摘要:本文对紫藤花采取系统化学研究的方法进行研究,首先对紫藤花进行采集、干燥、粉粹、乙醇加热回流提取,回收溶剂得到乙醇浸膏。再将乙醇浸膏依次通过石油醚和乙酸乙酯萃取。将乙酸乙酯萃取物通过大孔树脂柱层析,选取乙酸乙酯萃取物大孔树脂卸柱组分(G组分)进行进一步的分离纯化。通过反复的凝胶柱层析的方法进一步分离纯化,通过薄层层析检测将相似的组分合并,然后对相似的组分进行蒸馏结晶及重结晶,得到一种比较纯的样品为白色粉末。最后用三氯化铝不显荧光,使用5%硫酸乙醇也不显色,初步鉴定为脂肪酸。57369
毕业论文关键字:紫藤花,乙酸乙酯萃取物,分离,纯化
Abstract:In this paper, wisteria sinensis was studied by chemical research system. First, wisteria sinensis was collecting, drying, crushing and heating reflux extraction with ethanol. Ethanol extract was got with recovering solvent. Second, ethanol extract was extracted by petroleum ether and ethyl acetate. The ethyl acetate extract was eluted by macroporous resin column chromatography, the ethyl acetate extract of macroporous resin discharge column component (G component) was purified further separation by the method of gel column chromatography repeatedly. Similar fractions were incorporated by TLC detection. Similar components were disposed by distillation crystallization and recrystallization, White powder was obtained. Finally, Aluminium chloride could not make samples showed fluorescence, 5% sulfuric acid ethanol could not make color. Sample was tentatively identified as fatty acid.
Keywords: flowers of wisteria, the ethyl acetate extract, separation, purification
目 录
1 前言4
2.1 紫藤的研究概况4
2.2 黄酮类化合物的研究概况5
3 材料与方法8
3.1 材料、仪器与试剂8
3.2 试验与方法9
4 大孔树脂乙酸乙酯卸柱组分的分离纯化过程11
4.1 薄层层析11
4.2 葡聚糖凝胶SepadexLH-20的柱层析12
5 结果与分析14
5.1 对抽滤后纯化出的样品进行薄层层析14
5.2 分离出的结晶14
结论15
参考文献16
致谢17
1 前言
紫藤(Wisteria sinensis)别名藤萝、朱藤、木笔子、藤花,古称虎豆、虎櫐、欇,为豆科紫藤属落叶攀援缠绕性藤本植物,是原产我国的著名观花木质藤本,全国各地均有分布和栽培,生于阳坡、林缘、溪边、旷地、灌木丛中。暮春时节开花,形如蝶,色堇紫,芳香清雅,缨络垂挂,如锦似霞[1]。
紫藤不仅具有较高的园林应用价值,而且还具有很好的经济价值和医药价值,紫藤的茎皮、花及种子皆可入药,可治疗多种疾病[2]。
本文对紫藤花进行了采摘、提取、萃取,并对乙酸乙酯萃取物大孔树酯乙酸乙酯卸柱组分(G组分)进行了进一步的分离纯化。
2 文献综述
2.1 紫藤的研究概况
2.1.1 紫藤的形态特征
落叶攀援缠绕性大藤本植物,干皮深灰色,不裂。嫩枝暗黄绿色密被柔毛,冬芽扁卵形,密被柔毛。一回奇数羽状复叶互生,小叶对生,有小叶7~13枚,卵状椭圆形,先端长渐尖或突尖,叶表无毛或稍有毛,叶背具疏毛或近无毛,小叶柄被疏毛,侧生总状花序,长达30~35厘米,呈下垂状,总花梗、小花梗及花萼密被柔毛,花紫色或深紫色,花瓣基部有爪,近爪处有2个胼胝体,雄蕊10枚,2体(9+1)。荚果扁圆条形,长达10~20厘米,密被白色绒毛,种子扁球形、黑色。花期4~5月,果熟8~9月。