A sensitive o-aminophenol sensor based on a modified montmorillonite-modified expanded graphite electrode

作者：Wang Zhiliang; Kong Yong^*; Yao Chao; Wang Yu; Ding Xiufeng; Zhou Yongsheng

来源：Applied Clay Science, 2012, 55: 173-176.

DOI：10.1016/j.clay.2011.11.017

• Modified montmorillonite
• Expanded graphite
• o-Aminophenol
• Amperometric sensor

Modified montmorillonite (MMT)-modified expanded graphite electrode (EGE) was used as an amperometric sensor for o-aminophenol determination. The electrochemical behavior of o-aminophenol on the electrodes EGE, MMT-modified EGE and modified MMT-modified EGE was investigated. The response of o-aminophenol was noticeably improved with the modified MMT-modified EGE, which was attributed to the higher accumulation efficiency of modified MMT. The effect of the concentration of the supporting electrolyte was examined, and 0.5 M H2SO4 was finally employed. The calibration curve was linear for o-aminophenol concentrations from 1 to 100 mu M (r = 0.9978) and from 100 to 1000 mu M (r = 0.9984). The detection limit was as low as 0.5 mu M (S/N = 3).

• 出版日期2012-1
• 单位常州大学; 江苏省环境科学研究院