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  • Title: [Tenax TA adsorption/thermal desorption/capillary gas chromatography for monitoring BTX in the ambient air].
    Author: Xu D, Liu C, Zhang A, Dong X, Han K, Wang G, Tang Z.
    Journal: Wei Sheng Yan Jiu; 2004 Jul; 33(4):425-7. PubMed ID: 15461265.
    Abstract:
    OBJECTIVE: A method for monitoring low concentration of benzene, toluene, p-xylene, o-xylene (BTX) in ambient air is set up. The optimum of desorption and analysis parameter is selected. METHODS: Tenax TA adsorption/thermal desorption/capillary gas chromatography is used. RESULTS: The relative standard deviation of benzene, toluene, p-xylene, o-xylene in ambient air are from 4.30% to 10.81%, which shows this method has good repeatability. The recoveries of BTX are more than 94%. The minimum detectable concentration to benzene, toluene, p-xylene, o-xylene is 0.09, 0.12, 0.23, 0.26 microg/m3 respectively. CONCLUSION: This method can be used to determinate low concentration of BTX in ambient air.
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