A method forr ICP-AES determination of 31 trace elements in rocks with PAN enriching was atndied. Theae elements ware precipitated with PAN is a chloride solution of pH 8. The Precipitate was then dissolved in 5% HCI solutioa.The dissolved amounts of iron and aluminium wore so small that they could not cause interference is the determination. In this method the concentrations of Nb, Ta. Hf, Th, Sc, Cr, Ni, Ti, V, Ilsa, Pb, Zn, Sa, Cd, In, La, Ce, Pr,Nd,Sm. Ea. Gd, Tb, py, Ho, Er, Tm, Lu and V were determined simultaneously by ICP-AES method.