Gas chromatography silica packings with chemically bonded complexes of Cu(II) and Cr(III)

In the presented work, copper(II) and chromium(III) complexes chemically bonded to silica surface were prepared and used in gas chromatography. Chlorides of these metals were bonded to the silica surface by the use of the ketoimine group originally from 2-(3-triethoxysililpropylimino)-3-(n-butyl)-pentanone-4. Packings obtained in such way were investigated to evaluate their usefulness in the analysis of aliphatic and aromatic halogenated hydrocarbons as well as ethers, thioethers and ketones. Moreover, packings were subjected to elemental analysis and differential scanning calorimetry (DSC), thus some retention parameters were determined to characterize specific interactions between bonded metal and adsorbate molecules. Attempts were also made to separate some mixtures of the nucleophilic compounds.