Optimize The Design And Application Of Ion Mobility Spectrometer

Currently, many research institutions in some countries have been developing high sensitive detecting methods for danger and environmental pollutants. Ion mobility spectrometry (IMS) is a new method for detecting the trace amount substance. It is developed quickly and widely in many fields because of its low detection limits, simple instrumentation, small volume, light weight, low power, high sensitivity and short analyzing time and the fact that it can be operated at atmospheric pressure. It is just the real-time monitoring, sensitivity, selectivity, and response speed that makes this technique preferable to other monitoring methods.It is developed quickly and widely in many fields because of its low detection limits, simple instrumentation, small volume, light weight, low power, high sensitivity and short analyzing time and the fact that it can be operated at atmospheric pressure. It is just the real-time monitoring, sensitivity, selectivity, and response speed that makes this technique preferable to other monitoring methods.The main contents are summarized as follows:1. The paper gives an introduction to the principle and system configuration of a laser ionization source for ion mobility spectrometry, the theory of ion mobility and resolution are considered. The IMS that was designed independently in our laboratory is introduced.2. By detecting the trace amount toluene, the method of using an ion mobility spectrometer equipped with a laser ionization source to detect trace amount substance is researched. The ion mobility spectrometer has been optimized. The length of the mobility tube and the intensity of the electric field have been adjusted to optimum, and the relationship of the drift signal and the sample concentration has been studied. The result shows that the method is effectual, and the sensitivity is extremely high.3. By detecting toluene, Xylene, ammonia and their mixture, we can conclude that IMS is an effective method for detecting environmental pollutants. The advances of IMS technology and the applications of IMS in environmental monitoring are described in detail.Conclusions and future work are summarized: the application of IMS to environmental studies has been recognized, and we get the conclusion that IMS is an effective method for the trace amount substance, and that IMS technology has great practical value.