Chromatographic collection apparatus and method for sequential c

Details Chromatographic collection apparatus and method for sequential c Chromatographic collection apparatus and method for sequential c

1990-04-30

1992-03-10

Williams, Hezron E.

Measuring and testing

Gas analysis

Gas chromatography

73 2342, 7386481, G01N 3072

Patent

active

050940996

ABSTRACT:
An apparatus and method are provided for conducting sequential condensed and vapor phase spectroscopic studies. The apparatus includes a vacuum manifold including a series of interconnected conduits forming a sealed chamber for containing a sample undergoing analysis. The vacuum manifold includes a collection/deposition station and a spectroscopy/revaporization station connected together by a transfer conduit. Ports in the vacuum manifold at the collection/deposition station connect the chamber to a vacuum pumping system and a chromatograph separates a sample to be tested into individual chemical compounds. A collection tube with a mechanism providing transport between stations is contained within the vacuum manifold. At the collection/deposition station, a separated compound from the chromatograph is deposited on a deposition surface of a collection tube. The tube is then shuttled for spectro analysis at the spectroscopy/revaporization station where ports allow the deposited sample to be subjected to a beam of electromagnetic radiation from an appropriate source. Detectors positioned at the ports both in and out of the plane of the incident beam allow analysis. After condensed phase study, a revaporization/collection mechanism allows the sample to be revaporized from the deposition surface of the collection tube and recovered for further vapor phase analysis.

REFERENCES:
patent: 4641541 (1987-02-01), Sharp

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