Abstract: A method and system for rapid determination of a composition, such as crude oils and fractions thereof, and s obtaining the information necessary to assess the yield of commercially valuable fuel and lube oil fractions in a single process, variations of the method and system use Gas Chromatography—FID/Mass Spectrometry and other features, including an auto sampler, a wall coated capillary column, a temperature programmable injector, and a data processing system for compiling and processing the experimental data. The system and method further include a computer system with application software or other processing mechanism and optionally a communication network. One variation provides a graphical user interface for the entry of data and for displaying information, such as in a graphical manner, to show the relationship of various determined outputs and results.

Abstract: Systems and methods for correlating and displaying the data produced by GC and MS. The data are correlated by representing MS data in the time domain, and GC and MS data are simultaneously displayed. When a particular mass spectrum is extracted, a search engine searches libraries for components with matching mass spectra. Further features provide for manipulation of the display, extraction of ion signals, subtraction of spectra from the display, removal of ions from the display, performing ion interference analysis, filtering the displayed data based on various criteria, transferring MS data to an active parameter data file, and transferring MS data to libraries.