfering metal ions. Moreover, the proposed electrode revealed good reproducibility and stability. The proposed method was successfully applied for the determination of Hg(II) in river water and industrial wastewater samples.

• 出版日期2015-8-15
• 单位盐城工学院; 扬州大学