Analysis of six preservatives in beverages using hydrophilic deep eutectic solvent as disperser in dispersive liquid-liquid microextraction based on the solidification of floating organic droplet

•Hydrophilic DES was synthesized and used as a new dispersive solvent.•Six preservatives were successfully extracted from beverages by DLLME-SFO method.•This method was a green, inexpensive, simple and efficient technique.