4-(3-吡啶基)-2-巯基咪唑修饰金电极对芦丁和槲皮素的电催化作用及其同时测定  

The electrocatalytic oxidation of rutin and quercetin at a Au electrode modified with 4-(3-pyridyl)-2-mercapto imidazole self-assembled monolayer and their simultaneous determination

作　　者：王明艳[1,2] 许兴友[1,2] 马卫兴[1] 曹志凌[1,3] 许瑞波[1] 

机构地区：[1]淮海工学院化学工程学院,连云港222005 [2]南京理工大学材料化学实验室,南京210094 [3]北京理工大学化学工程学院,北京1000811

出　　处：《分析试验室》2009年第11期45-47,共3页Chinese Journal of Analysis Laboratory

基　　金：江苏省海洋生物技术重点建设实验室(2007HS009);淮海工学院自然基金(2008HGXK016)项目资助

摘　　要：利用分子自组装技术制备了4-（3-吡啶基）-2-巯基咪唑（PMI）修饰金电极。采用一阶微分线性扫描伏安法同时测定芦丁和槲皮素的含量,发现两氧化峰相差200 mV左右。在优化条件下,在共存溶液中当芦丁及槲皮素分别在5.0-100.0μmol/L和10.0-150.0μmol/L浓度范围内,其氧化峰电流与浓度有良好的线性关系,检出限分别为1.0μmol/L和2.0μmol/L。此法可用于杜仲叶中芦丁和槲皮素含量的测定。A gold electrode modified with 4-（3-pyridyl）-2-mercapto imidazole was fabricated by molecule self-assembled technique. In the pH 6.8 phosphate buffer solution, the modified electrode gave two well defined oxidation peaks for rutin and QUE in a mixed solution with a peak potential difference of almost 200 inV. The oxidation peak currents had good linear relationship with the concentrations in the ranges of 5.0- 100.0μmol/L for rutin and 10.0- 150.0 μmol/L for QUE through the first order differential linear sweep vohammetry, respectively. The detection limits were 1.0 μmol/L for rutin and 2.0 μmol/L for QUE. This electrode was used for rutin and QUE determinations in eucommia ulmoides leave samples with satisfactory results.

关 键 词：自组装 4-(3-吡啶基)-2-巯基咪唑 芦丁 槲皮素 同时测定 

分 类 号：O657.1[理学—分析化学]