RT Journal Article
SR Electronic
T1 Classification of the Monoterpenoid Composition of Muscat Grapes
JF American Journal of Enology and Viticulture
JO Am J Enol Vitic.
FD American Society for Enology and Viticulture
SP 230
OP 235
DO 10.5344/ajev.1981.32.3.230
VO 32
IS 3
A1 P. J. Williams
A1 C. R. Strauss
A1 B. Wilson
YR 1981
UL http://www.ajevonline.org/content/32/3/230.abstract
AB Muscat of Alexandria grape juice stripped first with pentane and then with Freon F11 is left with residual monoterpene precursor substances. The pentane extract of the juice contains the known free terpenes of the fruit whereas Freon extracts more polar polyhydroxylated monoterpenes (polyols). These latter components are now recognized as free terpenes also. The residual monoterpene precursors in the solvent-stripped juice are derivatized as water-soluble conjugated compounds. Acid hydrolysis of the precursor compounds gives, in addition to most of the known volatile terpenoid aroma substances of the grape, the highly reactive polyols.The experiments confirm the presence of only two forms of muscat grape monoterpenoids, a) the free, and b) the conjugated precursor forms.