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Titel (primär) Headspace sorptive extraction using silicone tubes for the determination of chlorobenzenes in water
Autor van Pinxteren, M.; Montero, L.; Jäsch, S.; Paschke, H.; Popp, P.;
Journal / Serie Analytical and Bioanalytical Chemistry
Erscheinungsjahr 2009
Department ANA; GWS;
Band/Volume 393
Heft 2
Sprache englisch;
Keywords Silicone tube; Headspace; Chlorobenzenes; Water; Thermodesorption-gas chromatography-mass spectrometry
Abstract A new approach for headspace sorptive extraction is presented and demonstrated for the determination of 12 chlorobenzenes in water samples. It consists of a silicone tube (15-mm length) arranged around a stainless steel rod. This device is fixed on a septum cap and exposed to the headspace of 50 mL of a salt-saturated water sample. After extraction (60-min optimized extraction time), thermodesorption is carried out by direct insertion of the silicone tube into the thermodesorption-gas chromatography-mass spectrometry system. Desorption of the analytes is performed at 250 °C for 5 min with a gas flow of 50 mL/min. Repeatability (relative standard deviation 5-10%), extraction yields (9-46%), enrichment factors (129-657), and detection limits (0.002-0.012 µg/L) were determined and four real water samples were analyzed with the headspace tube extraction. The results were verified by standard addition. A comparison of headspace tube extraction with other headspace enrichment techniques underlined the high extraction capacity of the proposed method. A big advantage of tube extraction is the low cost of the silicone material. The tubes can be discarded after single use, avoiding carryover problems and cross-contamination.
ID 673
dauerhafte UFZ-Verlinkung https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=673
van Pinxteren, M., Montero, L., Jäsch, S., Paschke, H., Popp, P. (2009):
Headspace sorptive extraction using silicone tubes for the determination of chlorobenzenes in water
Anal. Bioanal. Chem. 393 (2), 767 - 775