Polydimethylsiloxane rod extraction, a novel technique for the determination of organic micropollutants in water samples by thermal desorption-capillary gas chromatography-mass spectrometry.
A novel, simple and inexpensive approach to absorptive extraction of organic compounds from environmental samples is presented. It consists of a polydimethylsiloxane rod used as an extraction media, enriched with analytes during shaking, then thermally desorbed and analyzed by GC-MS. Its performance was illustrated and evaluated for the enrichment of sub- to ng/l of selected chlorinated compounds (chlorobenzenes and polychlorinated biphenyls) in water samples. The new approach was compared to the stir bar sorptive extraction performance. A natural ground water sample from Bitterfeld, Germany, was also extracted using both methods, showing good agreement. The proposed approach presented good linearity, high sensitivity, good blank levels and recoveries comparable to stir bars, together with advantages such as simplicity, lower cost and higher feasibility.
Montero
L
L
Department of Analytical Chemistry, UFZ-Centrefor Environmental Research, Permoserstrasse 15, Leipzig 04318, Germany. larisse.montero@ufz.de
Popp
P
P
Paschke
A
A
Pawliszyn
J
J
D004129:Dimethylpolysiloxanes / Q000302:isolation & purification*; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods*; D009930:Organic Chemicals / Q000032:analysis*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012828:Silicones / Q000302:isolation & purification*; D014874:Water Pollutants, Chemical / Q000032:analysis*
D004129:Dimethylpolysiloxanes; D009930:Organic Chemicals; D012828:Silicones; D014874:Water Pollutants, Chemical; C013830:baysilon