Ares, SergioGarcía Jares, Carmen MaríaLlompart Vizoso, María del PilarCela Torrijos, RafaelBarro Piñeiro, Ruth2024-01-252024-01-252004Barro, R., Ares, S., García-Jares, C., Llompart, M., Cela, R. (2005). A simple and fast micromethod for the analysis of polychlorinated biphenyls in air by sorbent enrichment and ultrasound-assisted solvent extraction. "Analytical and Bioanalytical Chemistry", vol. 381, 255–260http://hdl.handle.net/10347/31985A combination of sorbent enrichment and ultrasound-assisted solvent extraction has been used to determine polychlorinated biphenyls in air. Analytes were sampled by pumping a known volume of air through a porous polymer (Tenax TA). The enriched adsorbent was transferred into a glass vial, and ultrasound-assisted extraction of the analytes was then performed in n-hexane. Quantification was carried out by using gas chromatography coupled to tandem mass spectrometry. Breakthrough volume of the sampling step was studied, indicating that 10 m−3 of air could be processed without losses of the most volatile compounds. Good recoveries (75–86%) were obtained, and limits of detection at the sub ng m−3 were achieved for all the analytes. The proposed method is very simple and fast, voiding the use of large solvent volumes and time-consuming preconcentration steps.engAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttp://creativecommons.org/licenses/by-nc-nd/4.0/Air analysisPolychlorinated biphenylsGas chromatography–mass spectrometryUltrasound-assisted extraction230110 Espectroscopia de masas230103 Análisis cromatográficojournal article10.1007/s00216-004-2869-61618-2650open access