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Static coating of capillary columns using mixed solvents

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Summary

Mixed solvents in coating solutions were employed to facilitate (lower temperatures and shorter times) the static coating of capillary columns. Different volume ratios of mixed solvents used in the coating solutions do not affect the quality of capillary columns coated with stationary phases of different polarity. Small diameter (<100 μm i.d.) capillaries of up to 50 m long were successfully coated with a methylphenylpolysiloxane (50% phenyl) for use in supercritical-fluid chromatography. In addition, an 80 m×0.31 mm i.d. capillary was statically coated with Superox 20 M (0.25 μm film thickness) in a 1∶1n-pentane/methylene chloride mixture at 55 °C. The coating time was only 7 hrs, and the resultant column exhibited a total of 170,000 theoretical plates (k′=5.5).

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Authors and Affiliations

  1. Department of Chemistry, Brigham Young University, 84602, Provo, Utah, USA

    R. C. Kong & M. L. Lee

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  1. R. C. Kong
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  2. M. L. Lee
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Kong, R.C., Lee, M.L. Static coating of capillary columns using mixed solvents. Chromatographia 17, 451–453 (1983). https://doi.org/10.1007/BF02262929

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  • DOI: https://doi.org/10.1007/BF02262929

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