Liquid-liquid microextraction techniques based on in-situ formation/decomposition of deep eutectic solvents

Deep eutectic solvents (DESs) have lately gained attention as a viable green substitute for traditional ionic liquids (ILs) and hazardous organic solvents, due to their low toxicity, ease of synthesis procedures, low-cost, and high biodegradability. The DESs are introduced as a eutectic combination of two or more green components with a high capability to form hydrogen bonds. Following the emergence of DESs, their applications in numerous domains of analytical chemistry, particularly in various extraction approaches, are growing rapidly. The facile synthesis procedures of these solvents based on hydrogen bonding have permitted the development of a number of innovative liquid-liquid microextraction (LLME) strategies based on the in-situ formation or in-situ decomposition of these solvents. To offer up-to-date information in this field, this review is provided a summary of literature dealing with the LLME approaches based on the in-situ formation/decomposition of the DESs.(c) 2023 Elsevier B.V. All rights reserved.

Automated summary

Deep eutectic solvents (DESs) are gaining attention as green alternatives to traditional ionic liquids and hazardous organic solvents due to their low toxicity, easy synthesis procedures, low cost, and high biodegradability. These solvents, which are a mixture of two or more green components with a high capability to form hydrogen bonds, are being rapidly applied in various extraction approaches in the field of analytical chemistry. The facile synthesis procedures of DESs based on hydrogen bonding have led to the development of innovative liquid-liquid microextraction (LLME) strategies involving the in-situ formation or decomposition of these solvents. This review provides a summary of literature on LLME approaches based on the in-situ formation/decomposition of DESs to offer up-to-date information in this field.