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Soluble complexes of aluminum, including fluorides, citrates, acetates, and silicate, were separated from uncomplexed Al and quantitated using gradient elution cation exchange HPLC. Fluorescence detection of the Allumogallion complex allowed detection as low as 7 nM with linearity to 58 µ and relative standard deviations of 3% at the 2 µ level. Dissociation of the complexes on the column and inadequate detection of A1 organic complexes, problems in previous methods, were not observed. Species concentrations at various pH and ionic

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