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Resistively heated temperature programmable silicon micromachined gas chromatography with differential mobility spectrometry

journal contribution
posted on 2012-09-01, 00:00 authored by J Luong, E Nazarov, R Gras, Robert Shellie, H J Cortes
A microfabricated electromechanical system based on radio frequency modulated ion mobility spectrometry (MEMS-RFIMS), also known as differential ion mobility spectrometry (DMS) has been successfully interfaced to a custom-fabricated resistively heated temperature programmable micromachined gas chromatograph. In contrast to a conventional time-of-flight ion mobility spectrometer, the DMS uses the non-linear mobility dependence in strong radio frequency electric fields for ion filtering. Selective and sensitive detection of targeted analytes of interest can be achieved by using different transport gases, radio frequencies, and associated compensation voltages. In addition, the detection of both positive and negative ions, depending on the ionization mechanism favorable to the analytes involved is achieved. When compared to a stand-alone GC with a non spectrometric detector or a stand-alone DMS, GC-DMS as a hyphenated technique offers two competitive advantages; two orthogonal separating methods in a single analytical system and the resolving power of gas chromatography to minimize charge exchange in the ionization chamber of the detector. In this article, a portable, resistively heated temperature programmable silicon machined gas chromatograph with differential mobility detection is introduced. The performance of the instrument is illustrated with examples of difficult industrial applications.

History

Journal

International journal for ion mobility spectrometry

Volume

15

Issue

3

Pagination

179 - 187

Publisher

Springer

Location

Cham, Switzerland

ISSN

1435-6163

eISSN

1865-4584

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2012, Springer-Verlag

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