Mongolian oak wood vinegar was purified by static filtration extraction(the ratio of ethyl acetate to wood vinegar liquid is 1∶1)and rotating film evaporation.The compounds were mainly composed of phenols(31.51％),ketones(27.71％),esters(24.77％)and acids(5.91％)by gas chromatogram-mass spectrometry(GC-MS).The compound with the highest GC content was dibutyl phthalate(14.27％),followed by phenol(13.91％),guaiacol(9.40％),(S)-4-ethyl-2-oxazolidinone(7.60％),p-cresol(6.16％)and so on.The total reducing power,OH clearance rate and DPPH clearance rate of aqueous phase,organic phase and wood vinegar were dose-effect relationship with the concentration of the sample solution.In summary,the antioxidant effect of organic phase was the best,followed by wood vinegar stock solution,and the water phase was the weakest.
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