The most appropriate solvent was selected for extracting the
targeted analytes from the sample matrix. The physicochemical
properties of ionic liquids depend on their structure, which might
greatly affect the extraction efficiency of the targeted analytes
Thus, 1-alkyl-3-methylimidazolium-type ionic liquids with
different anions and different alkyl chain lengths of the cations
were investigated to select the optimal ionic liquids as extraction
medium.