摘要
The authors had reported the determination of ephedrine by osillopolarography.In acetate buffer（pH 4.0） ephedrine reacted with nitrite to form N-nitrosoephedrine.The reaction needed only 2 minutes with a boiling water bath.After removing excessive nitrite,N-nitrosoephedrine gave a well polarographic reductive wave at -0.82V（vs.SCE） in acidic medium.The linear relationship between the concentrations of ephedrine and the peak currents of the osillopolarographic wave was proportional in the range of 0.10～200×10-6 （g/mL.）The method was sensitive,rapid and simple.It had been applied to determine ephedrine in pharmaceuticals with satisfactory results.
The authors had reported the determination of ephedrine by osillopolarography.In acetate buffer(pH 4.0) ephedrine reacted with nitrite to form N-nitrosoephedrine.The reaction needed only 2 minutes with a boiling water bath.After removing excessive nitrite,N-nitrosoephedrine gave a well polarographic reductive wave at -0.82V(vs.SCE) in acidic medium.The linear relationship between the concentrations of ephedrine and the peak currents of the osillopolarographic wave was proportional in the range of 0.10～200×10^(-6) (g/mL.)The method was sensitive,rapid and simple.It had been applied to determine ephedrine in pharmaceuticals with satisfactory results.
出处
《四川大学学报（自然科学版）》
CAS
CSCD
北大核心
2004年第1期218-220,共3页
Journal of Sichuan University(Natural Science Edition)
关键词
盐酸麻黄碱
单扫描示波
中药
极谱测定
ephedrine hydrochloride
pharmaceutical analysis
single-sweeping osillopolarography
