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Vol. 22 (2019 year), No. 3, DOI: 10.21443/1560-9278-2019-22-3
Chimitdorzhieva G. D., Zhamsaranova S. D., Bazhenova B. A.
The fractionation of 13С in the Тransbaikalia ecosystem
The analysis of isotopes of the main biogenic elements is carried out in determining the geographical origin of the sources of raw materials used for the manufacture of food products, as well as the authenticity of its origin (natural or obtained as a result of biotechnological synthesis). The experimental studies of the 13C isotope fractionation in the "soil – pasture vegetation – cattle meat" chain have been carried out using available data on pasture vegetation of Mukhorshibir, Ivolginsky, Eravninsky districts and soils of Mukhorshibir and Eravninsky districts of Transbaikalia. Also, the objects of research were samples of raw meat (taken in the trading network) from eight different regions of Transbaikalia: Kabansky, Bichursky, Dzhidinsky, Zakamensky, Kizhinginsky, Khorinsky, Zaigraevsky, Aginsky. The content of stable isotopes in samples has been determined in Joint Usage Center "Instrumental methods in ecology", A. N. Severtsov Institute of Ecology and Evolution of the Russian Academy of Sciences (IEE RAS) (Moscow) using the Finnigan Delta V Plus mass spectrometer. The results of the studies have shown the relationship of the isotopic composition of carbon in the muscle tissue of meat from different regions of Transbaikalia with that in plants growing in the region and serving as fodder for cattle, which indicates the presence of an "isotopic signature" on the trophic chain: plants – soil – herbivorous animals. The isotopic composition of meat raw materials in Transbaikalia has been studied for the first time. The data obtained indicate that the samples of meat from the region's trading network are products of local origin and can be classified as natural raw materials. The isotopic composition of raw meat, soil and pasture vegetation from the Transbaikalia region can be used as data that will identify the geographical origin and help in assessing the recognition of a counterfeit product issued for raw materials of local origin.
(in Russian, стр.8, fig. 4, tables. 1, ref 14, AdobePDF, AdobePDF 0 Kb)