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In the article, the analysis of the main problems of Metrological accounting of the world oil and gas industry, the quantity and quality of oil products, the main working wind of the Uzbekneftgaz network of the Mubarak oil and gas production department, the composition of the waters driving into the layer in oil production, the methodology for measuring the mass of nitrates in, requirements for measurement error, equipment pour safety requirements, methods for eliminating nnterferential effects, preparation of solutions necessary for analysis, preparation of a ferrotic salt solution with a mass fraction of 30%, preparation of a silver sulfate solution, preparation of an aluminum hydroxide suspension for coagulation, preparation of a sodium salicylate solution with a mass fraction of 0.5%, construction of a calibration graph, standards for monitoring the accuracy of, to control the accuracy of the measurement results, the results of the analysis obtained from the photometric measurement of the stratified waters released during the production process at the facilities of the Mubarak oil and gas production Administration under the territories of Bukhara region and Kashkadarya region are illuminated. [ABSTRACT FROM AUTHOR]