摘要
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%.
出处
《应用化学》
CAS
CSCD
北大核心
2006年第5期566-569,共4页
Chinese Journal of Applied Chemistry
关键词
阿魏酸
溶出伏安法
循环伏安法
电化学分析
ferulic acid, cyclic vohammetry, squre stripping voltaammetry, electrochemical analysis