title: Membrane-assisted liquid-liquid extraction coupled with gas chromatography-mass spectrometry for determination of selected polycyclic musk compounds and drugs in water samples.
abstract: Selected polycyclic musk compounds and drugs were extracted from water samples by membrane-assisted micro liquid-liquid extraction. The two-phase extraction system consisted of polyethylene membrane bags filled with an organic solvent. Chloroform proved to be most suited as acceptor phase to extract caffeine, Galaxolide, Tonalide, phenazone and carbamazepine from aqueous samples. The compounds were enriched from 50 mL sample into a volume of 500 microL of chloroform. Gas chromatography-mass spectrometry (GC-MS) was applied for analysis. The extraction procedure was optimised in regard to membrane material, extraction time and temperature. The evaluation of the entire analysis protocol found limits of detection that ranged from 20 to 200 ng/L. The linear range of calibration covered one magnitude with standard deviations between 4 and 12%. Method comparison with standard analysis techniques such as solid-phase extraction (SPE) combined with GC-MS as well as LC-MS-MS confirmed this method as an easy and reliable protocol, even for the monitoring of matrix-loaded wastewater. The analysis of real samples established the feasibility of the technique.
authors.affiliation: UFZ-Centre for Environmental Research Leipzig-Halle in the Helmholtz Association, Department of Analytical Chemistry, Permoserstrasse 15, D-04318 Leipzig, Germany.
authors.forename: T
authors.initials: T
authors.lastname: Einsle
authors.forename: H
authors.initials: H
authors.lastname: Paschke
authors.forename: K
authors.initials: K
authors.lastname: Bruns
authors.forename: S
authors.initials: S
authors.lastname: Schrader
authors.forename: P
authors.initials: P
authors.lastname: Popp
authors.forename: M
authors.initials: M
authors.lastname: Moeder
mesh_terms: D002138:Calibration; D002853:Chromatography, Liquid / Q000379:methods*; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D004364:Pharmaceutical Preparations / Q000032:analysis*; D011083:Polycyclic Compounds / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D004364:Pharmaceutical Preparations; D011083:Polycyclic Compounds; D014874:Water Pollutants, Chemical