A polarographic method for continuous determination of copper, lead, nickel and cobalt in geochemical samples is reported. Copper gives a sensitive peak in a solution containing HCl, KCNS, NH2. CH2. COOH and ascorbic acid; in the same solution lead can be determined by adding potassium iodide; nickel and cobalt are determined by adding NH4OH, NH4Cl, sulfosalicylic acid and dime- thyglyoxime. The detection limits are 0.02ug/ml for Cu, Pb; 0.01ug/ml for Ni, Co.