Thermal characterization of warifteine by means of TG and a DSC photovisual system

被引：9
|
作者：
Aragao, CFS [1 ]
Barbosa-Filho, JM [1 ]
Macêdo, RO [1 ]
机构：
[1] Univ Fed Paraiba, Lab Tecnol Farmaceut, BR-59059900 Joao Pessoa, Paraiba, Brazil
来源：
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2001年 / 64卷 / 01期
关键词：
DSC photovisual; TG; warifteine;
D O I：
10.1023/A:1011593214548
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
This work proposes thermal characterization as analytical methodology for the identification and purity assay of warifteine, an alkaloid in Cissampelos sympodialis Eichl. Thermal and kinetic parameters were determined by means of TG and DSC photovisual studies. The TG results showed that the decomposition of warifteine in air and nitrogen atmospheres proceeds in three and four steps, respectively. The TG data allowed calculation of the kinetic parameters of warifteine. The activation energy values obtained by different methods displayed a good correlation. With the DSC photovisual system applied it is possible to detect the impurity level in warifteine after its purification.
引用
收藏
页码：185 / 191
页数：7
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