2∶1∶5 )的底液中 ,于 -1.703V (vsAg/AgCl )处出现一良好的二阶导数示差脉冲极谱峰 ,其峰幅值与秦皮甲素在0.2～1.6mmol/L范围内呈非常显著的线性关系 (P<0.01 ) ,检测下限为50nmol/L。该法简便、快速、灵敏 ,结果准确
A second _ derivative differential pulse polarography for the quantitative determination of aesculin in Chinese herbal medicine Cortex Fraxini Caulis was developed. A good second _ derivative diffe_rential pulsed polarographic wave at -1.703 V(vs Ag/AgCl) appears in the ethanol -2 mol/L lithium chloride-water(2∶1∶5 by volume) supporting electrolyte. There is a linear relationship between concentration and peak height in the range of 0.2～1.6 mmol/L for aesculin(P<0.01). The limit of determination of the met...