Sampling and analysis of airborne particulate matter by glow discharge atomic emission and mass spectrometries
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United States of America Patent
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Jun 15, 2004
Grant Date -
Jan 10, 2002
app pub date -
Aug 21, 2001
filing date -
Feb 25, 1999
priority date (Note) -
Expired
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Abstract
The apparatus and methods employ momentum separation to implement a particle beam (PB) sampling scheme for the introduction of particulate matter into low pressure (e.g., glow discharge) plasma sources for subsequent atomic emission and mass spectrometry chemical analysis in real time, whether the particles are provided in a continuous stream during the analysis or are collected in situ and analyzed periodically upon obtaining a suitable number of particles to be analyzed. The particulate matter in the particle beam (PB) is subjected to low-power laser scattering to effect particle size analysis. Gases removed by momentum separation are also analyzed.
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