Flavor of Black Tea

Part II. Alcohols and Carbonyl Compounds

抄録

The neutral fraction of the essential oils from three kinds of black tea (same samples as described in the previous paper, ¹⁾ i.e., Assam, Shan and Benihomare) was separated into carbonyl and carbonyl-free fractions and analysed by gas chromatography. On the basis of relative retentions and aroma of effluents with the references of the chromato-graphic data obtained by the previous works, ^2_??_4) the major alcohols were found to be cis-2-pentenol, n-hexanol, cis-3-hexen-l-ol, three isomers of linalooloxide, linalool, nerol, geraniol, benzylalcohol, and phenylethylalcohol. In the carbonyl fraction, phenylacetaldehyde was newly identified, and besides it, the presence of iso-and n-butyr-, iso-and n-valer-aldehyde, methylethylketone, trans-2-hexenal, benzaldehyde were recognized. There were no differences in the components among three kinds of black tea, but the relative quantity of each component in the essential oil was different among three varieties.