利用TGA-DTA热分析法快速鉴别中药乳香及质量分析研究  

Rapid Identification and Quality Analysis of Olibanum by TGA-DTA Thermal Analysis

作　　者：魏永恒[1] 郑志全[1] 罗菊元 金国航 陈功森[1] 李燕呢[1] 李鑫洁 石晋丽[1] Wei Yongheng Zheng Zhiquan Luo Juyuan Jin Guohang Chen Gongsen Li Yanni Li Xinjie Shi Jinli(School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100102, China)

机构地区：[1]北京中医药大学中药学院,北京100102

出　　处：《世界科学技术-中医药现代化》2017年第4期629-635,共7页Modernization of Traditional Chinese Medicine and Materia Medica-World Science and Technology

基　　金：北京市共建项目(BJGJ1634):基于DSC热分析技术结合快速元素分析技术对树脂类中药乳香真伪;等级;产地区分效果影响研究;负责人:罗菊元

摘　　要：目的:利用TGA-DTA热分析法快速鉴别中药乳香,并进行质量分析。方法:收集市场上乳香药材共计25份,通过考察升温范围、升温速率、粉末粒度三个重要因素对TGA-DTA热分析实验的影响,利用TGA-DTA特征图谱快速鉴别药材真伪;分别采用一阶中点法和连线法进行热重分析与热焓计算,对乳香药材进行定量分析。结果:确定了乳香TGA-DTA实验的最佳条件:升温范围选择50-750℃;升温速率选择20℃·min-1;粉末过100目筛;在该条件下,通过特征峰位(T1=447±5℃、T2=549±5℃、T3=350±5℃)、热重分析(TV-max、ΔW2+ΔW3)、热焓分析(ΔH)可以很好的区分正品乳香、伪品乳香以及乳香的掺伪品。结论:TGA-DTA技术操作简单,是一种快速、准确、简单的乳香鉴别与质量分析新方法。This study was aimed to quickly identify Chinese medicine Olibanum. Thermal analysis method was used on the quality analysis of Chinese materia medica （CMM）. A total of 25 batches of Olibanum on the market were collected. This study examined three important factors of temperature range, heating rate, powder mesh on the TGA and DTA thermal analysis experiments. And a method of rapid authentication of medicinal materials using TGA and DTA feature maps was built. Methods of the first-order points, connection on thermogravimetric analysis and heat enthalpy calculation were adopted in the quantitative analysis of Olibanum. The results showed that the best condition of TGA and DTA experiment on Olibanum was confirmed. The temperature range is 50-750-C. The heating rate is 20℃·min^-1. The powder mesh is 100 mesh. Under these conditions, good quality goods of Olibanum, counterfeit Olibanum and adulterants of Olibanum could be distinguished through the characteristic peak （T1=447 ± 5℃, T2=549 ± 5℃, T3=350 ± 5℃）, thermogravimetric analysis （Tv AW2＋AW3） and thermal enthalpy analysis （AH）. It was concluded that the TGA-DTA technology was simple. It was thought to be a rapid, accurate and simple new method for Olibanum identification and quality analysis.

关 键 词：乳香 热分析 快速鉴别 质量分析 

分 类 号：R286.0[医药卫生—中药学]