01629naa a2200217 a 450000100080000000500110000800800410001902200140006010000140007424501440008826000090023252008820024165300460112365300330116965300470120265300300124965300250127970000130130470000160131777300780133316341081995-11-06       1995    bl uuuu     u00u1 u    #d  a0021-85611 aWEBER, B.  aStereoisomeric flavor compounds. 72 Stereoisomeric distribution of some chiral sulfur-containing trace components of yellow passion fruits.  c1995  aThe enantiomeric distribution of cis- and trans-2-methyl-4-propyl-1, 3-oxathiane and 3-mercaptohexyl acetate and butanoate in passion fruit extracts were determined by means of multidimensional gas chromatography (MDGC) using sulfur-selective detection. 4S-configured oxathianes and S-configured 3-mercaptohexyl alkanoates of high enantiomeric puritywere detected. 2,2-Dimethyl-4-propyl-1,3-oxathiane and 3-mercaptohexyl propanoate were used as internal standard components, allowing a quantification of the volatiles investigated. The trace components were found in a range from less than 0.5 to 18 ppb. the results are discussedwith regard to the biosynthesis of these volatiles. Due to the high enantiomeric purities detected, the differentiation between naturally o ccurring flavor compounds and synthetic recemates added to passion fruit products is realized conclusively.  aChiral sulfur-containing flavor compounds  aEnantioselective GC analysis  aMultidimensional gas chromatography (MDGC)  aSulfurselective detection  aYellow passion fruit1 aMAAS, B.1 aMOSANDL, A.  tJournal of Agricultural and Food Chemistrygv.43, n.9, p.2438-2441, 1995.