A new spectrophotometric method for the determination of titanium using the formation of titanium(IV)-Calcichrome complex
Studies on Calcichrome as a spectrophotometric reagent. V
1966 Volume 15 Issue 8 Pages 821-825
Details
1966 Volume 15 Issue 8 Pages 821-825
It has been found that Calcichrome forms a complex with titanium(IV) and the reaction has been studied spectrophotometrically to find the optimum conditions for the determination of titanium.
The titanium(IV)-Calcichrome complex is formed gradually at about pH 4 and its composition was found to be 1 : 1. The complex has two absorption maxima approximately at 310 and 565 mμ when measured against water. Linear relationship was noticed between titanium(IV) concentration and absorbance under the conditions proposed. The molar extinction coefficient of the complex at 530 mμ was 11, 500 and the sensitivity was 4.2 × 10-3 μg Ti/cm2 for log(I0/I) =0.001. Many other metals such as copper(I and II), aluminum, iron(II and III), vanadium(V), etc. interfere with the determination. A new procedure was proposed for the determination of titanium.
