Characterization of Chemically Bonded Alumina Beads Prepared by Modification with Titanate Coupling Reagents for Column Packings in Gas Chromatography

Abstract

New chemically bonded column packings were prepared by treatment of alumina with some titanate coupling reagents. Isopropoxytitanium(IV) tristearate(TTS) was found to be the most effective modifier among the titanate coupling reagents used. Using the column packed with ITS-bonded alumina, hydrocarbons and dialkyl ethers were eluted as symmetric and slightly skewed peaks, respectively, but alcohols were not significantly eluted. t-Butyl alcohol and t-butyl methyl ether were, however, eluted as sharp peaks in a very short time. The specific surface area of the TTS-bonded alumina and the retention volume of a solute were analyzed as a function of the amount of surface-bonded TTS.