Detection system for a gas chromatograph

Details Detection system for a gas chromatograph Detection system for a gas chromatograph

1982-04-26

1984-02-21

Kreitman, Stephen A.

Measuring and testing

Gas analysis

Gas chromatography

2504581, 2504591, G01N 3108

Patent

active

044322259

ABSTRACT:
A method and apparatus are described for the quantitative analysis of vaporizable compounds, and in particular of polycyclic aromatic hydrocarbons which may be induced to fluoresce. The sample to be analyzed is injected into a gas chromatography column and is eluted through a narrow orifice into a vacuum chamber. The free expansion of the eluted sample into the vacuum chamber creates a supersonic molecular beam in which the sample molecules are cooled to the extent that the excited vibrational and rotational levels are substantially depopulated. The cooled molecules, when induced to fluoresce by laser excitation, give greatly simplified spectra suitable for analytical purposes. The laser induced fluorimetry provides great selectivity, and the gas chromatograph provides quantitative transfer of the sample to the molecular beam.

REFERENCES:
patent: 4100412 (1978-07-01), Hausdorff
patent: 4350661 (1982-09-01), Davis et al.

Affiliated with

Also associated with

Rating

Detection system for a gas chromatograph does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Detection system for a gas chromatograph, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Detection system for a gas chromatograph will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1029992