Determination of Theine and Theinein Aminophylline by Oscillographic Titration
- 1997年第3卷 
示波极谱滴定法测定茶碱的含量①孟昭仁战永复（吉林师范学院化学系吉林１３２０１３）茶碱系１．３—二甲基嘌呤，氨茶碱系茶碱和乙二胺的复盐，前者为强心利尿药，后者为止喘药，其含量测定方法文献报道皆为重量法［１］，但操作繁琐．本文采用示波极谱滴定法测定茶碱类...In this paper, a method is described for the determination of theine and theine in aminophglline by oscillographic titration. The theine or theine in amimophylline and AgNO 3 can make precipitation quantitatively. The quantitative and excess AgNO 3 is added in it, when reaction has been completed, the residual AgNO 3 can be carred out directly by oscillographic titrimetry with DDTC as titrant. Trace DDTC can make a slot on oscillogram of mercury membrane and silver electrodes. Using DDTC standard solution to titrate, that is the slot appearing. It can be used to indicate end point sensitively. The characteristics of the method are being quick and exact, easy to observe the final result and saving materials.