TRENDS IN DEVELOPMENT AND APPLICATION OF CLOUD POINT EXTRACTION (REVIEW)

The work is dedicated to the review of trends in the development and peculiarities of analytical application of micellar extraction concentration: the features of using scientometric approaches as a tool for quantitative assessment of development trends are studied, the trends in the development of micellar extraction concentration are analyzed scientometrically, data on examples of analytical application of micellar extraction concentration in chemical analysis are summarized, principles, advantages, disadvantages and application of innovative extraction approaches at the cloud point, which are less known within the specified period (2018–2024) are considered. Cloud point extraction is a promising approach to preconcentration in analysis, and its main advantages are high extraction efficiency, environmental attractiveness, cost-effectiveness, the possibility of coupling with a wide range of detecting methods and is suitable for determination trace amounts of various analytes. Analysis of trends in the development of approaches to cloud point extraction indicates a growing interest in their use in analysis, and the improvement of the method is aimed at increasing selectivity, reducing detection limits and expanding the range of surfactants used. A scientometric study was conducted on the use of cloud point extraction in analytical practice and it was shown that systems with nonionic surfactants are the most common. It is noted that one of the disadvantages of the method is the need for prolonged heating of solutions, which significantly limits the range of analytes, and ways to overcome this disadvantage are outlined: ultrasonic cloud point extraction, chemically initiated cloud point extraction, synergistic cloud point extraction, etc. Thus, it can be stated that approaches to cloud point extraction preconcentration are actively modified and modernized, which contributes to improving the analytical characteristics of modern combined methods of analysis.