Development of a solid phase microextraction (SPME) method for the sampling of VOC traces in indoor air.

摘要: Solid-phase microextraction (SPME) was studied for the measurement of volatile organic compounds (VOCs) in indoor air. An adsorptive PDMS/Carboxen fibre used and an analytical methodology developed order to overcome competitive adsorption. Kinetics adsorption isotherms were investigated different sample volumes model compounds. In evaluate on fibre, these alone mixture. From results obtained, operating conditions allowing co-adsorption target determined: air is enclosed a 250 mL glass bulb where SPME exposed until equilibrium. This procedure combined with GC/MS analysis identification quantification VOCs The performances determined by using standard gas containing 10 representative environments (acetaldehyde, acetone, BTX, α-pinene, trichloroethylene, alkanes). detection limits single ion monitoring mode signal noise ratio 3. Except acetaldehyde (6 μg m−3), they are all below 0.5 m−3. Calibration curves linear up μmol m−3 good correlation coefficients (above 0.99). reproducibility ranges from 6 12% according compound. then applied comparison content classrooms two schools.