THE IDENTIFICATION OF SOME VOLATILE CONSTITUENTS OF CONCORD GRAPE JUICE ^a

Some Volatile Aroma Constituents of Vitis Vinifera Var. Muscat of Alexandria

“…Ethanol, therefore, must be accepted as the most plentiful component of the volatile essence of the Muscat of Alexandria grape. This finding is in general agreement with other published research on fruit volatile essences (3, 4,8,9,11,15,24).…”

“…In general the volatile aroma substances identified may be divided into two groups : those lower boiling, simpler, organic compounds which seem to be common to all fruit aroma distillates, and higher boiling compounds which may be characteristic of the particular species or variety. Thus, the higher boiling ester, methyl anthranilate, seems to be a characteristic essence component of the labrusca species (20) although the complete volatile essence of the Concord variety has recently been shown to contain a number of the simpler lower boiling substances and some additional higher boiling components as well (11). The volatile essence from mixed varieties of Vitb rotundifolia similarly has been found to contain 2-phenylethanol in addition to a number of the lower boiling organic substances (15).…”

Volatiles from Grapes I. Some Volatiles from Concord Essence

“…It has long been recognized, however, that other constituents are necessary to reproduce the natural flavor of Concord grape juice. Holley et al (1955) recognized this, and, using classical methods, identified ethanol, methanol, ethyl acetate, methyl acetate, acetone, acetaldehyde, methyl anthranilate, and acetic acid from Concord grape juice. To elucidate the chemical malreup of Concord essence further, we investigated the low-boiling constituents.…”

Volatiles from grapes. Identification of volatiles from Concord essence

“…The present communication is an extension of previous work on Concord grape volatiles in which 16 constituents were identified (Stevens et al, 1965). These components along with those identified by Holley et al (1955) are summarized in Table I. Also included are compounds tentatively identified by Neudoerffer et al (1965), using relative retention times.…”