CAJ | 학술논문

利用扫描电镜（SEM）和交流阻抗谱法（EIS）对以滴涂法制备的羧基化单壁碳纳米管（SWCNTs-COOH）修饰玻碳电极进行纳米膜特性表征,并采用循环伏安法（CV）研究了氯霉素（CAP）在其上的电化学行为.结果表明,SWCNTs-COOH修饰的玻碳电极对CAP的还原有良好的电催化作用,根据实验结果推测为双质子双电子还原过程,CAP在修饰电极上的扩散系数及反应速率常数分别为8.76×10-4cm2/s及1.64×10-3s-1.在实验优化选定的测试条件下,还原峰（-0.602 V）电流与CAP的浓度在1.55×10-7-1.97×10-5mol/L范围内呈良好线性关系,检出限达2.02×10-8mol/L.相对标准偏差（n=10）为2.24%,可用于氯霉素的含量测定.
이용소묘전경（SEM）화교류조항보법（EIS）대이적도법제비적최기화단벽탄납미관（SWCNTs-COOH）수식파탄전겁진행납미막특성표정,병채용순배복안법（CV）연구료록매소（CAP）재기상적전화학행위.결과표명,SWCNTs-COOH수식적파탄전겁대CAP적환원유량호적전최화작용,근거실험결과추측위쌍질자쌍전자환원과정,CAP재수식전겁상적확산계수급반응속솔상수분별위8.76×10-4cm2/s급1.64×10-3s-1.재실험우화선정적측시조건하,환원봉（-0.602 V）전류여CAP적농도재1.55×10-7-1.97×10-5mol/L범위내정량호선성관계,검출한체2.02×10-8mol/L.상대표준편차（n=10）위2.24%,가용우록매소적함량측정.
By using the scanning electron microscopy（SEM） and the electrochemical impedance spectroscopy（EIS） construct surface features of the single-walled carbon nanotubes with carboxyl（SWCNTs-COOH） on the N,N-dimethylformide solution and dropped on the surface of the glassy carbon electrode,and by using cyclic voltammetry（CV） studied the electric chemical behavior of Chloramphenicol.The result showed that the chemically modified electrode of coated glassy carbon electrode（SWCNTs-COOH/GCE） has good electrocatalysis function on reduction of CAP.Based on the results of experiments it was inferred as a two-electron and two-proton transferring process.The property of kinetics including diffusion coefficient（D） and rate constant（k） were 8.76×10-4 cm2/s,1.64×10-3 s-1respectively.On the optimum conditions,linear relationship being 1.55×10-7—1.97×10-5 mol/L with the detection limit of 2.02×10-8 mol/L.The RSD（n=10） of chloramphenicol was 2.24%.The method was applied in the determination real sample of chloramphenicol with satisfactory result.