Journal
ATMOSPHERIC RESEARCH
Volume 64, Issue 1-4, Pages 99-108Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/S0169-8095(02)00083-2
Keywords
organic matter; cloud chemistry; fog chemistry; solubility
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New stainless steel active fogwater collectors were designed and used in Davis (CA, USA) to collect fogwater for the speciation of organic matter. Organic compounds in fog samples were extracted by liquid-liquid extraction and analyzed by gas chromatography coupled to mass spectrometry. Numerous organic compounds, including various alkanes, polycyclic aromatic hydrocarbons (PAH) and alkanoic acids, have been identified in the fogwater samples. Higher molecular weight (MW) compounds are preferentially associated with an insoluble phase inside the fog drops, whereas lower molecular weight and more polar compounds are found predominantly in the dissolved phase. Concentrations in the dissolved phase were sometimes much higher than estimated by the compounds' aqueous solubilities. (C) 2002 Elsevier Science B.V. All rights reserved.
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