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A sensitive spectrophotometric method for the determination of titanium (IV) using gallacetophenone phenylhydrazonewith applicatin to ilmenite

D.Venkataramana Reddy, A.Varada Reddy

The spectrophotometric determination of titanium (IV) using gallacetophenone phenylhydrazone (GPPH) is a sensitive and fairly selective method when compared to other spectrophotometric methods. Titanium( IV) is determined bymeasuring the absorbance of the orange colored complex at 375 nm in the pH range 2.3-2.8. Beer’s law is obeyed over the range 0.1-1.2 gml-1. Themolar absorptivity and the Sandell’s sensitivity of the complex are found to be 3.254  104 l mol-1cm-1 and 0.0015 g cm-2 respectively. The stoichiometry of the complex as determined by job’s continuous variation andAsmus methods is 1:2 (metal:ligand) and its stability constant at 300Cis 2.73  107. Themethod is applied for the determination of titaniumin ilmenite.