Figure 5.

Results of iGC analyses on the surface energetics of hair in the virgin state, after bleaching, as well as after bleaching and subsequent treatment with different conditioner formulations. (a) Dispersive surface energy values obtained from a series of pulsed injections of n-alkanes, using the peak center of mass for evaluation according to the model of Dorris and Gray. (b) Chromatograms showing the elution of n-octane from columns filled with virgin (black) and bleached (gray) hair. The arrow highlights strong peak tailing in the case of the native hair. (c) Trends in dispersive surface energy after correction for peak tailing (f_T) and different probe residence times (as given by the retention factor k).