摘要
作者发现在乙酸盐缓冲溶液中有H2O2存在时,甘草酸产生了极谱催化波。基于这一发现,拟定了测定甘草酸的新方法。在0.1mol/LNaAc-HAc(pH4.3)最佳废液中,甘草酸极谱催化波峰高与其浓度在8.0×10-7~1.0×10-5mol/L范围内有线性关系。本方法的灵敏度比相同介质无H2O2存在的方法高5倍。
A polarographic catalytic wave of glycyrrhizic acid (GA) is observed when H2O2 is present in acetate buffer solution. Based on this observation, a new method for the determination of GA is established. In 0.1 mol/L NaAc-HAc(pH 4. 3)-0.012 mol/L H2O2 support ing electrolyte solution, the peak height of the first derivative wave of GA is proportional to its concentration in the range of 8.0×10-7~1.0×10-5mol/L. The sensitivity is 5-fold high er in the presence of H2O2 than that without H2O2.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1996年第7期835-837,共3页
Chinese Journal of Analytical Chemistry
基金
国家自然科学基金
陕西省自然科学基金
关键词
甘草酸
有机去极剂
极谱催化法
极谱法
Glycyrrhizic acid, organic depolarizer, polarographic catalytic wave