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摘要黄芩苷是黄芩的有效成分之一，如何提高其得率一直是实际生产中存在的问题。本文研究了黄芩中的有效成分黄芩苷并且研究了最佳提取工艺，以黄芩苷的得率等为指标，对煎煮法、醇提取法、超声波提取法3种方法进行比较研究。结果表明：超声波法和醇提取法的黄芩苷收率较高。超声提取是一种提取率较高、操作简便，省时的提取中草药有效成分的新方法。
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通过实验得出了超声波提取黄芩中黄芩苷的较佳工艺条件，详细讨论了影响黄芩苷提取率的实验条件。最佳条件如下：超声提取时间为30min，超声功率为250W，超声提取温度为80℃。在最佳工艺条件下，黄芩苷得率为8.40％，与煎煮法、醇提取法相比，黄芩苷的得率明显提高。33690
关键词 黄芩 黄芩苷 提取工艺 超声提取
毕业论文设计说明书外文摘要
Title Study on experiment of ultrasonic extracting baicalin from Scutellaria beaicalensis geori
Abstract
Baicalin is one of the main ingredients with activity in Scutellaria baicalin georgi.How to improve the obtaining ratio and content of Baicalin in extracting process is always a problem inpractical prodauction.The effective components of baicalin from Scutellaria baicalin geori and their extraction technology was studied in this dissertation.The baicalin rate extracted by three methods(The method of boiling,the alcohol extraction and the ultrasonic extraction) was compared.The results showed that the baicalin recovery rates in the ultrasonic extraction were highest among the three methods.The ultrasonic extractiona method was a new method of extractiong the active constituents in the Traditional Chinese Medicines,which was of high extracting efficiency,simple and time-saving.
The optimum conditions of ultrasonic extraction was obtained by experiment.Effects of experimental conditions on the extraction rate baicalin were discussed in detail.The optimum condition were as followed: ultrasonic extration time 30min,ultrasonic extration power 250w and ultrasonic extration temperature 80℃.Under the optimum conditions ,the average extraction rate of baicalin 8.40％.Compared with the boiling,the alcohol extraction,the extraction rate and content of baicalin prepared by ultrasonic extraction was obviously increased.
Keywords scsutellaria baicalensis georgi baicalin extraction technology ultrasonic extration
目录
1 引言 1
1.1 概况 1
1.2 黄芩苷的理化性质 2
1.3 超声波的机理 3
1.3.1 热作用 3
1.3.2 非热作用 3
1.3.3 超声波作用设备 3
1.3.4 影响超声波提取效率的因素 4
1.4 其它几种方法提取黄芩苷概述 5
1.4.1 醇碱提取法 5
1.4.2 水煎煮提取法 5
1.4.3 微波提取法 5
1.4.4 超滤法一次提取黄芩苷的工艺研究 6
1.5 超声波在中药提取中的应用 6
1.6 提取黄芩苷和黄芩素的基本流程 7
1.7 本论文研究的内容与意义 7
2 实验部分 9
2.1黄芩苷提取方法选择 9
2.2原材料选取 9
2.3 得率的计算公式 9
2.4 超声波提取法 9
2.4.1 实验试剂与仪器 9
2.4.2 实验步骤 10