| Title: | Membrane-assisted solvent extraction of triazines and other semi-volatile contaminants directly coupled to large-volume injection-gas chromatography-mass spectrometric detection |
| Author(s): | Hause B; Popp P; Kleine-Benne E; |
| Address: | "Department of Analytical Chemistry, UFZ Centre for Environmental Research Leipzig-Halle, Leipzig, Germany. hauser@ana.ufz.de" |
| DOI: | 10.1016/s0021-9673(02)00135-8 |
| ISSN/ISBN: | 0021-9673 (Print) 0021-9673 (Linking) |
| Abstract: | "A simple device was developed for in-vial liquid-liquid extraction using a polymer membrane (nonporous polypropylene) to separate an aqueous sample from an organic extractant. The membrane consisted of tubing with an internal diameter of 6 mm and a wall thickness of 0.05 mm, which was heat-sealed at the lower end and filled with 500 microl hexane. This membrane bag was incorporated into a conventional 20 ml headspace vial suitable for a multi-purpose sampler (MPS 2, Gerstel, Mulheim, Germany) directly interfaced to a gas chromatograph with a mass-selective detector. The sampler enabled the extraction vial to be mixed at a defined temperature with subsequent large-volume injection of the organic extract taken from the membrane bag. The method was evaluated using several triazines, 2,4-dichloroaniline, alpha-hexachlorocyclohexane and phenanthrene as model compounds. Extraction parameters such as temperature, agitation speed, and extraction time were optimised. Recoveries of 60-90% were achieved after 30 min extraction. By increasing the injection volume to 100 microl, detection limits of 1-10 ng/l were determined" |
| Keywords: | "Gas Chromatography-Mass Spectrometry/instrumentation/*methods *Membranes, Artificial Reference Standards Reproducibility of Results Solvents Triazines/analysis/*isolation & purification Volatilization Water Pollutants, Chemical/analysis/isolation & purifi;" |
| Notes: | "MedlineHause, Barbara Popp, Peter Kleine-Benne, Eike eng Netherlands 2002/08/22 J Chromatogr A. 2002 Jul 19; 963(1-2):27-36. doi: 10.1016/s0021-9673(02)00135-8" |
