An apparatus is devised for the evaporation method or preliminary fractional distillation method in spectrographic analysis.As in a similar equipment described by Pszoniski, electric resistance heating is used, and a graphite crucible containing the sample serves as the heating element. Temperature measurements are carried out with a specially designed radiation pyrometer using a photomultiplier tube 931A.Electric current is controlled with the aid of a motor-driven moving iron core reactor.Volatile impurities are evaporated and collected on the top of a graphite or copper rod which is then used as the sample electrode for spectrographic determination.Distillation is carried out in air.