嵌入式超薄微晶纤维素/碳糊电极的构建及应用  

Fabrication of Inlaid Super-thin Microcrystalline Cellulose Modified Carbon Paste Film Electrode and Its Application

作　　者：汪振辉[1] 黄爱平[1] 乔海燕[1] 陈体伟[1] 王栋[1] 

机构地区：[1]河南师范大学化学与环境科学学院,新乡453007

出　　处：《应用化学》2009年第7期840-844,共5页Chinese Journal of Applied Chemistry

基　　金：国家自然科学基金资助项目(20675026)

摘　　要：以镍铬合金为基体,在其表面通过直接嵌入微晶纤维素修饰的碳糊膜,构建了嵌入式超薄微晶纤维素/碳糊电极(ISM/CPE)。用扫描电子显微镜和循环伏安法表征了电极的特性;以抗坏血酸(AA)为目标物考察其在该电极上的电化学行为。结果表明,在ISM/CPE上,AA的氧化峰电位为0.38V,较传统碳糊电极负移了0.05V;峰电流与AA的浓度在1.0×10-6～1.0×10-3mol/L范围内呈良好线性关系,相关系数r=0.9993,检测限(S/N=3)为7.5×10-7mol/L。表明合金表面嵌入的超薄微晶纤维素/碳糊膜,改变了基体电极的电化学性质,可用于实际样品中AA的测定。A novel inlaid super-thin microcrystalline cellulose modified carbon paste film electrode （ISM/ CPE） was fabricated by direct inlaying microcrystalline cellulose modified carbon paste film on the surface of nichrome substrate. The characteristics of ISM/CPE were investigated by scanning electron microscopy （SEM） and cyclic voltammetry. The electrochemical behavior of the electrode was examined with ascorbic acid（AA） as an object. The oxidation peak potential（Epa） of AA was observed at 0.38 V, which was shifted by 0. 05 V negatively compared to the Epa at the conventional carbon paste electrode. The oxidation peak current was linearly proportional to the concentration of AA in a range of 1.0 × 10^ -6 - 1.0 × 10 ^-3 mol/L with a correlation coefficient of 0. 999 3 and a detection limit（ S/N =3 ） of 7.5 ×10^-7 mol/L, showing that the electrochemical properties of the substrate electrode were changed after super-thin microcrystalline cellulose modified carbon paste film was inlaid and it could be applied to the determination of AA in real samples.

关 键 词：微晶纤维素 嵌入式超薄碳糊膜电极 伏安法 抗坏血酸 

分 类 号：O657.1[理学—分析化学]