Analysis of the elemental composition in blood serum and hair of adolescents of different ethnic groups in Khabarovsk krai in connection with nutrition and technogenic contamination of territories

An ecological and biological examination of adolescents of the following ethnic groups of Khabarovsk Krai was conducted: Nivkhs ( n = 25), Evens ( n = 54) and newly arrived Russians ( n = 23), whose average age amounted to 14.57 ± 0.24, 14.6 ± 0.2 and 15.00 ± 0.32, respectively. Fe, Cu, Mo, Zn, Co, Se, Th, U content in samples of blood serum and hair was determined by atomic emission spectroscopy with inductively-coupled plasma. The elemental analysis of the diet was performed by means of questionnaires, and with the help of «Correct Food 6.5» software based on the reference book «Chemical composition of foods» (edited by Academician of the Academy of Medical Sciences A.A. Pokrovsky). Analysis of biosubstrates revealed elemental imbalance in all ethnic groups. The high concentrations of Th and U in the blood serum and hair of adolescents was an additional factor of inversion of elemental homeostasis.