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In this work, problems related to calibr ation of solid phase microextraction (SPME) device were described . The ef fects of humidity and temperature on organic pollutants sampling from gaseous matrices on a 100 µm PDMS coated SPME fiber were studied. Standard gaseous mixtures used in these studies were gener ated by the permeation method and humidified to known lev- els of relati ve humidity. The SPME-GC-MS based procedure was used to determine organic vapours (carbon tetrachloride , toluene, chlorobenzene, p-xylene and n-decane) in a laboratory air. Key wo rd s. Solid phase micro ex t raction — gas c h ro m at ograp hy — calibration — v o l atile organic air pollutants — mass spectrometry.

analusis

Analysis of selected gaseous organic micro-pollutants in air by means of solid phase microextraction-gas chromatography-mass spectrometry. Calibration problems