Vol 15, No 3 (2025)

In the article, based on analysis of production processes and interviews with the heads and
experts of the ROSA Analytical Center, discussed the features of the technical base, the
specifics of quality management, personnel training, problems of import substitution of
equipment, and the practice of developing and implementing unique methods.

This publication is the seventh in a series of articles containing the results of regular scientometric monitoring of analytical chemistry. The identified cutting-edge areas (fronts) of research are based on highly cited publications, grouped into clusters by frequent cocitation. In 2024, as before, there are many areas of research and development related to sensor devices used in medical diagnostics (COVID‑19, etc.), as well as in the analysis of environmental objects and food products. Attention to microplastics, an environmental pollutant, remains high. An extensive scientific field has emerged in which analytical methods are considered according to conditional criteria of colourfulness.

A rapid method for determining the sugar content and alcohol content of grape wines
with-out preliminary distillation of ethyl alcohol is proposed. The method is based on
measuring the refractive index and density of the sample and using the additivity principle of refracto-densimetric characteristics – the refraction intercept and specific refraction. The method can be used in laboratory conditions, and in the presence of pairs of immersion or flow refractometers and densimeters (densitometers) built into process tanks or product pipelines, it can be implemented in production. The method considers wines as pseudoternary mixtures of aqueous solutions of sugars (fructose : glucose 1 : 1), ethanol and organic acids (tartaric : malic 3 : 1 wt.). Other minor components of wines, close in refracto-densimetric characteristics to the acid benchmark, also implicitly contribute to the last component. The method has no concentration restrictions on the components to be determined. The trajectories of the fermentation process of sugar and grape must are shown on the Kurtz-Lorentz chemographic map. A simplified version of the method considers wines as binary mixtures of aqueous solutions of sugars and ethyl alcohol, in which case the composition of wines can be determined graphically using the Kurtz-Lorentz nomogram or calculated using a similar algorithm. The results of measuring wine samples show good agreement between certain composition indicators and those declared by producers.

This article presents a new approach to controlling large-sized electrochromic devices based on the charge-discharge method. The developed method eliminates the problem of the edge effect and significantly equalizes the electro-optical characteristics of these products: 47 times compared to the galvanostatic control mode and 13.7 times compared to the pulse method. This, in turn, helps to increase the service life of large-sized electrochromic devices.