Kashima Yusei, Miyazawa Mitsuo
Department of Applied Chemistry, Faculty of Science and Engineering, Kinki University, 3-4-1 Kowakae, Higashiosaka-shi, Osaka 577-8502, Japan, (phone: +81-6-6721-2332; fax: +81-6-6727-2024).
Chem Biodivers. 2014 Mar;11(3):396-407. doi: 10.1002/cbdv.201300234.
The aim of this study was to investigate the chemical composition and the odor-active compounds of the essential oils from Evolvulus alsinoides, which is a well-known edible and medicinal plant. The volatile compounds in the oils were identified by hydrodistillation (HD) and solvent-assisted flavor evaporation (SAFE) in combination with GC, GC/MS, GC/O (=olfactometry), aroma extract dilution analysis (AEDA), and relative flavor activities (RFA values). The most abundant compound in the HD oil was cis-α-necrodol (12.62%), an irregular monoterpene with a cyclopentane skeleton, which is very unusual in the plant kingdom. In the SAFE oil, the main components included 2-butoxyethanol (9.01%), benzyl alcohol (8.01%), and γ-butyrolactone (7.37%). Through sensory analysis, 21 aroma-active compounds were identified by GC/O. The most intense aroma-active compounds in the HD oil were hexan-1-ol and γ-nonalactone, both of which showed high RFA values. α-Methyl-γ-butyrolactone and dimethyl sulfone contributed more strongly to the aroma of the SAFE oil. These results imply that the essential oils of E. alsinoides deserve further investigation in the food industry.
本研究旨在探究蓝星花（一种著名的可食用和药用植物）精油的化学成分及气味活性化合物。采用水蒸馏（HD）和溶剂辅助风味蒸发（SAFE）结合气相色谱（GC）、气相色谱/质谱联用（GC/MS）、气相色谱 - 嗅觉测量法（GC/O）、香气提取物稀释分析（AEDA）以及相对风味活性（RFA值）来鉴定精油中的挥发性化合物。水蒸馏精油中含量最丰富的化合物是顺式 - α - 新克罗醇（12.62%），它是一种具有环戊烷骨架的不规则单萜，在植物界中非常罕见。在溶剂辅助风味蒸发精油中，主要成分包括2 - 丁氧基乙醇（9.01%）、苯甲醇（8.01%）和γ - 丁内酯（7.37%）。通过感官分析，利用气相色谱 - 嗅觉测量法鉴定出21种香气活性化合物。水蒸馏精油中香气强度最高的化合物是己醇和γ - 壬内酯，二者均表现出较高的RFA值。α - 甲基 - γ - 丁内酯和二甲基砜对溶剂辅助风味蒸发精油的香气贡献更为显著。这些结果表明，蓝星花精油在食品工业中值得进一步研究。
