Abstract
Aluminum(III) hydrolysis and precipitation in the presence of lactic acid and salicylic acid have been studied by liquid-state 27 Al NMR. The main aluminum species appearing for pH values up to 6.5 have been identified and quantified by decomposition of the NMR spectra: unreacted and hydrolyzed aluminum species, complexed monomers, and the Al 13 tridecamer. Lactic acid forms various types of aluminum complexes according to the ligand/metal (L/M) ratio. At low lactate content (L/M≤ 1), 1:1 monodentate and 1:1 chelate are formed and the formation and aggregation of the Al 13 tridecamer takes place
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