[en] Impregnation of tri-n-octylamine (TOA) into Siplite LX-16 resin, by two commonly used methods namely; wet and dry impregnation method, was studied and applied for uranium extraction from sulfate medium. The resin beads were characterized using FT-IR and FE-SEM analysis. The influence of different parameters such as effect of TOA concentration, pH, aqueous sample and eluant flow rates were investigated. Maximum sorption of U(VI) was obtained using 30% TOA/Siplite LX-16 prepared by the dry method at a pH range of 1.4-1.6. Flow rate of 1.0 mL/min for the pregnant sample was favorable for quantitative sorption of uranium during the extraction step while the flow rate of 0.5 mL/min for eluant solution was effective for the elution step. (author)