Registers – Transfer mechanism – Traveling pawl
Patent
1975-08-04
1977-02-15
Smith, Jerry
Registers
Transfer mechanism
Traveling pawl
250281, G06F 1552, G06G 774
Patent
active
040083888
ABSTRACT:
An automated mass spectrometric system which is capable 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 match such peaks to previously stored, characteristic spectra of one or more compounds in a predetermined family of compounds. Matching is on a probabilistic basis, reflecting the occurrence 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 determined 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.
The present invention comprises a sample inlet device, preferably a flash evaporator and separator, a mass spectrometer, 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., matching of spectra, the analysis means provides signals to the control means to alter the data acquisition, in closed loop fashion. System sensitivity and other operating parameters are automatically varied as required to obtain accurate mass peak measurements.
REFERENCES:
patent: 3012139 (1961-12-01), Hanson et al.
patent: 3154747 (1964-10-01), Kendall
patent: 3493742 (1970-02-01), Martignoni et al.
patent: 3624420 (1971-11-01), Krutz et al.
patent: 3639741 (1972-02-01), Carrick
patent: 3723713 (1973-03-01), Banner et al.
Hertel Robert H.
McLafferty Fred W.
Villwock Robert D.
Smith Jerry
Universal Monitor Corporation
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