پديدآورندگان :
Alinoori Amir Hossein ah.alinoori@isrc.ac.ir Spectrometry and microelectronic devises department, Institute of Material and Energy, Iranian Space Research Center, Isfahan, Iran; , Hajialigol Saeed Spectrometry and microelectronic devises department, Institute of Material and Energy, Iranian Space Research Center, Isfahan, Iran , Amoozgar Fariborz Spectrometry and microelectronic devises department, Institute of Material and Energy, Iranian Space Research Center, Isfahan, Iran , Narimani Seyed Mahdi Spectrometry and microelectronic devises department, Institute of Material and Energy, Iranian Space Research Center, Isfahan, Iran , Sheikhbahaee Hamed Spectrometry and microelectronic devises department, Institute of Material and Energy, Iranian Space Research Center, Isfahan, Iran , Sadeghian Kerdabadi Kamal Spectrometry and microelectronic devises department, Institute of Material and Energy, Iranian Space Research Center, Isfahan, Iran , Masjedi Esfahani Majid Spectrometry and microelectronic devises department, Institute of Material and Energy, Iranian Space Research Center, Isfahan, Iran , Saliminezhad Farkhondeh Spectrometry and microelectronic devises department, Institute of Material and Energy, Iranian Space Research Center, Isfahan, Iran
كليدواژه :
Ion mobility spectrometer (IMS) , Nonlinear ion trap , Organic particles detection , Instrumentation
چكيده فارسي :
A nonlinear novel ion source ion trap interface for an ion mobility spectrometer has been developed for sliding generation, accumulation and focusing of ions produced by Ni63 ionization. The interface improves sensitivity efficiencies compared conventional IMS by factors of 50-90. With these improvements, it is possible to increase in detection limits of analytes. We demonstrate the approach for several narcotics and an assessment of the detection limits is given. Additionally, we demonstrate the utility of the approach in the field of narcotics detection. Based on this approach a portable ion trap ion mobility spectrometer (IMS) was designed and fabricated in Institute of Materials and Energy[1]. This design consists of Fast Sampling and Injecting (FSI) system coupled with ion trap IMS. FSI design provides fast and easily applied method for real time injection of real sample accompanied by particles with no additional sample preparation. Required analysis cycle time for each run is less than 15 sec. The high sample load and sharp injection decrease the peak widths, and improve detection limits[2]. In addition for coupling of ion trap to IMS detector and other considerations in hardware design, miniaturization of IMS cell was done to increase sensitivity and selectivity and decrease warm up time. Data analysis was enhanced with adapted short time Fourier transform algorithm[3]. This homemade customized instrument is an alternative to other time consuming technologies for monitoring of organic particles in real samples without sample preparation.
