Gas Flowing-Liquid Phase Enrichment of Organic Micro Pollutants from Atmosphere

Abstract

The enrichment effects of organic micro pollutants from atmosphere by gas flowing-liquid phase and compared with XAD resin enrichment method were investigated. For optimization of the enrichment conditions, the experiment variables such as gas flow rate, temperature and different solvents were investigated. The chemical composition of the polycyclic aromatic hydrocarbons was analyzed by GC-MS. The laboratory result shows the enrichment rate was 90 ± 10 % in a certain conditions (adsorbent of dichloromethane, cryohydrate bath and 3000 mL/min of carrier gas flow). To real sampling analysis, 8 polycyclic aromatic hydrocarbons were determined and satisfactory results were obtained comparing with XAD technology. The new method of gas flowing-liquid phase is simpler and economically cheaper, especially the after treatment method is simpler than XAD and enrichment efficiency is similar with the XAD technology.