Features of adsorption of organic compounds on the surface layers of alizarin transition metal complexes

Abstract

The use of untreated Silochrome C-80 in chromatography is limited due to the high retention parameters of polar compounds, blurring and asymmetry of chromatographic peaks. A method for modifying the surface of Silochrome C-80 is proposed and thermally stable gas chromatographic sorbents with a surface-deposited layer of metal alizarinates Ni, Co(II), Cu(II), Al are synthesized. The regularities of chromatographic retention were revealed and a comparative assessment of the polarity and selectivity of new sorption materials with respect to various classes of organic compounds was carried out. The use of alizarin complexes improves the symmetry of chromatographic peaks, which allows for successful separation of substances. The achieved increase in the expressiveness of the analysis occurs due to the weakening of specific intermolecular interactions as a result of modification. The possibility of using sorbents with adsorption layers of metal alizarinates in gas chromatography for the joint determination of alkyl-substituted and polyaromatic hydrocarbons is shown.