Abstract
A number of developments in the high-performance liquid chromatography of metallo-organic complexes are described. Micellar chromatography of cobalt(III)—iminodiacetate isomer anions has been carried out with hexadecyltrimethylammonium bromide surfactant, with full resolution of cis and facial trans isomers. A dynamic ion-exchange micellar mechanism is proposed. Neutral N,N′-ethylenebis(acetylacetoneimine) chelates of copper(II) and nicker(II) are separated using sodium dodecyl sulfate in methanol—water as the mobile phase, which constrains the copper complex to be eluted before the nickel chelate. The separation of thermally labile isomers of aluminium trifluoroacetylacetonates is described, isomerization being precluded at O°C. Direct-current argon plasma emission spectral detection is used to confirm elution of cobalt, chromium at aluminum complexes.
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