| 초록 |
The application of ionic liquids based extraction methods such as Soxhlet extraction, ultrasonic-assisted extraction and heat-reflux extraction, were investigated for extracting five flavones dihydrokaempferol, quercitrin, amentoflavone, myricetin and 2-hydroxypalmitic acid from Chamaecyparis obtuse leaf and the Soxhlet extraction exhibited higher efficiency. In addition, eleven kinds of 1-alkyl-3-methylimidazolium with different cations and anions were investigated in this work and 1-dodecyl-3-methylimidazolium bromide ([C12MIM]Br) was selected as an additive in methanol in Soxhlet extraction. The Soxhlet extraction parameters including temperature, extraction time and additive–solvent ratio were optimized. Moreover, good linearity, reproducibility, and recovery were observed in the optimization experiments. |
