Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 7 of 7 for “"Water soluble organic carbon."”.
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Development of improved sampling and analysis methods for measuring organic, elemental, and water-soluble organic carbon in atmospheric aerosols and application to aerosol studies in Europe and tropical/equatorial and oceanic regions
… methods for a better discrimination between organic and elemental carbon (OC and EC) using the thermal-optical transmission (TOT) technique; (2) to deploy improved collection procedures for carbonaceous aerosols, whereby the sampling artifacts are better controlled or can be corrected for; …
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Spatial trends in surface-based carbonaceous aerosol measurements during DISCOVER-AQ in Houston, TX.
Carbonaceous aerosol (both fine particulate matter (PM₂.₅) and total suspended particulate (TSP)) were collected during NASA's DISCOVER-AQ (Deriving Information on Surface Conditions from Column and Vertically Resolved Observations Relevant to Air Quality) in Houston, TX during September 2013. Four …
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Characterization and source apportionment of ambient PM2.5 in Atlanta, Georgia: on-road emission, biomass burning and SOA impact
… including over one hundred of GC/MS-quantified organic compounds, organic carbon (OC), water-soluble organic carbon (WSOC), elemental carbon (EC), ionic species, and tens of trace metals. Day-night, seasonal and spatial variations of PM2.5 characterization were also studied. Contributions of …
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Method for investigating the hygroscopic and optical character of organic carbon in atmospheric aerosols
The hygroscopic and optical characteristics of organic carbon aerosols impact the radiative energy balance of the atmosphere, and therefore Earth’s climate. This thesis discusses the development of a method to fractionate organic carbon according to climate-relevant properties. Ion-exchange High …
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Physico-chemical characterisation of atmospheric aerosols in Tanzania, with emphasis on the carbonaceous aerosol components and on chemical mass closure
… unit sampler with sequential Nuclepore polycarbonate filters, providing coarse (2-10 µm diameter) and fine (<2 µm) size fractions, and PM2.5 and PM10 tandem filter samplers with pre-fired quartz fibre filters were deployed. Depending upon the season and the location, either 24-hour …
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Inorganic and organic speciation of atmospheric aerosols by ion chromatography and aerosol chemical mass closure
… objectives: (1) to measure major and minor inorganic ionic constituents by ion chromatography (IC) in atmospheric aerosol samples; (2) to determine low molecular weight dicarboxylic acids (DCAs) and methanesulphonate (MSA-) by IC and to assess their contribution to the water-soluble organic …
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Measurement of the cellular oxidative potential and cytotoxicity of ambient pm2.5 – an assessment of toxic pm2.5 chemical components and their sources in the midwest US
… was measured by three acellular OP assays. The carbonaceous components and concentration of metals in the water-soluble PM2.5 were also determined. Correlation analysis among the PM2.5 OP, cytotoxicity and chemical composition was conducted. All three endpoints in the OP assays correlated …