氨基－β－环糊精-单壁碳纳米管－二茂铁修饰电极对抗坏血酸的电化学行为研究

In this paper, firstly, amino-β-cyclodextrin (NH2-β-CD) was synthesized. And then a stable inclusion compound between ferrocene (Fc) and NH2-β-CD was prepared via host-guestreaction. Furthermore, the inclusion compound was combined with single-walled carbon nanotubes (SWCNTs) and used to modify bare glass carbon elecrtrode. Finnally, the modified electrode (NH2-β-CD/Fc/SWCNTs) was used to study electrochemical behaviors of ascorbic acid (AA) utilizing cyclic voltammetry. The result indicated a good linear relationship between value of peak current change and concerntration of AA at range of 1×10^(-5)~1×10^(-3) mol/L in pH=7.0 phosphate buffer solution(PBS) at range of-0.2~0.6V,detection limit is 3.6×10^(-7) mol/L. when the modified eletrode was used to determine the simulation sample, the recovery of AA in standard solution is 98.3%~100.8%,the satisfied results were obtained.