Gas chromatography/matrix-isolation apparatus
- 411 Francis St., Bourbonnais, IL 60914
A gas-sample collection device provides matrix isolation of individual gas bands from a gas chromatographic separation and for the spectroscopic analysis of the individual sample bands. The device includes a vacuum chamber containing a rotatably supported, specular carousel having at least one reflecting surface for holding a sample deposited thereon. A gas inlet is provided for depositing a mixture of sample and matrix material on the reflecting surface which is maintained at a sufficiently low temperature to cause solidification. A first parabolic mirror directs an incident beam of electromagnetic radiation, such as in the infrared (IR) spectrum, from a source onto the sample/matrix mixture while a second parabolic mirror directs a second beam of electromagnetic radiation reflected by the specular surface to an IR spectrometer for determining the absorption spectra of the sample material deposited on the reflecting surface. The pair of off-axis parabolic mirrors having a common focal point are positioned outside of the vacuum chamber and may be displaced in combination for improved beam positioning and alignment. The carousel is provided with an aperture for each reflecting surface to facilitate accurate positioning of the incident beam relative to the gas-samples under analysis. Improved gas-sample deposition is insured by the use of a long focal length stereomicroscope positioned outside of the vacuum chamber for monitoring sample formation through a window, while the sample collector is positioned outside of the zone bounded by the incident and reflected electromagnetic beams for improved sample access and monitoring.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- DOE Contract Number:
- W-31109-ENG-38
- Assignee:
- Reedy, Gerald T. (411 Francis St., Bourbonnais, IL 60914)
- Patent Number(s):
- US 4594226
- OSTI ID:
- 865876
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
chromatography
matrix-isolation
apparatus
gas-sample
collection
device
provides
matrix
isolation
individual
bands
chromatographic
separation
spectroscopic
analysis
sample
vacuum
chamber
containing
rotatably
supported
specular
carousel
reflecting
surface
holding
deposited
thereon
inlet
provided
depositing
mixture
material
maintained
sufficiently
temperature
solidification
parabolic
mirror
directs
incident
beam
electromagnetic
radiation
infrared
spectrum
source
reflected
spectrometer
determining
absorption
spectra
pair
off-axis
mirrors
common
focal
positioned
outside
displaced
combination
improved
positioning
alignment
aperture
facilitate
accurate
relative
gas-samples
deposition
insured
length
stereomicroscope
monitoring
formation
window
collector
zone
bounded
beams
access
beam position
material deposited
common focal
sample collector
rotatably supported
beam relative
individual gas
device provides
collection device
focal length
spectroscopic analysis
gas chromatography
sample collection
matrix material
gas inlet
vacuum chamber
electromagnetic radiation
reflecting surface
chamber containing
deposited thereon
gas chromatograph
incident beam
positioned outside
chromatographic separation
absorption spectra
sample material
radiation reflected
gas chromatographic
improved gas
matrix isolation
sample deposited
gas-sample collection
specular surface
gas bands
individual sample
improved sample
monitoring sample
sample band
accurate position
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