Summary
In this paper a new sealing method for the static coating of capillary columns is described. When one end of the fully filled capillary was immersed into liquid nitrogen in a Dewar flask, the coating solution at this end would be frozen and became a temporary seal, and an air-free solvent/seal interface was obtained. No bumping has ever been found at the interface, even when butane was used as solvent. By applying this sealing method, several capillary columns, including some narrow bore capillary, had been successfully coated.
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Yin, H.F., Huang, A.J. & Sun, Y.L. A novel sealing method in static coating fused-silica capillary column. Chromatographia 28, 313–314 (1989). https://doi.org/10.1007/BF02260783
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DOI: https://doi.org/10.1007/BF02260783