Extracts Obtained by Natural Deep Eutectic Solvents (NDESs) Extraction As Potential Functional Food Additives

Abstract

Due to the continuous demand of green extraction procedures, Natural Deep Eutectic Solvents (NDESs) have arisen in the last years as new green solvents alternative to the conventional organic ones. Compared with conventional organic solvents, NDESs are eco-friendly, biodegradable and non-toxic organic compounds which are also a low cost, being easy to produce in the laboratory. The aim of this paper is to give overview of NDESs extraction and to develop an extraction method for lemon balm (Melissa officinalis) polyphenolic compounds. From a preliminary screening of 5 different natural deep eutectic solvents combination of betaine and sucrose was selected. The effect of water in eutectic mixture was investigated using selected mixture. The best results were obtained with 50 % w/w water added to eutectic mixture.