Simultaneous Determination of Aromatic Amines by Liquid Chromatography Coupled with Carbon Nanotubes/Poly (3-methylthiophene) Modified Dual-Electrode |
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| Authors: | Xu-Ni Cao Jin-Hua Li Hai-Hong Xu Jia-Rong Zhan Li Lin Katsunobu Yamamoto Li-Tong Jin |
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| Institution: | (1) Department of Chemistry, East China Normal University, Shanghai, 200062, China;(2) Shanghai Chemical Reagent Research Institute, Shanghai, 200333, China;(3) BAS Co. Ltd., No.36-4 1-Chome, Oshiage, Sumida-Ku, 131 Tokyo, Japan |
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| Abstract: | Liquid chromatography with amperometric detection (LC-AD) is developed and applied to simultaneously determine five aromatic amines. In the LC-AD, a new carbon nanotubes/poly(3-methylthiophene) modified dual-electrode is fabricated and then used as the working electrode. It is found that this chemically modified electrode (CME) exhibits efficiently electrocatalytic oxidation for aromatic amines with relatively high sensitivity, stability and long-life. Thus, lower detection in LC-AD can be achieved, which are 4.0 × 10–8 mol L–1 for aniline, 1.6 ×10–7 mol L–1 for 4-nitroaniline, 1.0 × 10–7 mol L–1 for 4-chloroaniline, 1.5 × 10–7 mol L–1 for 1-naphthylamine, 1.7 × 10–7 mol L–1 for 2-bromoaniline. The recoveries of the five analytes are also determined, which range between 0.95 and 1.05 for drinking water, 0.86 and 1.10 for the LiWa River water. |
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| Keywords: | Column liquid chromatography Chemically modified electrode Multi-wall carbon nanotubes Aromatic amines 3-methylthiophene electrodes |
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