H - Electricity – 01 – J
Patent
H - Electricity
01
J
358/9
H01J 47/00 (2006.01) G06F 17/00 (2006.01) H01J 49/02 (2006.01) H01J 49/04 (2006.01)
Patent
CA 1042118
ABSTRACT OF THE INVENTION An automated mass spectrometric system which is capable of analyzing and identifying a wide variety of chemical com- pounds. 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 match such peaks to previously stored, characteristic spectra of one or more compounds in a prede- termined family of compounds. Matching is on a probabilistic basis, reflecting the occurance probabilities or uniqueness of the mass peaks found, and the accuracy with which the relative peak intensity pattern matches that of any of the compounds in the family of compounds sought. 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 index is generated as a measure of the likelihood that the compound identified as being present is in fact present. Based upon the results of data analysis, i.e., matching of spectra, analysis means provides signals to the control means to alter the data acquisition, in closed loop fashion. System sensitivity and other operating parameters are auto- matically varied as required to obtain accurate mass peak measurements.
225420
Hertel Robert H.
Mclafferty Fred W.
Villwock Robert D.
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