Switchable hydrophilicity solvents in analytical chemistry. Five years of achievements

Switchable hydrophilicity solvents (SHS) began being used in analytical chemistry only in 2015, although they have been known for a long time in chemistry and technology. In this review, the advantages of this class of solvents are considered, starting from their effectiveness in the microextraction context. SHS are compatible with chromatographic, spectroscopic (AAS, UV-Vis) and even some electroanalytical (voltammetry) techniques, which allows to determine many organic and inorganic substances in different complex matrices. The chemical analytical characteristics reported over the past 5 years, methods of analysis based on the use of SHS micro extraction, as well as their advantages and disadvantages are presented. Given the positive dynamics of publications with the use of SHS, further development of such methods are expected, primarily in terms of expanding the range of defined substances, using new systems and technical solutions aimed at improving the characteristics of spectroscopic and chromatographic methods of analysis.