Qualitative and quantitative assessment of UCM in PM2.5 of Bakersfield, CA.

Fine particulate matter (PM ₂.₅ ) was collected in Bakersfield, CA during the CalNex 2010 field experiment and was analyzed for primary organics using a gas chromatograph – mass spectrometer (GC-MS). Substantial presence of unresolved complex mixture (UCM) was observed in the collected PM ₂.₅ . To quantify the overlapping UCM peaks, a method was developed for the deconvolution (peak separation) of the UCM. This enabled unique quantification of each UCM peak. The developed method was tested on several runs of a standard reference material for urban dust, which yielded consistent values with a standard deviation of ~16%. The UCMs in the Bakersfield sample were quantified separately and qualitatively assessed for possible emission sources. The average spectrum from the UCM suggested the presence of alkanes, alkenes, and alkynes in the low-molecular weight UCM; and the presence of linear, branched, and cyclic alkanes in the high-molecular weight UCM. The method developed in the current study has the potential for application to a variety of environmental media.

Name thesis:degree_name

M.S.

Level thesis:degree_level

Masters

Grantor

Baylor University.

Year dc:date.issued

2013

Author dc:creator

• Nallathamby, Punith Dev.

Advisor dc:contributor.advisor

• Sheesley, Rebecca Jacobs.

• Unresolved complex mixture.
• Deconvolution.
• Peak separation.
• Quanitfication.

Statement dc:rights

• Baylor University works are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. Contact libraryquestions@baylor.edu for inquiries about permission.

Language dc:language.iso

en

Handle dc:identifier.uri

https://hdl.handle.net/2104/8913

OAI identifier oai:identifier

oai:baylor-ir.tdl.org:2104/8913