Indentification of chemicals in a sample using gc/saw and raman spectroscopy

Abstract

A method for identification of chemicals in a sample using a gas chromatograph, a surface acoustic wave (SAW) sensor coupled with the gas chromatograph to define a gas chromatography (GC)/SAW system, and a Raman spectrometer. The method includes receiving SAW frequency response data generated by the SAW sensor, receiving Raman spectrum data generated by the Raman spectrometer, producing a Raman spectrum corresponding to an eluted component of interest based upon an integration of the Raman spectrum data, identifying a set of one or more candidate chemicals for the eluted component of interest based on a corresponding peak of the SAW frequency response data, and searching a Raman database for a match between the produced Raman spectrum and a chemical in the Raman database from among the set of candidate chemicals for the eluted component of interest.

1 . A method for identification of chemicals in a sample, the method comprising:
 receiving surface acoustic wave frequency response data generated by a surface acoustic wave sensor of a gas chromatography/surface acoustic wave system, the surface acoustic wave frequency response data including one or more peaks corresponding respectively to one or more eluted components separated from a sample by a gas chromatograph of the gas chromatography/surface acoustic wave system;   receiving Raman spectrum data generated by a Raman spectrometer for the one or more eluted components;   producing a Raman spectrum corresponding to an eluted component of interest from among the one or more eluted components based upon an integration of the Raman spectrum data;   identifying a set of one or more candidate chemicals for the eluted component of interest based on the corresponding peak of the surface acoustic wave frequency response data; and   searching a Raman database for a match between the produced Raman spectrum and a chemical in the Raman database from among the set of candidate chemicals for the eluted component of interest.   
     
     
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