Fig. 2From: Sebomic identification of sex- and ethnicity-specific variations in residual skin surface components (RSSC) for bio-monitoring or forensic applicationsChromatograms of artificial sebum obtained using HPLC-APCI-MS. Squalene, wax esters, cholesterol and cholesterol ester along with triglycerides were primarily detected in positive ionisation mode (a) of mass spectrometry while fatty acids were detected in negative ionisation mode (b)Back to article page