Distribution ratio DC (ethyl acetate / water extraction) at pH 4 for 2,4- dichlorophenoxyacetic acid (2, 4 D) is 42.3. Calculate the fraction remained in water (fphase1.1) then deduce fraction extracted (fphase 2.1) to obtain the analyte recovery (percentage of analyte in the extractant) after 1 extraction of 100 mL water sample having pH 4 with 75 mL of ethyl acetate. OfPhase1,1 -0.0306; fphase2,1 = 0.9694; and Analyte recovery = 96.94% fphase1,1 -0.2500; fphase2,1 = 0.7500; and Analyte recovery = 25.00% fphase1.1 -0.2500; fphase2,1 = 0.7500; and Analyte recovery = 75.00% fphase1.1 -0.0306; fphase2,1 = 0.9694; and Analyte recovery = 3.06%