离子迁移谱技术及其在毒品和爆炸物检测中的应用

发布时间：2018-05-12 15:28

  本文选题：离子迁移谱 + 迁移管　； 参考：《华东师范大学》2006年硕士论文

【摘要】：离子迁移谱技术是一种便携式，灵敏度高的对微量有机物进行分析的技术，广泛应用在毒品、爆炸物探测和环境污染监测等方面。 本文主要介绍了公安部第三研究所自行研制的离子迁移谱仪。介绍了离子迁移谱技术的基本理论和发展情况；描述了仪器的基本结构，对各个主要部分进行了详细介绍；并简要介绍了迁移管中离子—分子的反应过程，讨论了反应物的选择问题。针对仪器实际应用中因为温度、气压和迁移电压变化导致谱线位置变化的问题，在前人的研究基础上，改进实验方案，得到了更精确的气压补偿系数。 本文还对仪器分辨率进行了探讨，对离子门电压和门宽与分辨率的关系作了实验验证，得到了适合我们仪器的最优值；对迁移电场做了计算机模拟，发现我们仪器的电场比较均匀，说明仪器的结构比较合理。 最后，，我们应用仪器对一些毒品和爆炸物进行了实验分析，在迁移温度140℃下，都能够得到这些样品的谱图和迁移率，成功实现了样品的定性检测，并对实验结果做了一定分析。对一些爆炸物的混合物作了分离实验，结果表明仪器可以有效的分离这些混合物，最终建立了样品的折合迁移率数据库。
[Abstract]:Ion transfer spectroscopy is a portable and sensitive analytical technique for trace organic matter, which is widely used in drug, explosive detection and environmental pollution monitoring. This paper mainly introduces the ion migration spectrometer developed by the third institute of the Ministry of Public Security. The basic theory and development of ion transfer spectroscopy are introduced, the basic structure of the instrument is described, the main parts are introduced in detail, and the reaction process of ions and molecules in the migration tube is briefly introduced. The selection of reactants is discussed. In order to solve the problem that the change of spectral line position is caused by the change of temperature, pressure and migration voltage in the practical application of the instrument, the experimental scheme is improved on the basis of previous studies, and a more accurate compensation coefficient of pressure is obtained. In this paper, the resolution of the instrument is also discussed, the relationship between the ion gate voltage and the gate width and the resolution is experimentally verified, the optimum value suitable for our instrument is obtained, and the transfer electric field is simulated by computer. It is found that the electric field of our instrument is more uniform, which indicates that the structure of the instrument is reasonable. Finally, we used the instrument to analyze some drugs and explosives. At the transfer temperature of 140 鈩

本文编号：1879137