The isotopic composition of hair among the population in the Vologda Region depending on the conditions of living and nutrition

Isotope mass spectrometry methods are used to study changes in the isotopic composition of organisms in the food chain called trophic fractionation. In particular, with the help of isotope analysis of tissues, it is possible to determine the type of nutrition and possible place of residence of a person, which helps in solving the tasks of forensic examination. In this study, the isotopic composition C and ⁵N in the hair of residents of the industrial city of Cherepovets and the Kirillovsky District of the Vologda Region, remote from industrial sources of pollution, was determined. The determination of the isotopic composition of hair was carried out on an isotope mass spectrometer Thermo-Finnigan Delta V Plus in the Ecological and Analytical Laboratory of Cherepovets State University. The average values of isotopes in the hair of the study participants are -20,86 (C) and 9,98 (⁵N). There are differences in the ratio of carbon and nitrogen isotopes in the hair of residents of Cherepovets and Kirillovsky District. There are not statistically significant differences in the isotopic composition of C and ⁵N in the hair of female and male. There are differences of ⁵N in the hair of people who consume different amounts of fish (people who consume fish more often have a higher ratio of ⁵N).