ISSN:
0935-6304
Keywords:
Gas chromatography
;
Fused silica capillary columns
;
GC/MS/DS
;
Cryotrapping of organics
;
Cryofocusing of organics
;
Trace organic analysis
;
Priority pollutants
;
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
A 30 m, 0.25 mm ID, fused silica capillary column at temperatures from -60 to -100°C has been shown to be a quantitative trap for organic compounds with volatilities ranging from that of 1, 1 -dichloroethene that of chlorobenzene. This type of “whole column cryotrapping” provided sharp peaks (peak width approximately 4-7 seconds) for all compounds at a trapping temperature of -80°C and with high carrier gas pressures and linear velocities (30 psi and 110 cm/s, respectively). Whole column cryotrapping possesses great simplicity, chromatographic efficiency (no trapping loop connections), and a built-in indicator of quality assurance for trapping efficiency (i.e., peak shape). These advantages are extremely attractive and are indicative of the fact that the potential of this approach has not yet been fully appreciated.
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/jhrc.1240060602
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