On-line solid phase extraction-gas chromatography-cryotrapping-infrared spectrometry for the trace-level determination of microcontaminants in aqueous samples
article
A large-volume on-column GC-cryotrapping-IR system was developed for injections of up to 100 μl of organic extracts. Considerable reduction of the solvent-and-water background and enhanced analyte detectability was achieved by using an open-split interface between the GC column and the IR detector and improving the leak-tightness of the system. The system was combined with solid-phase extraction to yield on-line SPE-GC-IR. With this set-up, sample volumes of only 20 ml sufficed to detect, and identify, microcontaminants in tap and surface water at the 0.1-1 μg/L level. Detection limits were on the order of 15 ng/L for tap water when using appropriate functional-group chromatograms. Or, in other words, SPE-GC-IR is a suitable technique for the screening of environmental water samples for functional groups, i.e. classes of compounds, of interest.
Topics
TNO Identifier
41087
ISSN
09356304
Source
HRC Journal of High Resolution Chromatography, 21 p., pp. 341-346.
Pages
341-346
Files
To receive the publication files, please send an e-mail request to TNO Repository.