We developed SRS-sensor 13C/12C isotops measurements detecting Helicobacter Pylori for medical diagnostics of human health. Measuring of absolute 13С/12С isotope amount ratios allows to explore the topical problems of the modern world, alcoholic beverages and tobacco, medical diagnostics of human health. SRS method is used to measure the ratio of carbon isotopes in the exhaled carbon dioxide, which is used to diagnose the human infection of Helicobacter pylori and the influence of the Helicobacter pylori bacterium on the occurrence of gastritis, gastric and duodenal ulcers. A method for the analysis of human infection with Helicobacter pylori was developed on the basis of measurements of the ratio of 13C / 12C carbon isotopes in human exhaled air with a high level of measurement accuracy. The article reviews the work in the field of provision comparability of absolute 13С/12С isotope amount ratios in the environment and food. The analysis of the technical and metrological characteristics of traditional and perspective instruments for measuring isotope ratios is presented. The provision of comparability of absolute 13С/12С isotope amount ratios is carried by gravimetrically prepared reference standards. The key features and emerging issues are discussed.
We developed a Raman lidar with ultraspectral resolution for automatic airborne monitoring of pipeline leaks and for oil and gas exploration. Test flights indicate that a sensitivity of 6 ppm for methane and 2 ppm for hydrogen sulfide has been reached for leakage detection.
The possibilities of the Raman method of radiocarbon measurements in the field of gas analysis are investigated. With
the help of veneer gas mixtures of carbon monoxide, carbon dioxide-12, carbon dioxide-13, methane, formaldehyde, the
micrometric characteristics of Raman lidars were found, which in most cases coincided with the claimed ones. When gas
mixtures are supplied, the diluent gas in which differs from air, the broadening of the spectral lines associated with the
interactions between the particles, the results, to significant errors in the measured concentration. These effects, which
negate the advantages of the measurement method, are investigated in the framework of this paper. The results of determining
the coefficients for correcting the readings of gas analyzers with the achievement of inaccuracies from various
diluent gases, as well as the data of the prototype Raman lidar.