7. Peaks with retention times of 137.3, 142.9, 155.8, 178.0, 214.8, and 223.5 s were found on the chromatogram. Using the table, perform a qualitative identification of the mixture. The retention times of hexane, heptane, octane, and nonane are 110.5, 145.4, 202.0, and 241.7 s, respectively. Table:
toluene pyridine butanol propyl acetate xylene methyl hexane butyl acetate xylene tetrahydrofuran iso-butane isopentanol o-xylene 3-methyl hexane
RESPECTIVELY VALUES
720.8 742.5 621.4 681.8 855.2 693.5 761.1 833.2 705.3 612.2 733.5 778.9 856.9 679.0

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