ブドウ’マスカット・オブ・アレキサンドリア’の顆粒，皮及び果肉から発散する香気物質

Volatile monoterpenes, evolved from the whole berries, skin, and peeled and unpeeled flesh (diced into 2×2×2mm blocks) of Muscat of Alexandria grapes, were measured by the head space method and GC analysis. Four kinds of monoterpene such as linalool and geraniol, known to be the main aromatic substances in Muscat of Alexandria berries, were analyzed. The highest levels of linalool and geraniol, expressed per 100g of samples per 3 hours, were evolved from the skin, followed by the juice, peeled flesh, unpeeled flersh, and whole berries, in descending order. Linalool and geraniol evolved from the skin were found to be at nearly the same level, though the levels of linalool from the juice and flesh were far higher than those of geraniol. The distribution of linalool among the various berry parts was highest in the juice, thoush that of geraniol was highest in the skin. Difference in the strength and quality of the aroma between peeled and unpeeled flesh were discussed. On the other hand, monoterpenes evolved from harvested whole berries increased rapidly for up to 2 days after, then decreased gradually until 7 days after. This change may be caused by the degradation of bound monoterpenes stored in the skin and flesh in excised fruit bunches.