G - Physics – 01 – N
Patent
G - Physics
01
N
358/9
G01N 27/62 (2006.01)
Patent
CA 1045253
ABSTRACT An automated mass spectrometric system which is cap- able of analyzing and identifying a wide variety of chemical compounds. A sample of an unknown compound, in liquid, solid or gaseous state, is introduced into the invented system. It may be a pure sample or a mixture of compounds. In either case, its mass spectrum is searched for selected peaks and an attempt is made to compare the intensity of each mass peak to previously stored, characteristic spectra of one or more compounds in a predetermined family of compounds. If one or more of the compounds in the family of compounds is identified as being present in the sample, its quantity is also deter- mined automatically by the invention. Moreover, a confidence is index is generated as a measure of the likelihood that the compound identified as being present is in fact present. The present invention comprises a sample inlet device, preferably a flash evaporator and separator, a mass spectro- meter, electronic means for controlling the operation of the mass spectrometer and electronic means for analyzing the mass peaks for identification. Based upon the results of data analysis, i.e., comparing of spectra, the analysis means provides signals to the control means to alter the data acqui- sition, in closed loop fashion. System sensitivity and other operating parameters are automatically varied as required to obtain accurate mass peak measurements.
303281
Hertel Robert H.
Mclafferty Fred W.
Villwock Robert D.
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