Abstract
The competition coordination for selective determination (CCSD) is described and the complexations of Ti(IV) and Al(III) with o-chlorophenylfluorone (o-CPF) is studied at pH 4.5 in presence of Triton X-100. The determination of equilibrium constants of the complexes was made by the spectral correction technique in place of ordinary spectrophotometry. The complexes are formed as [Al(o-CPF)3]3− and [Ti(o-CPF)3]2− and their stepwise and cumulative stability constants are calculated. Trace amounts of Ti can substitute Al from its o-CPF complex and the competition coordination has been used in the quantitative determination of Ti in water samples with satisfactory results.
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