Title :
Ion mobility spectrometry (IMS)-a chemical separation technique using an electrostatic field
Author :
Roehl, Joseph E.
Author_Institution :
Environ. Technol. Group Inc., Baltimore, MD, USA
Abstract :
The author describes a chemical sensing and discrimination technique called ion mobility spectrometry (IMS), which separates ionic species in a chemical vapor by their mobility in an electrostatic field. An advantage of IMS over other techniques is speed of response. The theory on which IMS is based is presented, and the results of a study of the dynamic response of an IMS cell consisting of a ionization region, a shutter grid, and a drift tube to particular chemicals are reported. Models of reactant ion and product ion behavior and empirical data collected on an IMS and the use of IMS as a chemical alarm are described.<>
Keywords :
chemical variables measurement; electric fields; ion mobility; spectrochemical analysis; IMS; chemical alarm; chemical separation technique; drift tube; dynamic response; electrostatic field; empirical data; ion mobility spectrometry; ionization region; product ion behavior; reactant ion behaviour; response speed; shutter grid; Chemical industry; Chemical technology; Electrostatics; Instruments; Ionization; Laboratories; Organic chemicals; Plasma measurements; Spectroscopy; Toxic chemicals;
Conference_Titel :
Industry Applications Society Annual Meeting, 1989., Conference Record of the 1989 IEEE
Conference_Location :
San Diego, CA, USA
DOI :
10.1109/IAS.1989.96944
