Reactive gas sample introduction system for an inductively coupled plasma mass spectrometer
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United States of America Patent
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May 15, 1990
Grant Date -
N/A
app pub date -
Sep 9, 1988
filing date -
Sep 9, 1988
priority date (Note) -
Expired
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Abstract
A torch device is provided for use in preparing a sample of a gas or vapor for analysis by an analyzer. The torch device is comprised of an elongated cylindrical body with an inductively coupled plasma generating device located at its output or forward section. The torch includes a first tubular element for separately feeding a sample of reactive gas or vapor into a mixing chamber located rearward of said plasma generating means, a second tubular element for separately feeding a nabulizer flow of a plasma gas and including water or solvent vapor or aerosol thereof into the mixing chamber to thereby mix with said sample, and a third tubular element for maintaining a first sheath of plasma gas concentrically about the sample mixture as it enters the plasma generating device for dissociation therein by a plasma flame, including a fourth tubular element for maintaining a second sheath of plasma gas around the first sheath as a coolant prior to introduction of ions formed by dissociation into the analyzer.
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