Chemically bonded stationary phases with variable selectivity

✍ Scribed by Milos Novotný; Susan L. Bektesh; Karel Grohmann

• Book ID: 104145008
• Publisher: Elsevier Science
• Year: 1973
• Tongue: English
• Weight: 478 KB
• Volume: 83
• Category: Article
• ISSN: 1873-3778
• DOI: 10.1016/s0021-9673(00)97023-7

✦ Synopsis

Polar chemically bonded phases with hydroxy, cyano and ester functional groups were prepared by the polymerization, of trichloro-[3-(4-chloromethylphenyl)propyl]-and dichloromethyl-[3-(4-chIoromethylphenyl)butyl]silanes on porous spherical siliceous beads and the subsequent selective modification of polymeric layers. Glycol phases were obtained by the oxidation of double bonds in bonded films of allylsiloxanes.

The relative selectivities of the bonded phases for the nitroaniline isomers were measured and the chromatographic properties of substrates containing the same selective groups, but prepared from different monomers, were compared. The reproducibility of the preparation of cyano and hydroxy substrates was found to be better than that with the two-step modifications.' ' '.

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