ISSN:
0935-6304
Keywords:
Capillary gas chromatography
;
Automated on-column injection
;
Independent pressure-flow control
;
Increased inlet pressure increased temperature injection
;
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
A way of controlling the maximum allowable oven temperature during on-column injection by the column pressure drop is suggested. An arrangement using a restriction at the column outlet for adjustment of the column inlet pressure while maintaining the same column flow has been studied. Compared to non-restricted flow, substantially increased maximum oven temperatures were obtained during on-column injection. Injections at elevated temperatures resulted in an increased speed of analysis and decreased solute adsorption on the surface of the contaminated retention gap. The method is generally applicable to analysis of high boiling mixtures. In particular, with GC-AED, such an arrangement yields a higher sensitivity due to an increased solute interaction with the excitation plasma.
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/jhrc.1240180211
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