Effect of Different Extraction Agents on Enrichment of ActiveComponents from Wood Vinegar

The enrichment effect of different extraction agents on active components of wood vinegar from waste fir plate was studied. The results showed that different extraction agents exhibited different effects on the enrichment of active components in wood vinegar. Ethyl acetate, chloroform and ether exhibited good enrichment effect on phenolic substances, which ether present better extraction performance; ethyl acetate and chloroform had good enrichment effect on ketones; 3 extractants had no obviously enrichment effect on esters, aldehydes and alcohols, and they were not conducive to the enrichment of acid substances. Methanol addition was contributed to increase the enrichment effect of ether on phenolic substances. When the volume ratio of ether to methanol was 2:1, GC content of phenolic compounds reached to 66%, which was 1.96 times that of un-treated wood vinegar.