Study on Thermal Analysis of Tripterygium wilfordii and Its Counterfeits / 中国药房

ABSTRACT

OBJECTIVE:To provide reference for the identification,processing,processing technology and research for ther-mal decomposition products. METHODS:Thermogravimetry- derivative thermogravimetry (TG-DTG) and differential thermal-de-rivative differential thermal (DTA-DDTA) analysis were conducted to scan thermal spectrum of tripterygium from 3 places and T. hypoglaucum,T. regelii,common counterfeits Actinidia arguta and Vitis quinquangularis,determine 7 medicinal materials,its dregs and extractum,and analyze differential spectrum of T. wilfordii and dregs. RESULTS:The TG-DTG and DTA-DDTA thermal spectrum were not only basically similar to each other but also to their dregs. There was a singlet main characteristics peak at about (299±3)℃ only in the DTG curves of extracts of tripterygium from 3 places and T. hypoglaucum extractum with similar intensity, while T. regelii,counterfeits A. arguta and V. quinquangularis showed multiple peaks,and (299 ± 3)℃ was not the main peak. CONCLUSIONS:The thermal spectrum can not distinguish tripterygium and its counterfeits;extractum DTG curves can do it;suit-able processing temperature of tripterygium was 200-380℃. The study can provide reference for the identification,processing,pro-cessing technology and research for thermal decomposition products.