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Updated: Oct 28, 2025

Procedures of Laboratory Fumigation for Pest Control with Nitric Oxide Gas
Published on: November 24, 2017
[Risk assessment for public health associated with nitrate content in crop products]
O G Bogdanova1, N V Efimova1, E E Bagaeva2
1East-Siberian Institute of Medical and Ecological Research, 665827, Angarsk, Russian Federation.
Abstract:
The increasing need of the population for crop products (СP) makes continuous monitoring of nitrate content an increasingly urgent task. The accumulation of multidirectional data on the effect of nitrates on the state of the body requires further studies to assess the alimentary risk caused by their admission to the population of various regions. The aim of the work was to study the levels of nitrate contamination of CP and assess the associated risk to the health of children and adults in the Baikal Region. Material and methods. The characteristics of СP contamination with nitrates were given according to the results of socio-hygienic monitoring for 2015-2019. The exposure to nitrates was estimated according to the data of their chronic daily intake with RP. Reference exposure levels were used to calculate hazard quotients for different age groups of the population. Results. The average number of annual studies in the Republic of Buryatia was 1000.6 [95% confidence interval (CI) 887.4-1113.8], the proportion of СP with nitrate content in concentrations above the permissible level was observed on average with a frequency of 4.51% (95% CI 4.11-4.91), which was 3.6 fold higher than the Russian average for 2019 - 1.26%. The alimentary effect of nitrates on the adult population of the Republic of Buryatia, due to admission from СP, was estimated as permissible at the level of the average centile trend, and as unfavorable at the level of the 90th centile. In children, nitrate exposure lead to an unacceptable risk at the level of the average centile tendency of the content of the contaminant in СP, which exceeded 1.0. A comparative analysis of СP safety indicators revealed the priority of nitrate pollution in a number of areas of the Republic of Buryatia. The high levels of СP nitrate contamination are primarily caused by the entrance of local products to the consumer market of the Republic of Buryatia. Conclusion. Taken together, the current situation poses a certain health risk and necessitates further in-depth study of the causes and factors of nitrate contamination. To reduce health risk assessment uncertainties, it is necessary to update data on СP consumption levels among different population groups, including preschool and infant children.
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