Polymer—inorganic selective adsorbents for gas chromatography produced by graft polymerization

• Published in: Journal of Chromatography A 1990-11, Vol.520, p.21-31
• Main Authors: Dmitrenko, A.V., Shadrina, N.E., Ivanchev, S.S., Ulinskaya, N.N., Volkov, A.M.
• Format: Article
• Language: English
• Subjects: Analytical chemistry; Chemistry; Chromatographic methods and physical methods associated with chromatography; Exact sciences and technology; Gas chromatographic methods
• ISSN: 0021-9673
• DOI: 10.1016/0021-9673(90)85080-F

The possibilities for a new approach to the development of polymer—inorganic sorbents with improved sorptive separation properties for the gas chromatographic analysis of organic compounds of different classes including strongly polar and high-boiling types are discussed. The method involves graft radical polymerization of vinyl monomers on the solid inorganic surface modified by chemical fixation on it of silicon containing unsaturated polymerizable compounds and hydroperoxides. The influence of the microstructure of polymer layers grafted to inorganic particles on the sorption properties of polymer—inorganic systems in the gas chromatographic separation of sorbates of different natures is shown. The separation properties of polymer—inorganic sorbents are shown to vary on changing the chemical nature of the grafted polymer layer. Possible methods for the direct control of the properties of polymer—inorganic sorbents are proposed. New highly effective and selective sorbents based on homopolymers and copolymers of styrene and some nitrogen-containing monomers were prepared. These sorbents give 2–5 times faster separations of organic sorbates, including aromatic compounds, than well known polymer sorbents.