Pyrocarbon is a generic term for a variety of allotropic modifications of carbon which can be distinguished from other carbonaceous allotropes, such as diamond and soot, by the fact that they are hard, black, and strong. Some properties, which are pertinent to the present communication, are listed i
Interactions of aldehydes and ketones with the surface of fused silica capillary columns
โ Scribed by Anthony, L. J. ;Holland, R. A. ;Heffner, S. A.
- Publisher
- John Wiley and Sons
- Year
- 1988
- Tongue
- English
- Weight
- 527 KB
- Volume
- 11
- Category
- Article
- ISSN
- 0935-6304
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โฆ Synopsis
Chromatography
bony1 functional groups at bonded silanol sites on the surface. It is further shown that simple test mixtures containing aldehydes or ketones can be used to probe the concentration of water and bonded silanols on the surface and thus to evaluate capillary manufacturing processes and thermal and chemical surface treatments.
๐ SIMILAR VOLUMES
## Abstract In this work, an investigation of new organosilicon hydride reagents with phenyl functional groups for deactivation and surface modification of fused silica capillary columns is described. Different reagents were tested for their ability to deactivate the fused silica surface, and actua
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 evalua
The life expectancy and resistance to flow, pressure shocks, solvent gradients, and bending of packed fused silica capillary columns (Micro-LC) are discussed. ## 2 Instrumentation Chromatographic measurements were carried out on a Varian 5020 (Varian Associates, Walnut Creek, CA, USA) and on a Per