Deep eutectic solvents. The new generation of green solvents in analytical chemistry

The incessant effort to perform a more sustainable chemistry has brought about the development of new materials that accomplish the principles of the green chemistry. In this context, deep eutectic solvents (DESs) have surged as one of the most promising alternatives to the use of toxic organic solvents. Their unique properties have led to a huge development of these materials and a sharp increase of their applications in the recent years in analytical chemistry. They have been applied in sample preparation and analytical techniques. The quantity of new information generated from studies associated with DESs is enormous and needs to be continuously revised. In this review, the most relevant aspects related to the application of DESs in the last five years (2016–2020) have been compiled and critically discussed in order to provide a global view about the advantages and limitations of these new materials in the area of analytical chemistry.This work has been supported by the Spanish Ministry of Economy and Competitiveness (project AGL2017-89257-P). R.R.-R. and A.S.-M. would like to thank the Canary Agency of Economy, Industry, Trade and Knowledge of the Government of the Canary Islands for the FPI fellowship (co-financed with an 85% from the European Social Funds). B.S.-R. would like to thank the Ministry of Science, Innovation and Universities for her “Juan de la Cierva” postdoctoral grant.Peer reviewe