Solution properties of aluminum and titanium complexes with o-chlorophenylfluorone and competition coordination for selective determination of trace amounts of titanium

The competition coordination for selective determination (CCSD) is describe d 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 correcti on technique in place of ordinary spectrophotometry. The complexes are form ed as [Al(o-CPF)(3)](3-) and [Ti(o-CPF)(3)](2-) and their stepwise and cumu lative stability constants are calculated. Trace amounts of Ti can substitu te 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.