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. 2012 Sep 5;13(9):11027–11043. doi: 10.3390/ijms130911027

Figure 2.

Figure 2

Effect of soaking time (a) solid–liquid ratio; (b) ultrasound power; (c) and ultrasound time; (d) on the extraction efficiency of target compounds with 1.0 M [C8mim]Br. The extraction efficiency is expressed as the observed values of target compounds and the maximum amount in each curve was taken to be 100%.