1-ALKYL-3-METHYLIMIDAZOLIUM TETRAFLUOROBORATE AS AN ALTERNATIVE MOBILE PHASE ADDITIVES FOR DETERMINATION OF HALOPERIDOL IN PHARMACEUTICAL FORMULATION BY HPTLC UV DENSITOMETRIC METHOD

Abstract

An alternative thin-layer chromatography (TLC) method for the determination of haloperidol in pharmaceutical formulation against the method proposed by European Pharmacopeia (7.0) has been compared and described. The proposed method uses a mobile phase composed of acetonitrile/ water, 60:40, with the addition of 1.5% (v/v) 1-ethyl-3-methylimidazolium tetrafluoroborate ionic liquid. The ionic liquid modifiers of a mobile phase have been shown to be suitable suppressor of silanol ionization in the TLC of basic drugs. Besides the silanol-suppressing potency of the 1-ethyl-3-methylimidazolium tetrafluoroborate, the lack of interaction and interference with UV densitometric detection was observed. These properties open a new possibilities in the application of alky-imidazolium-based ionic liquids in chromatographic techniques.