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Hydrothermal treatment of fused silica capillary columns

✍ Scribed by Ogden, M. W. ;McNair, H. M.

Publisher: John Wiley and Sons
Year: 1985
Tongue: English
Weight: 490 KB
Volume: 8
Category: Article
ISSN: 0935-6304
DOI: 10.1002/jhrc.1240080702

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✦ Synopsis

The activity of fused silica capillary tubing has been shown to vary considerably, which severely influences the reproducibility of column deactivation and inertness. Methods for producing a reproducible, high activity surface with maximum hydroxylation by various hydrothermal treatments were evaluated. Columns pretreated with 20% nitric acid at 2OOOC for 10 hours, deactivated with D,, coated with OV-73, and crosslinked with azo-tertbutane were found to possess excellent inertness for sensitive analytes such as alcohols, amines, and alkaloid drugs.

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