Objective To improve the capabilities of rapid quantitative detection for benzene homologues in air.
Methods Adsorption analysis and evaluation of various parameters of solid-phase micro-extraction(SPME)technology on the extraction of multi-component standard benzene homologue gas (BETXs) standard gas were investigated. The detection methods and mutual competitive adsorption behaviour of benzene homologues on SPME coat were studied.
Results The most efficient SPME coat is CAR/PDMS. Benzene homlogue with higher boiling point posses higher competitiveness in the extraction of the coat. Adsorption of standard gas in range of 2-42.5 mg/m3 increases with the concentration linearly.
Conclusion Application of SPME technology for determining benzene homologues in air was influenced by many factors. Competitive adsorption among components in BETXs on the surface of extraction head makes more or less difficult for quantitative determination.
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