At-line spe-gc-ms of micropollutants in water using the prepstation
article
An automated at-line SPE-GC-MS system for the determination of micropollutants in aqueous samples, which is based on the PrepStation and uses large-volume on-column injections, has been redesigned. A cartridge made from stainless steel and polychlorotrifluoroethylene and a 2-needle system was constructed which allow the determination of micropollutants at the low ng/L level without interferences from impurities extracted from the septa of the vials or the commercial cartridges. No time-consuming pre-cleaning of the cartridges or septa is required. The SPE sample extract (300 μL) is transferred from the sample preparation module to the autosampler of the GC-MS and 50 or 100 μL are injected. The analytical characteristics of the integrated 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 acquisition. The system proved to be robust during the analysis of more than 100 tap and river water samples. © Springer-Verlag 1999.
TNO Identifier
71495
ISSN
09370633
Source
Fresenius Journal of Analytical Chemistry, 364(1-2), pp. 106-112.
Pages
106-112
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