SEPARATION OF LANTHANIDE BETA-DIKETONATES VIA ORGANOPHOSPHORUS ADDUCT FORMATION BY SUPERCRITICAL FLUID CHROMATOGRAPHY

摘要

This paper describes a novel method for separation and detection of lanthanide beta-diketonates by adduct formation/supercritical fluid chromatography (SFC) with an open-tubular capillary column and a FID detector. Separation of lanthanide beta-diketonates cannot be achieved by SFC due to the hydration of the complexes, which cannot be achieved by SFC due to the hydratin of the complexes, which exhibit strong intermolecular interactions and decomposition in the system. Formation of adducts of lanthanide beta-diketonates with a neutral donor, tributylphosphine oxide (TBPO) or trioctylphosphine oxide (TOPO), alters their SFC behavior. The adduct formation approach leads to the first successful separation of lanthanide complexes of the same beta-diketone ligand by SFC using neat CO(2)as the mobile phase.