Determination of Titanium in Some Metallurgical Materials by Atomic Absorption Spectrophotometry

Publisher Website
Google Scholar
Abstract
The atomic absorption spectrophotometric determination of titanium was subject to interference by other elements in a nitrous oxide-acetylene flame with a Perkin-Elmer Model 303 atomic absorption spectrophotometer, fitted with a 5-cm long-path slot burner. The effects of various other elements, acids, and water-miscible organic solvents on the titanium atomic absorption were examined. Aluminum produced the greatest enhancement of the titanium absorption of all the elements examined. Both butyric acid (2.0 M) and diethylene glycol mono-butyl ether (20%) enhanced the titanium absorption by about 100% in aqueous solutions. In the presence of 5000 ppm aluminum or 20% diethylene glycol monobutyl ether, the interferences from other elements appeared to be completely removed. Furthermore, the extraction of titanium with cupferron into methyl isobutyl ketone was successful in effecting an increase in the sensitivity of titanium and in eliminating, or at least diminishing the interferences from other elements. The atomic absorption method was then applied to the determination of titanium in ferric oxides, nickel-chromium steel, nickel alloy, and steels with satisfactory results.