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- W2287905946 abstract "Organic species in ambient particulate matter may have human health effects. They may also be involved in atmospheric cloud processes. The purpose of this study is chemical characterization of polar, as well as non-polar, organics that were collected from airborne particles in Sao Paulo, Brazil. Relatively little work has been done to date to characterize polar organics because of the analytical difficulties associated with complex mixtures of polar organic compounds. Non-polar and polar organic extracts of airborne particulate matter have been fractionated using cyanopropyl-bonded silica. Before fractionation, the particles had been treated sequentially with dichloromethane and acetone to yield the non-polar and polar extracts, respectively. The fractions have been analyzed using reversed-phase high performance liquid chromatography with ultraviolet absorption, infrared spectroscopy, ion chromatography and elemental analysis. The non-polar and polar organic fractions contain polyfunctional species, but the polar fractions are more highly oxygenated and are more likely to be hydrophilic." @default.
- W2287905946 created "2016-06-24" @default.
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- W2287905946 date "1995-12-31" @default.
- W2287905946 modified "2023-09-23" @default.
- W2287905946 title "Fractionation and chemical characterization of organic material in airborne particles from Sao Paulo, Brazil" @default.
- W2287905946 hasPublicationYear "1995" @default.
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