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Vol. 25 No. 7 (2013): Vol 25 Issue 7

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Influences of Drying on the Volatile Compounds in Chinese Jujube

https://doi.org/10.14233/ajchem.2013.13757
Yuan Lu
Research Center of Chinese Jujube, Agricultural University of Hebei, Baoding, P.R. China
Zhi-Hui Zhao
Research Center of Chinese Jujube, Agricultural University of Hebei, Baoding, P.R. China
Meng-Jun Liu
Research Center of Chinese Jujube, Agricultural University of Hebei, Baoding, P.R. China

Corresponding Author(s) : Meng-Jun Liu

lmj1234567@yahoo.com.cn

Asian Journal of Chemistry, Vol. 25 No. 7 (2013): Vol 25 Issue 7

Abstract

The effects of different drying methods on the volatile compounds of Chinese jujube (Ziziphus jujuba Mill.), an important fruit and traditional herbal medicine in China, were first studied. The mature fruits were dried using different drying methods: oven-drying at 50, 60, 70 ºC and air-drying at ambient temperature. The volatile compounds from fresh and dried fruits were isolated by simultaneous distillation extraction and analyzed by gas chromatography-mass spectrometry. The major components in fresh Chinese jujube were (Z)-11-hexadecenoic acid (26.5 %), (Z)-7-tetradecenoic acid (24.25 %), ethyl 9-hexadecenoate (16.98 %) and dodecanoic acid (12.51 %). In the three oven-dried samples at 50, 60, 70 ºC, the major components were the same: (Z)-11-hexadecenoic acid (34.2, 40.59, 43.22 %), (Z)-7-tetradecenoic acid (28.82, 29.6, 28.16 %) and dodecanoic acid (13.56, 14.3, 10.67 %). In air-dried sample, the main constituents were: (Z)-11-hexadecenoic acid (51.16 %), myristoleic acid (26.07 %) and dodecanoic acid (12.52 %). The aroma compounds naphthalene,1,2,3,5,6,8a-hexahydro-4,7-dimethyl-1-(1- methylethyl)-, (1S-cis)- and 2-naphthalenemethanol, decahydro-a,a,4a-trimethyl-8-methylene-, [2R-(2.a.,4a.a.,8a.b) were first discovered in Chinese jujube. The volatile compounds of fresh and differently dried samples showed distinct qualitative and quantitative differences. The results showed that oven-drying at 60 ºC is the more suitable method for drying of Chinese jujube in terms of volatile compounds.

Keywords

Drying method Volatile compounds Ziziphus jujuba Mill
Lu, Y., Zhao, Z.-H., & Liu, M.-J. (2013). Influences of Drying on the Volatile Compounds in Chinese Jujube. Asian Journal of Chemistry, 25(7), 3765–3768. https://doi.org/10.14233/ajchem.2013.13757
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