Linked Versus Chemically Bonded Phase

Cross-Linked Versus Chemically Bonded Phase 

Madani et al. provided the first detailed description of capillary columns where polysiloxanes were immobilized by hydrolysis of dimethyl- and diphenylchlorosi-lanes (77,78). Interest increased when Grob found that the formation of cross-linked polysiloxanes resulted in enhanced film stability (79). Blomberg et al. illustrated in situsynthesis of polysiloxanes with silicon tetrachloride as a precursor, followed by polysiloxane solution (80,81). Since then, various approaches to cross-linking have been investigated. These include chemical additives such as 

Gamma radiation from a Co source has also been used by Schomburg et al. (43), Bertsch et al. (94), and Hubball and co-workers (95-97) as an effective technique for cross-linking polysiloxanes. In a comparative study of gamma 

Developments in the cross-linking of polyethylene glycols have been slower in forthcoming, although successes have been reported. Immobilization of this phase by the following procedures increases its thermal stability and its compatibility and tolerance for aqueous solutions. De Nijs and de Zeeuw (100) and Buijten et al. (101) 

MS-Grade Phases Versus Polysilarylene or Polysilphenylene Phases 

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Cross-Linked Versus Chemically Bonded Phase... 

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