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.

Key words: Mongolian oak, wood vinegar, phenols