The most important problems of analytical atomic spectrometry are introduction of the sample into the atomizer and atomization of the sample. To solve these problems gas-phase atomization is suggested. This consists of preliminary isolation of the elements to be determined in the form of gaseous (volatile) compounds with subsequent gas-chromatographic separation. Separated compounds are fed into the atomizer individually in a stream of inert gas. This technique is the basis of development of dispersionless modes of atomic emission, atomic fluorescence and atomic absorption multielement analysis using non-selective detection.