摘要
研究了氯霉素(CAP)在多壁碳纳米管修饰玻碳电极上的电化学行为.发现在pH=2.0的0.1 mol/LKCl-HCl底液中,CAP在该修饰电极上有一灵敏的还原峰(Ep=-0.36 V vs.Ag/AgCl),峰电流与CAP浓度成正比,线性范围为6.0×10^-6~2.7×10^-4mol/L,检测限达3.0×10^-6mol/L.该方法灵敏、准确,用于模拟样品和实际样品的测定,结果满意.
A sensitive electrochemical method was developed for determination of chloramphenicol (CAP) using a glassy carbon electrode modified with multi-wall carbon nanotubes (MWNTs) film. In 0.1 mol/L KCl-HCl solution of pH 2.0, a sensitive cathodic peak of CAP on the MWNTs modified electrode was obtained at around - 0.36 V (vs Ag/AgCl). Under the optimum conditions, the reduction peak current was linearly proportional with the concentration of CAP over the range of 6.0 × 10^-6 to 2.7 × 10^-4mol/L with a detection limit of 3.0 × 10^-6mol/L. The proposed method is sensitive and accurate, and can be applied to determine CAP in simulated samples and real samples with satisfactory results.
出处
《化学研究》
CAS
2007年第3期83-86,共4页
Chemical Research
关键词
氯霉素
碳纳米管
玻碳电极
修饰电极
循环伏安
chloramphenicol
multi-wall carbon nanotubes
glassy carbon electrode
modified electrode
cyclic voltammetry