Liquid chromatographic trace enrichment with on-line capillary gas chromatography for the determination of organic pollutants in aqueous samples

✍ Scribed by Noroozian, E. ;Maris, F. A. ;Nielen, M. W. F. ;Frei, R. W. ;de Jong, G. J. ;Th. Brinkman, U. A.

• Publisher: John Wiley and Sons
• Year: 1987
• Tongue: English
• Weight: 760 KB
• Volume: 10
• Category: Article
• ISSN: 0935-6304
• DOI: 10.1002/jhrc.1240100104

✦ Synopsis

Trace enrichment for the GC analysis of a series of chlorinated pesticides and polychlorinated biphenyls (PCBs) in aqueous samples has been achieved through a simple on-line technique involving sorption on an LC micro-precolumn followed by direct elution into a gas chromatograph with hexane. A 5-m retention gap coupled to the capillary GC column served as the recipient of a relatively large sample volume (ca. 100 pl) introduced into the GC. Partially concurrent solvent evaporation during sample introduction allowed a large sample capacity.

Recoveries of more than 95 YO were observed for the majority of the compounds studied. Using 1.0 ml aqueous samples, detection limits of less than 1 ppt were found. The applicability of the developed method was demonstrated for a river water sample.