中文摘要：

利用电沉积制备Ni/Ag/MWNTs修饰电极,加入离子液体（ILs）增加导电性能,应用于饮用水中亚硝酸根的检测。亚硝酸盐在该电极的作用下显示良好的电催化氧化作用,且在微小浓度下也能作出响应。以0.4 V作为工作电压,对亚硝酸根进行安培检测,在1μmol·L^-1~0.05 mmol·L^-1浓度范围内,呈现出良好的线性关系,检测限达到4.6×10^-7mol·L^-1。此外,该电极稳定性和重复性良好,可用于实际水样的检测。

英文摘要：

A Ni/Ag/multi-walled carbon nanotubes modified electrode was fabricated by electrodeposit method and ionic liquids （ ILs） was used to increase the electrical conductivity. This electrode was used to detect nitrite in drinking water. This modified electrode showed an obvious electrocatalytic activity for the oxidation of nitrite, and a response on low concentration of NO-2 . The response of current was linear with the concentration of nitrite from 1 μmol·L^-1 to 0. 05 mmol·L^-1 , and the limit of detection was 4. 6 ×10^-7mol·L^-1 . In addition, this modified electrode exhibited excellent stability and repeatability, and was applied to detect nitrite in real sample with a satisfactory result.