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- W2069642703 abstract "A cruise in the South Atlantic allowed the acquisition of a series of aerosol particle samples (high volume filtering) from Rio de Janeiro (Brazil) south to the Antarctic (Bransfield Strait) and back toward Punta Arenas (Chile). These samples were analyzed for the content and composition of solvent-soluble organic matter (range 55–5670 ng/m3) for a preliminary evaluation of the terrestrial components of this organic matter. Distributions of n-alkanes, n-alkanoic acids and n-alkanols were determined (gas chromatography/mass spectrometry) and compared with analogous information on biological and geological (e.g. petroleum) sources. A preliminary data correlation was also attempted by collection of composited local vegetation wax in one possible aerosol particle source region. The results show a petroleum derived component (unresolved hydrocarbon mixture and n-alkanes with no carbon number predominance) in most samples, notably evident remote from continental areas where the plant wax signature (straight-chain homologs C20) was less concentrated, as contrasted with the marine/microbial input (compounds < C20). A procedure for subtraction of the petroleum component in n-alkane traces, as well as analyses of oxygenated components, permitted resolution of some ambiguities and highlighted the biological fingerprint in all cases. In aerosols close to land, polycyclic biomarkers, indicative of fossil fuel (e.g. 17α(H)-hopanes, etc.) and/or biological input (e.g. cholesterol, etc.) could be recognized. Natural product biomarkers of terrestrial vegetation (e.g. amyrins, oleanolic and ursolic acids) showed a rapid depletion downwind from their source regions." @default.
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- W2069642703 date "1991-01-01" @default.
- W2069642703 modified "2023-09-27" @default.
- W2069642703 title "An assessment of terrestrial higher molecular weight lipid compounds in aerosol particulate matter over the south atlantic from about 30–70°S" @default.
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- W2069642703 doi "https://doi.org/10.1016/0045-6535(91)90196-k" @default.
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