Fabrication of columns for open-tubular liquid chromatography using photopolymerization of acrylates
1990; Elsevier BV; Volume: 516; Issue: 2 Linguagem: Inglês
10.1016/s0021-9673(01)89272-4
ISSN1873-3778
AutoresS. Eguchi, J. G. Kloosterboer, C.P.G.M. Zegers, Peter J. Schoenmakers, P.P.H. Tock, J.C. Kraak, H. Poppe,
Tópico(s)Microfluidic and Capillary Electrophoresis Applications
ResumoIn liquid chromatography, a significant improvement of separation can be achieved by using 5–10-μm I.D. open capillaries instead of packed columns. In these capillaries relatively thick (0.3–2 μm) films of stationary phases are required. These are difficult to prepare if polymer solutions are to be used. The fabrication of thick polymer films inside quartz-glass capillaries using chain cross-linking photopolymerization of monomers in liquid solution rather than cross-linking of polymers cast from solution is described. In a 9-μm capillary a film thickness of about 0.3 μm was readily prepared and plate numbers of 7 · 104 to 1.2 · 105 m−1 were obtained. The photopolymerization process can be carried out under either static or dynamic conditions. The latter method facilitates the manufacture of long columns with a length of several metres. The experimental conditions for making smooth coatings using a siloxane acrylate together with lauryl acrylate as a reactive diluent, and methods for inspection and testing of these columns, are described.
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