期刊名称：African Journal of Environmental Science and Technology
电子版ISSN：1996-0786
出版年度：2010
卷号：4
期号：11
页码：718-728
DOI：10.5897/AJEST10.173
语种：English
出版社：Academic Journals
摘要：In this study, the atmospheric particulate matter (PM) was sampled using the tapered element oscillating microbalance, and the inductively coupled plasma mass spectroscopy (ICP-MS) and scanning electron microscopy coupled with energy dispersive spectrometry (SEM/EDS) were used for determination of elemental composition of the PM. The efficiency and relevance of thesampling method,ICP-MS and SEM/EDS in toxic metal analysis were assessed.Low flow rate yielded high accumulated mass of particulate matter. The efficiency of the filter media used was found to be, in decreasing order: teflon-coated glass fiber, ringed-teflon and quartz filters. The main elements identified from the SEM/EDS on ringed-teflon filters were Si, Fe, Mg, K, Na, C, S, F and O, and for ICP-MS, the following main elements were identified: Fe, Al, Ca, Mg, K, Na, Cr, Ni, Pb, Cu, Zn and Mn.The ICP-MS proved to be more relevant for the analysis of the toxic metals of interest. The standard deviations obtained from this method were less than 30% for most of the metals identified. The method detection limit was also low (0.2 to 1 μg/L) for most metals, and 50% and less standard deviation to mean ratios were obtained for Ni and Pb.
关键词：Toxic metals; inductively coupled plasma mass spectroscopy; scanning electron microscopy coupled with energy dispersive spectrometry; particulate matter; tapered element oscillating microbalance
