Manufacture of glass open-tubular columns by dehydration of the surface

J. Simon, L. Szepesy

Research output: Article

20 Citations (Scopus)


Methods are described for the preparation and coating of glass open-tubular columns. By dehydration of the inner surface during the drawing operation, an oxide-type glass surface can be obtained which is completely wettable by non-polar and most polar liquid phases without further treatment. For coating the columns, a modified dynamic method was used. Squalane and OV-101 were used as non-polar phases and Ucon LB, Carbowax 20M and OV-17 as polar phases. Our procedure resulted in open-tubular columns of high efficiency, having a thin uniform film (0.03-0.1 μm) and possessing 3000-10 000 theoretical plates per metre. In order to decrease the phase ratio, small-diameter columns (0.1-0.15 mm) were used. Several of these columns have been in routine daily use for nearly 1 year without any decline in efficiency.

Original languageEnglish
Pages (from-to)495-504
Number of pages10
JournalJournal of Chromatography A
Issue numberC
Publication statusPublished - ápr. 28 1976

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biochemistry
  • Organic Chemistry

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