Sampling gaseous oxidation products of aromatic compounds in gas/particle separation systems |
| |
Authors: | Sax Mirjam Kalberer Markus Zenobi Renato |
| |
Institution: | Department of Chemistry and Applied Bioscience, ETH H?nggerberg, CH-8093 Zürich, Switzerland. |
| |
Abstract: | In this study we performed a direct comparison between two different ambient air samplers to characterize their performance in sampling oxidized gaseous organic compounds, known as oxidation products of aromatics. We investigated compounds with a variety of functional groups and vapor pressures. A polyurethane foam (PUF) adsorbent and an annular diffusion denuder sampler were operated along with particle filters. In both systems the sampling devices were liquid-extracted, followed by derivatization and analysis by GC-MS. The PUF system works very well for aromatic as well as non-aromatic compounds, whereas the denuder shows smaller collection efficiencies for highly volatile non-aromatic compounds. In addition, the sampling efficiencies in the PUF set-up are in good agreement with the calculated vapor pressures of the compounds and also the particle phase is not affected by most compounds. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|