Description: In this paper deals questions analysis trace-element composition of human serum. Determined of methodological approaches for obtaining adequate results. Shown the prospects of using modern instrumental methods of analysis. Discussed features of the use of reference samples for interlaboratory tests the quality of research. Attention is given to ensure the reliability of element analysis in carrying out biological monitoring.
Keywords: macro- and microelements, standard samples of biological materials, referents value, interlaboratory investigation quality control