摘  要:有机氯农药是一类全球性环境污染物,对人和牲畜具有致癌、致畸、致突变等作用。有机氯农药由于其半衰期较长，降解慢，在环境中的残留量比较高，严重地影响了我国中药材的质量和出口。本研究以云南地道中药材云黄连为原料，研究中药材中有机氯—滴滴涕农药残留的提取方法，以期得到中药材中有机氯—滴滴涕农药的高效、简便、快速、重复性好的提取方法，为进一步研究地道中药材中有机氯—滴滴涕农药残留提供前期研究基础。

　　有机氯—滴滴涕的提取和检测是用科学的方法从中药材中提取出有机氯—滴滴涕及检测出有机氯—滴滴涕在中药材中的含量的过程。本毕业论文采用超声提取、气相色谱检测法对云黄连中有机氯—滴滴涕含量的提取与测定，验证云黄连中有机氯—滴滴涕的残留量以及此提取法能否较好的从云黄连中提取出有机氯—滴滴涕。通过本实验可以得出，在超声提取DDT中，最佳的一组条件是，料液比为1:10，超声功率为40KHz，95%，超声时间为25min，超声的次数为2次。

关键词：云黄连；有机氯—滴滴涕；超声提取

ABSTRACT:The organic chlorine pesticide is a global pollutant which could cause diseases as cancer, deformity and mutation. And due to its long halflife, slow degradation and high residue rate, the organic chlorine pesticide has strongly influenced the quality and the export of Chinese crude medicines. This research paper uses Yunnan local medicine Coptis Teeta Wall. as raw material, researching the extraction means of organic chlorine residue DDT in Chinese crude medicine, aims at finding a way that is efficient, handy, fast and good-repeatability, thus to lay a foundation to the further research of the filed.

　　 The extraction and analyze of the organic chlorine DDT is a process of using scientific method to extract and analyze the percentage in Chinese crude medicine. This research paper uses Ultrasonic Extraction, Gas Chromatography as methods to extract and analyze the percentage of the organic chlorine DDT in the Coptis Teeta Wall. The purpose of this paper is to analyze the residue of organic chlorine DDT and to prove the means used in the paper is efficient in the extraction. Through the experiment can be concluded that the ultrasonic extraction DDT, in a set of conditions is the best material liquid,ultrasonic power than for for 40 KHz, 95%, ultrasonic time for 25 min, the number of ultrasound for 2 times. 

Key Words: Coptis Teeta Wall, organic chlorine-DDT,Ultrasonic Extraction