At-line SPE-GC-MS of micropollutants in water using the PrepStation

Citation
T. Hankemeier et al., At-line SPE-GC-MS of micropollutants in water using the PrepStation, FRESEN J AN, 364(1-2), 1999, pp. 106-112
Citations number
18
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences
Journal title
FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY
ISSN journal
09370633 → ACNP
Volume
364
Issue
1-2
Year of publication
1999
Pages
106 - 112
Database
ISI
SICI code
0937-0633(199905)364:1-2<106:ASOMIW>2.0.ZU;2-#
Abstract
An automated at-line SPE-GC-MS system for the determination of micropolluta nts in aqueous samples, which is based on the PrepStation and uses large-vo lume on-column injections, has been redesigned. A cartridge made,from stain less steel and polychlorotrifluoroethylene and a 2-needle system was constr ucted which allow the determination of micropollutants at the low ng/L leve l without interferences from impurities extracted from the septa of the via ls or the commercial cartridges. No time-consuming pre-cleaning of the cart ridges or septa is required. The SPE sample extract (300 mu L) is transferr ed from the sample preparation module to the autosampler of the GC-MS and 5 0 or 100 mu L are injected. The analytical characteristics of the integrate d procedure such as analyte recovery (typically 80-105%) and repeatability (RSDs, 2-9%), were satisfactory. Several micropollutants were detected in ( unfiltered) river water at the 0.2-400 ng/L level using full-scan MS acquis ition. The system proved to be robust during the analysis of more than 100 tap and river water samples.