阿魏酸在玻碳电极上的电化学行为及其分析测定

Electrochemical Behavior and Determination of Ferulic Acid at Glass Carbon Electrode

研究了阿魏酸在玻碳电极上的电化学行为,优化了测定参数,建立了一种直接测定阿魏酸的电分析测试方法. 阿魏酸在玻碳电极上于醋酸盐缓冲溶液中于-1.0～1.2 V处产生1对氧化还原峰,氧化峰电流与阿魏酸的浓度在5×10^-5～1×10^-3mol/L之间有良好的线性关系,线性回归方程为： Ip=19.19＋3.515×10^4c,相关系数R为0.994 1,检出限为1×10^-6 mol/L. 适用于中成药中阿魏酸含量的测定,该方法用于逍遥丸中痕量阿魏酸的测定,回收率在95%～106%之间.

Ferulic Acid was studied via cyclic voltammetry and squre stripping voltammetry, the experimental parameters were optimized and a direct electroanalytical method for determining ferulic acid was developed. In the medium of HAc-NaAc （ pH = 5.6）, a pair of sensitive peaks was observed in - 1.0 - 1.2 V （ vs. SCE）. The oxidation peak current was proportional to the concentration of ferulic acid in the range of 5 ×10^-5 - 1×10^-3 mol/L and the detection limit was 1 ×10^-6 mol/L. The method can be applied to the determination of trace ferulic acid in XiaoyaoWan without pretreatment. The recovery was 95% - 106%.