The optimum conditions are studied for determination of trace amount of 14 elements ( V, Mo, W, P, Li, Bi, Cd, Pb, U, Zn, Cu, Co, Ni, Mn) in geological samples based on group separation with 732 cation exchange resins. The eluants HC104-H2O2, HBr, H2SO4-H2O, HCl and(NH4)2C2O4 are selected for different group. Lower detection limits are obtained by this procedure.