Journal
ANALYTICA CHIMICA ACTA
Volume 445, Issue 1, Pages 35-45Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0003-2670(01)01253-3
Keywords
microwave plasma torch; atmospheric-sampling glow discharge; tandem source; modulated source; mass spectrometry
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A modulated tandem source consisting of a microwave plasma torch and an atmospheric-sampling glow discharge is investigated as a means of generating atomic and molecular mass spectra in a rapid, sequential mariner. Conceptually, the pair operates by using the microwave plasma torch to produce atomic ions, and the atmospheric-sampling glow discharge for production of molecular fragmentation mass spectra. The mass spectra of several volatile organic compounds representative of both atomic and molecular modes of operation are presented, and the latter directly compared to mass spectra produced by an electron-impact ionization source. Unique aspects of the experimental construction and performance of this pair are considered. (C) 2001 Elsevier Science B.V. All rights reserved.
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