Analysis of monohydrocarbon components in the feedstock for reformed refined oil and simulation issues

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I am conducting research on the differences between the designed physical properties of feed materials and reaction products in reforming units and their actual operational properties. After sampling the pre-hydrogenated refined oil, it is sent to testing laboratories for analysis; these laboratories use gas chromatography-mass spectrometry. The results provided consist only of the individual hydrocarbon components along with the percentage of peak area for each component, and there are many peaks in total. Since there are no such comprehensive standard samples, it is not possible to determine the quality fraction, and it is thus impossible to use software to simulate the properties of fluids. Dear experts, is there any testing method that can determine the quality fraction? If it can’t be done, how do design firms usually simulate this?