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A method for the analysis of trace polycyclic aromatic hydrocarbons(PAHs) in aqueous samples has been established by polydimethylsiloxane(PDMS) rod aided stir bar sorptive extraction(SBSE). The homemade PDMS rod has a size of 30 mm×3 mm o.d. with a volume of ca. 200 μL, stable in thermal desorption process. The enriched PAHs by the PDMS rod were released in a homemade thermal desorption system coupled with gas chromatography. Experimental parameters for extraction of six PAHs were optimized including extraction time, pH, ionic strength and temperature of solution. The procedure has good recoveries of 80.0%―100.3% and very low limits of detection of 4.0―33 ng/L. PAHs in rain and river water were analyzed by this method.
A method for the analysis of trace polycyclic aromatic hydrocarbons (PAHs) in aqueous samples has been established by polydimethylsiloxane (PDMS) rod aided stir bar sorptive extraction (SBSE). The homemade PDMS rod has a size of 30 mm × 3 mm od with a volume of ca. 200 μL, stable in thermal desorption process. The enriched PAHs by the PDMS rod were released in a homemade thermal desorption system coupled with gas chromatography. Experimental parameters for extraction of six PAHs were optimized including extraction time, pH, ionic strength The procedure has good recoveries of 80.0% -100.3% and very low limits of detection of 4.0-33 ng / L. PAHs in rain and river water were analyzed by this method.