The effect of equilibrium time on the percentage of dye
extracted was studied at 10, 15, 20, 25 and 30 min. Fig. 3 shows
that the percentage of extraction increased significantly at
the initial stage (93.65%). The extraction efficiency of dye
increased with increase in equilibration time. The whole
dye was transported to the organic phase after 25 min (100%
dye extracted), and hence an equilibrium period of 25 min. is
recommended.