纳米金/三聚氰胺修饰电极检测亚硝酸盐  

Determination of nitrite by a nano-Au /melamine modified electrode

作　　者：张英[1] 张述林[2] 向珍[1] 任旺[1] 孙延春[1] 蔡述兰[1] 

机构地区：[1]四川理工学院化学与制药工程学院,自贡643000 [2]四川理工学院材料与化学工程学院,自贡643000

出　　处：《分析试验室》2013年第6期63-67,共5页Chinese Journal of Analysis Laboratory

基　　金：四川省教育厅青年基金科研项目(10ZB102);绿色催化四川省高校重点实验室基金项目(LYJ1103);材料腐蚀与防护四川省重点实验室基金(2011CL07);四川理工学院科技项目(2010XJKYL004;2011KY04)资助

摘　　要：采用电聚合方法制备三聚氰胺(MA)膜修饰玻碳电极(GCE),然后采用原位恒电位沉积法制备金纳米颗粒(Au),并将其修饰于膜电极表面,制得纳米金/三聚氰胺修饰玻碳电极(Au/MA/GCE)。用扫描电子显微镜(SEM)对修饰电极进行表面形貌和元素成分分析。用循环伏安法研究亚硝酸根(NO2-)在该修饰电极上的电化学行为发现,NO2-在0.85 V出现一灵敏的氧化峰。在优化的实验条件下,NO2-在1.0×10-5～1.0×10-3mol/L浓度范围内与其氧化峰电流成线性关系,检测下限为8.9×10-7mol/L。将修饰电极用于实际样品中NO2-的检测,效果良好。A nano-Au/melamine film modified glassy carbon electrode （Au/MA/GCE） was fabricated by electropolymerization of melamine （MA） and then potentiostatic deposition of Au nanoparticles （Au）, which were produced through the in situ reduction of Aum. The surface topography and elemental analysis of the modified electrode were eharacterized by scanning electron microscopy （SEM）. The electrochemical behavior of nitrite at the modified electrode was investigated assay results indicate that the proposed sensor by cyclic voltammetry （CV）. Under the optimal conditions, the exhibits a sensitive oxidation peak to nitrite at 0. 85 V. The oxidation peak current （ ipa ） increases linearly with the concentration of nitrite from 1.0×10%-5～1.0×10^-3mol/L with a detection limit of8.9×10^-7mol/L. The modified electrode can be applied to the analysis of nitrite in real samples with good results.

关 键 词：三聚氰胺 纳米金 修饰电极 亚硝酸根 

分 类 号：O657.1[理学—分析化学]