Key Words: Resolution by crystallization of diastereoisomeric salts/Perfluoropropylene oxide 1 Trifluoropyruvate/Capillary GC determination of ratios of enantiomers 1 Cyclodextrine- derived GC columns 1 Determination of the sense of chirality by chemical correlation p& of 3, 3, 3-tritluoro-2-hydroxypropanoic and 4, 4, 4-trifluoro-3-hydroxybutanoic acid