| 摘要: | 摘要： The feasibility of employing the mesoporous silicate MCM-41 as a sorbent for sampling ambient polycyclic aromatic hydrocarbons (PAHs) was investigated. The performance of MCM-41 as a sorbent for PAHs was assessed by using standard mixtures and field sampling of seven target species: naphthalene, acenaphthylene, acenaphthene, fluorene, phenanthrene, fluoranthene, and pyrene. Quality assurance measurements, such as analytical precision, linearity, and recovery, were determined viaaddition of external, surrogate, and internal standards. To test the field applicability of MCM-41, the exhaust of motorcycle and diesel bus were sampled as the sources of PAHs. The performance of MCM-41, which was evaluated against that of commercially available sorbents XAD-2 and XAD-16, showed comparable results. In the case of four-stroke motorcycle exhaust, both MCM-41 and XAD-2 exhibited similar sorption characteristics for the seven target PAHs at concentrations of 15 to 2.8 10 super(5) ng m super(-3) in the exhaust. Diesel bus exhaust sampled through a dynamometer was examined using commercial XAD-16 as the reference. The concentrations of naphthalene, acenaphthylene, acenaphthene, fluorene, and phenanthrene were found to be in the range of 10 to 2.5 10 super(4) ng m super(-3). Other than naphthalene, which had a low recovery (20-30%) because of its high volatility, the recoveries of MCM-41 for most target PAHs show a trend similar to those of the XAD materials in the study, demonstrating the high applicability of MCM-41 as an enrichment medium for ambient PAHs.
出版日期： 2013-01-01
出處： Analytical methods, 2013-01, Vol.5 (23), p.6874-6880
資源來源： Royal Society of Chemistry
識別號： ISSN: 1759-9660
識別號： ISSN: 1759-9679
識別號： EISSN: 1759-9679
識別號： DOI: 10.1039/c3ay41172a |
