大黄游离羟基蒽醌的TG-DTA分析  

Characteristics of Thermal Analysis Patterns of Free Anthraquinones from Rheum

作　　者：张黎明[1] 李霞[1] 曹井国[1] 

机构地区：[1]天津科技大学生物工程学院,天津300222

出　　处：《应用化学》2006年第9期1058-1060,共3页Chinese Journal of Applied Chemistry

基　　金：天津市高等学校科技发展基金项目(20031210)

摘　　要：以1,8-二羟基蒽醌为对照,利用热重-差热分析仪对从大黄中分离纯化的游离羟基蒽醌(大黄酸、大黄素、芦荟大黄素、大黄素甲醚和大黄酚)进行了测定,得到这些样品的热分析图谱。通过对其进行特征分析,结果表明各样品的TG曲线形状基本一致,但由于各单体中的1,8-二羟基蒽醌上所带基团不同,有不同的失重情况;所有苷元的DTA曲线都有2个明显的特征峰,但其峰形、峰位置和大小有明显的区别,因此可以用热重-差热分析法来鉴定从大黄药材分离纯化的游离羟基蒽醌。In comparison with those of 1,8-dihydric anthraquinones, the characteristic TG-DTA curves of the free anthraquinones （ Rhein, Emodin, mined. The results showed that they attached on the 1,8-dihydrox anthraqu Aloe-emodin, Chrysophanol and Physcion） from Rheum were deterhad similar TG curves. However, due to the different substituents inones, each sample had different weight loss. On the DTA curves of free anthraquinones, there are two obviously characteristic peaks, while there are obviously differences between their curve shapes, peak location and peak values, therefore, free anthraquinones distilled and sublimated from Rheum can be determined by TG-DTA.

关 键 词：大黄 游离羟基蒽醌 热重法(TG) 差热分析(DTA) 

分 类 号：O642.1[理学—物理化学]