Chemistry Research and Practice
- ISSN: 3065-906X
K A Kuliyev and N A Verdizade
A very simple, rapid and sensitive spectrophotometric procedure for the determination of trace amounts of titanium (IV) is described using 2,6-dimercapto-4-isopropylphenol as a new reagent in the presence of a hydrophobic amine. Of the hydrophobic amines, aniline, N -methylaniline and N, N -dimethylaniline were used. Titanium (IV) was reacted with 2,6-dithiol4-isopropylphenol and hydrophobic amines in a weakly acidic medium at pH 3.3-4.6 using acetate buffer solution to form an orange colored stable complex of 1:2:2 composition with a maximum absorption at 438-446 nm. The complex is formed instantly and remains stable for 2 hours. Beer's law is observed in the range of 0.05-12 μg ml-1 with a molar absorptivity of (2.50-2.68) × 10 4 L mol -1 cm -1. The proposed methods have been successfully applied to the determination of titanium in metallic aluminum, wastewater and seawater.