精品文档---下载后可任意编辑中药益智仁的化学成分讨论的开题报告摘要：益智仁是一种常用的中药材，具有改善记忆、促进血液循环等作用。本文旨在对益智仁的化学成分进行讨论，包括主要化学成分的提取、分离、鉴定和定量分析。首先，通过超声波提取法提取益智仁的总黄酮类化合物，采纳硅胶柱层析法进行分离纯化，并用高效液相色谱法鉴定化合物的结构。其次，应用气相色谱-质谱联用技术对益智仁挥发油进行分析，并对主要挥发成分进行定量分析。最后，在对益智仁中主要化学成分的定量分析基础上，通过比对不同产地和采收季节的益智仁化学成分差异，探讨其生长环境、采收方式等因素对化学成分的影响。关键词：益智仁，化学成分，提取，分离，鉴定，定量分析Abstract:Yizhiren is a commonly used traditional Chinese medicine, which has the effect of improving memory, promoting blood circulation and so on. The purpose of this article is to study the chemical composition of yizhiren, including the extraction, separation, identification and quantitative analysis of the main chemical components.Firstly, the total flavonoids of yizhiren were extracted by ultrasound extraction method, and purified by silica gel column chromatography. The structure of the compounds was identified by high-performance liquid chromatography. Secondly, gas chromatography-mass spectrometry was used to analyze the volatile oil of yizhiren, and the main volatile components were quantitatively analyzed.Finally, based on the quantitative analysis of the main chemical components of yizhiren, the differences in chemical composition of yizhiren from different producing areas and harvesting seasons were compared to explore the effects of growth environment, harvesting method and other factors on chemical composition.Keywords: Yizhiren, chemical composition, extraction, separation, identification, quantitative analysis.
