Volatile constituents of the solvent extracts of Welsh onions (Allium fistulosum L. variety Maichuon) and scallions (A. fistulosum L. variety caespitosum)

Kuo, M.C.; Ho, C.T.

Journal of Agricultural and Food Chemistry 40(10): 1906-1910

1992


ISSN/ISBN: 0021-8561
DOI: 10.1021/jf00022a036
Accession: 002544923

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Abstract
Volatile components were isolated from Welsh onions and scallions by solvent extraction at ambient temp. and analysed by GC and GC-MS. Results are tabulated. Sixty-seven volatile components were identified, including 12 novel polysulphides. Methyl methanethiosulphinate and 10 dialk(en)yl thiosulphonates were among those volatiles in Welsh onion and scallion extracts. These thiosulphinates and thiosulphonates were not previously identified in their distilled oils, probably due to their instability to heat.