Characterization of aroma-impact compounds in dry jujubes (Ziziphus jujube Mill.) by aroma extract dilution analysis (AEDA) and gas chromatography-mass spectrometer (GC-MS)

Aroma-impact compounds of dry jujubes obtained from Z. jujuba Mill. cv. tangzao (Y1), Z. jujuba Mill. cv. muzao (Y2), Z. jujuba Mill. cv. lizao (Y3), and Z. jujuba Mill. cv. qingrunhongzao (Y4) were analyzed by gas chromatography-olfactometry (GC-O). The result revealed 35, 29, 34, and 33 aroma-impact volatiles in the Y1, Y2, Y3, and Y4 samples, respectively. The compounds bearing the highest FD factor in each sample were (E)-2-hexenal, (E)-2-heptenal (FD = 256) for Y1, 2,3-butanedione, (E)-2-hexenal, 2,5-dimethylpyrazine, (E)-2-heptenal and -damascenone (FD = 64) for Y2, 2,3-butanedione and -damascenone (FD = 256) for Y3, and 2,5-dimethylpyrazine (FD = 256) for Y4.