A spectrophotometric study of the formation of the peroxotitanium(IV) complex and its application to the determination of beryllium

The formation of peroxotitanium(V) complexes has been studied spectrophotometrically in (a) Ti(IV)-H2O2, (b) Ti(IV)-H2O2-HF and (c) Ti(IV)-H2O2-HF-Be(II) systems containing 2 M hydrochloric acid. In system (a), only a 1:1 peroxotitanium(IV) complex is evident. In system (b), the competitive formation of the peroxotitanium(IV) complex and fluorotitanium(IV) complexes is discussed. In system (c), the formation of fluoroberyllium(II) complexes causes an increase in concentration of the peroxotitanium(IV) complex which is proportional to the concentration of added beryllium(II). The determination of beryllium in a Cu-Be alloy was successful with a Ti(IV)-H2O2-HF reagent