Applications of fused-silica wall-coated open-tubular columns : II. Non-fluorinated Schiff base chelates

Abstract

The gas chromatography on fused-silica capillary columns are reported for seventeen transition metal complexes on non-fluorinated Schiff base ligands, including aminothione ligands. Data presented include chromatograms showing various group separations, column activity effects, detection limits, specific retention volumes, rate constants for the chelate decompositions and enthalpies for the solution processes in the bonded stationary phases. The fused-silica columns were found to be generally superior to packed columns, particularly with regard to peak symmetry and resolution. However, activity effects were still evident, with distinct contributions from reversible adsorption, irreversible adsorption and catalysis being observed. The reactive nature of some of the chelates, notably the aminothione chelates and palladium and platinum chelates, seems to preclude their utilization for analytical purposes.