IDENTIFICATION OF PASSION-FRUIT GLYCOSIDES BY GAS-CHROMATOGRAPHY MASS-SPECTROMETRY

beta-D-Glucopyranosides, alpha-L-rhamnopyranosyl beta-D-glucopyranosid es, and an alpha-L-arabinofuranosyl beta-D-glucopyranoside have been i dentified in four passion fruit species by GC/MS analysis of trifluoro acetylated (TFA) derivatives obtained from glycosidally bound volatile compounds, using NCI and/or EI ionization modes, analysis of the part ially methylated alditol acetates obtained after hydrolysis of the gly cosidic fraction, and comparison of the retention times of their TFA d erivatives with those of synthetic standards. These compounds are quan titatively and qualitatively more important in Passiflora edulis and P assiflora edulis f flavicarpa than in Passiflora ligularis and Passifl ora molissima. Only (S)-linalool is present in bound form in P. edulis . (6R,7E,9S)-3-Oxo-alpha-ionol and 4-oxo-beta-ionol glucosides have be en identified in P. edulis and P. edulis f flavicarpa, and vomifoliol 1A and 2A glucosides seem characteristic of the first species.