Two different methods of sample introduction into an ICP source have been applied to solve special problems of metal analysis. First, an electrolytical cell was used to dissolve the metallic compounds of metals only. The resulting analyte solution is flow-injected directly into the ICP. Secondly, the solid sampling by a graphite crucible heated up temperature-controlled and coupled directly to the ICP torch system was modified to determine 9 trace elements contained in 24 available certified reference samples.