摘要
首次发现了齐墩果酸在中性介质中有较强的电致化学发光行为,其电致化学发光强度受电化学参数和发光条件的影响。详细考察了各种影响因素,确立了最佳发光条件,即+2.0V电压,1.0mol/lKCL体系,H2O2浓度为1.5×10-3mol/L。在这个条件下,齐墩果酸的电致化学发光强度与它的浓度在4.38×10-7￣4.38×10-5mol/L范围内呈现良好的线性关系,检出限达到2.0×10-7mol/L,从而提供了电致化学发光测定齐墩果酸含量的方法。
It has been found that oleanlic acid gives ECL emission at Pt electrode when the applied potentials were over 0.8 V （vs. Ag/AgCl）. The ECL intensity was greatly influenced by the electrochemical parameters. The strongest ECL signal was observed in 1.0 mol/L KCL solution, which pH is 7.0. And adding H2O2 could catalyze its signal. Under optimum conditions the ECL intensity has a linear relationship witwh the concentration of oleanlic acid in the range of 4.38 × 10^-7- 4.38 × 10^-5 mol/L. The detection limit was 2.0 × 10^-7 mol/L.
出处
《上海化工》
CAS
2005年第9期16-19,共4页
Shanghai Chemical Industry
关键词
电致化学发光
齐墩果酸
Electrogenerated chemiluminescence
Oleanlic acid
