Methods of Purification of Organic Compounds - GeeksforGeeks
Purification and concentration of formic acid from formic acid/gluconic acid mixtures by two successive steps of nanofiltration and reactive liquid-liquid extraction - ScienceDirect
Affinity ionic liquids for the rapid liquid–liquid extraction purification of hexahistidine tagged proteins - ScienceDirect
Recovery and purification of ionic liquids from solutions: a review - RSC Advances (RSC Publishing)