柞树木醋液酚类物质的组分分析

CONSTITUENT ANALYSIS OF PHENOLS IN WOOD VINEGAR FROM MONGOLIAN OAK (QUERCUS MONGOLICA)

摘要: 采用常规方法测定了柞树木醋液的基本参数,所得木醋液为黑褐色且带有烟焦味,pH值4.06,有机酸含量(以醋酸计)5.20%,密度(20℃)1.0260 g/cm3,木炭粉吸附法精制得率90.7%.采用分配法将柞树木醋液系统地划分为酸性物、酚类物和中性物,并利用GC-MS联用仪对酚类物进行了组分分析.结果表明,酚类物中的主要组分是苯酚3.60%、2-甲基苯酚1.20%、1,2,3-三甲氧基苯12.82%、2,6-二甲氧基苯酚34.41%和4,6-二(1,1-二甲基乙基)-2-甲基-苯酚35.97%.该分析对柞树木醋液产品品质基准的制订具有重要意义.

Abstract: Basic parameters of wood vinegar from Mongolian oak (Quercus mongolica Fisch.ex Turcz) were measured with routine analysis. The results showed that pH value, organic acid content (calculated as HOAc), density and refined yield were 4.06, 5.20%, 1.026 0 g/cm3 (20℃) and 90.7%, respectively. Then the wood vinegar was systematically fractionated into acidic substance, phenols and neutrals by batch extraction. With GC-MS, phenols of wood vinegar were analyzed. The results showed that main constituents in the phenols were phenol 3.60%, 2-methyl phenol 1.20%, 1,2,3-trimethoxy benzene 12.82%, 2,6-dimethoxy-phenol 34.41% and 4,6-di(1,1-dimethyle-thyl)-2-methyl-phenol 35.97%. This analysis is of important significance to standardize the product quality of Mongolian oak wood vinegar.