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Analysis of Gaseous Compounds Using Differential Mobility Spectrometry and Field Asymetric Waveform Ion Mobility Spectrometry
Authors: Pavlačka Martin | Bajerová Petra | Ventura Karel
Year: 2015
Type of publication: ostatní - článek ve sborníku
Name of source: YISAC 2015: 22nd Young Investigators Seminar on Analytical Chemistry
Publisher name: University of Łódź
Place: Łódź
Page from-to: 46
Titles:
Language Name Abstract Keywords
eng Analysis of Gaseous Compounds Using Differential Mobility Spectrometry and Field Asymetric Waveform Ion Mobility Spectrometry Knowing the detailed chemical composition of gases is vital in many situations in life, screening passengers and their baggage for drugs and explosives at the airport, detecting chemical warfare agents or monitoring pollutants in the air. Ion mobility spectrometry (IMS) is a device that can handle online analysis of these gaseous compounds. The main benefits of this technique are low detection limit for explosives and narcotics, fast response, simplicity and portability. IMS is an analytical technique for distinguishing ions in gaseous phase according to differences in the speed that they migrate through a buffer gas under an influence of electric field. Typically, IMS system operates under low field conditions (less than 1 kV/cm). Drift tube ion mobility spectrometry (DTIMS) and traveling wave ion mobility spectrometry (TWIMS) operates in low field regime. The mainly used miniaturised versions working at high electric field (more than 10 kV/cm) are field asymmetric waveform ion mobility spectrometry (FAIMS) and differential mobility spectrometry (DMS). The most problematic part of DMS/FAIMS instruments is ionisation region, where samples are ionised. The most common ionisation source in FAIMS or DMS is 63Ni. The health risks and problem with legislature of radioactive compounds have led many researches to investigate other ionisation technique. Photoionization and corona discharge as alternatives sources in FAIMS and DMS were used in this research. Ion Mobility Spectrometry; Gaseous Compounds; FAIMS; DMS

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