Abstract: In this paper di-p-isopropylphenyl sulfoxide (PlPSO) was first synthesized by Friedel-Crafts reaction.The elemental composition and the structural characteristics of this suifoxide were determined by elemental analysis, ¹H NMR, ¹³CNMR, and IR.It's UVspectrum and TLCbehavior were also investigated.It's extraction behavior to more than 40 metallic ions in both HCl and.HNO₃ systems were observed by reversed paper chromatography.It could be used as a stationary phase in the reversed paper chromatography successfully to separate some metal ion couples, such as Au-Pd, Au-Ag, Au-Pt, Au-Tl, Os-Ru, Os-Ir, Zr-Hf, Mo-W and others.