Surface Deactivation in Glass Capillary Columns and Its Investigation by Auger Electron Spectroscopy

High resolution glass capillary columns for the gas chromatographic analysis of alditol acetates of neutral and amino sugars

“…These Lewis acids that are normally present in soda-lime and borosilicate glasses may be removed from the glass surface by leaching with aqueous hydrochloric acid. Depending on the degree of leaching, the surface of acid leached glass capillaries has been shown to approach fused silica in terms of the absence of metal ions [21]. In this study, the amino sugar to neutral sugar alditol acetate peak area ratio on acid leached glass capillaries was almost as high as that seen on a fused silica column.…”

Capillary gas chromatography/mass spectrometric determination of nitrogen aromatic compounds in complex mixtures

“…They are particularly pronounced in capillary GC because of the smaller sizes of analyzed samples. While generally applicable approaches to deactivation of glass capillary columns (17,18) are of relatively recent date, it is demonstrated here that simple addition of a surface-active substance to the stationary phase can largely avoid the tailing problem with bases. As demonstrated by Figure 1, the eluted peaks of various nitrogen bases are highly symmetrical.…”

Thermally stable Dexsil-400 glass capillary columns

“…A recently described (16) method for surface leaching of borosilicate glass capillary columns followed by trimethylsilylation resulted in decreased surface activity and increased thermal stability for OV-101 and SE-52 columns. We therefore attempted to produce Dexsil-400 columns using this technique.…”