The Use of Support-bonded Silicones for the Extration of Organochlorines of Interest from Water

Water was spiked with various types of chlorinated organics at trace levels, in an effort to demonstrate the pontential of support-bonded silicones to collect these pollutants from natural aqueous systems. Greater amounts of the spiked water were pumped through a bed of a silicone phase, followed by a small amount of pentane. The pentane eluted the collected organochlorines, ready for determination by electron capture gas chromatography. This approach proved successfl for most model compounds of parts per trillion levels. © 1972

On the Unexpected Behavior of a Common Gas Chromatographic Phase

Carbowax 20M was coated on Chromosorb W, heat-treated at 280°, and exhaustively extracted. The remaining support performed chromatographically in a manner similar to highly efficient, well deactivated gas-liquid chromatographic packings, even though the non-extractable polymer film was too thin to permit reliable combustion analysis. This phase was well suited for the analysis of polar compounds, producing symmetric, sharp peaks with very short retention times. A strong surface effect was evident, which could be utilized for otherwise difficult separations. © 1973

Non-extractable Polymer Coatings (modified Supports) for Chromatography

The technique of producing extremely thin, non-extractable polymer layers on diatomaceous supports has been extended from Carbowax 20M to a variety of polar and non-polar polymers commonly used in gas-liquid chromatography. © 1973

Synthesis and Chromatographic Application of Bonded, Monomolecular Polymer Films on Silicic Supports

Through heat-treatment and exhaustive extraction with various solvents, a new type of chromatographic phase can be obtained from common GLC packings. It may be nominally considered a bonded, monomolecular polymer layer on either silica gel or diatomaceous earth supports. The characteristics of these highly deactivated phases are short retention times and the capability to separate polar, closely related substances in GC, and an improvement of resolution in LC