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- Hallquist, Mattias, 1969, et al.
(författare)
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Analysis of organic substances and trace elements in aerosol samples using Fourier transform infra-red and total reflection X-ray fluorescence methods, initial experiments
- 2004
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Ingår i: Spectrochimica Acta Part B-Atomic Spectroscopy. - : Elsevier BV. - 0584-8547. ; 59:8, s. 1193-1197
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Tidskriftsartikel (refereegranskat)abstract
- The ann of this study was to find a way to analyze trace elements as well as organic functional groups in the same aerosol sample. Size segregated aerosol particles were produced under laboratory conditions. The particles contained known amounts of inorganic and organic compounds and were analyzed using total reflection X-ray fluorescence (TXRF) and Fourier transform infra-red (FTIR) spectroscopy for their inorganic and organic content, respectively. A linear relation was obtained between the inorganic content from the TXRF analysis and specific organic functional groups evaluated by FTIR, although a transfer of the sample from quartz plates to zincselenide plates was necessary. The linear relation can be used for quantification of organic functional groups of other aerosol samples. Further improvements and possible applications of the combined techniques are discussed. (C) 2004 Elsevier B.V. All rights reserved.
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| 3. |
- Wagner, Annemarie, 1954, et al.
(författare)
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Biomonitoring of trace elements in Vietnamese freshwater mussels
- 2004
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Ingår i: Spectrochimica Acta Part B-Atomic Spectroscopy. - : Elsevier BV. - 0584-8547. ; 59:8, s. 1125-1132
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Tidskriftsartikel (refereegranskat)abstract
- The objective of the present study was to conduct a preliminary investigation of the pollution situation in the northern part of Vietnam with focus on trace elements including heavy metals. A freshwater bivalve species of the Unionidae family (Pletholophus swinhoei), abundant in this part of the country and frequently used for human consumption, was chosen as biomonitor. Ten specimens each were collected at two rural sites, Day Minh, approximately 40 km south of the capital Hanoi, and An Thin, situated approximately 11 km south of the Pha Lai power plant. The concentrations of 20 elements were measured using total reflection X-ray fluorescence and graphite furnace atomic absorption spectroscopy. Significant site-specific differences were found for the elements As, Ba, Be, Br, Cr, Fe, Mn, Ni, P and Sr. A comparison with other in situ biomonitoring studies using Unionidae bivalves showed that the concentrations of most elements were within the same order of magnitude, whereas heavy metal concentrations were distinctively low, suggesting the absence of major anthropogenic pollution sources in this area. The concentrations of Cd, Cr, Cu, Pb, Se and Zn were below the levels regarded as harmful according to the international standards for metals in mollusks compiled by the Food and Agricultural Organization of the United Nations. (C) 2004 Elsevier B.V. All rights reserved.
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