276 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS STSRT 8.51 - • 18.91 - 14.49 17.65 28.48 2•- 11 - 28.77 6.•238.45 .•5.5-3 48.45 • 49.8• 0.58 Figure la. Representative chromatogram of a dilute (85 •g ml- l) sebum solution on a packed column. Retention times of major components: palmitic acid, 7.14 stearic acid, 8.51 oleic acid, 10.91 paraffin 1, 14.49 paraffin 2, 17.65 paraffin 3, 20.48 paraffin 4, 23.11 paraffin 5, 25.37 paraffin 6, 27.62 paraffin 7, 29.73 squalene, 34.16 cholesterol, 41.57 not resolved from spermaceti: spermaceti 1, lost in baseline spermaceti 2, 41.57 not resolved from cholesterol: spermaceti 3, 44.00 triglyceride 1, 47.82 triglyceride 2, 49.82 triglyceride 3, 51.73.

1.65 4.89 7.43 .44 ?_9• •' 17.21 F 19.12 11.45 13.78 15.91 17.91 19.79 21•=••'. 93 21.59 7- 24.31 • 26.49 27. •)B 28.69 32.23: 34.3:2 3:5.51 36.62 37.49 18.89 1.58 38.73: 2.78 •0.95 5.3:7 9.44 41 42.89 f4 6'B1 48.2• 9.69 Figure lb. Representative chromatogram of a dilute (85 }xg ml-•) sebum solution on a capillary column. Retention times of major components: palmitic acid, 7.43 stearic acid, 11.98 oleic acid, 12.67 paraffin 1, 14.06 paraffin 2, 16.33 paraffin 3, 18.45 paraffin 4, 20.44 paraffin 5, 22.32 paraffin 6, 24.10 paraffin 7, 28.19 squalene, 25.85 cholesterol, 31.20 spermaceti 1, 27.42 spermaceti 2, 29.58 sper- maceti 3, 34.03 triglyceride 1, 40.07 triglyceride 2, 45.77 triglyceride 3, 54.08.

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