Analysis of winter time aerosols at Del Paso Manor for organic chemicals

Project: Research project

Project Details

Description

Analysis of winter time aerosols at Del Paso Manor for organic chemicals Analysis of winter time aerosols at Del Paso Manor for organic chemicals The Del Paso Manor air monitoring site is the site that violates particulate air quality standards more often than any other site in the Sacramento Metropolitan Air Quality Management District. The aerosol concentrations (and violations) are the highest in winter due to frequent stagnation events and potential seasonal sources such as residential wood combustion. Therefore, it is important to understand the sources of the aerosols at this site to implement effective management strategies to reduce the violations at this site (e.g. restrictions on wood burning). To understand the aerosols at this site, size-resolved particulate samples, including the important ultra-fine fraction, were collected in the winter of 2010 by the DELTA group. Two samplers were deployed at the Del Paso Manor site to collect samples for organic analysis. Each sampler collected aerosols in 8 size modes by impaction onto baked aluminum foil and then it collected the ultra-fine aerosols on a PTFE after filter. Therefore, each sampler yielded 9 samples. This research only involves the analysis of the samples from one of the samplers while the second set of samples is saved in reserve for backup and QAQC purposes. Three aluminum blanks and 2 filter blanks were also collected to test for contamination during sample handling and processing. The blanks are also used to set the minimum detection limits. The samples will be analyzed for a series of organic compounds that are tracers of known aerosol sources. In particular, the samples will be analyzed for: coronene (gasoline vehicle tracer), levoglucosan (wood smoke stracer), dehydroabietic acid (pine wood smoke tracer), glucose (primary biological material) and cholesterol (cooking source). In addition to these well known tracer compounds, a series of 26 PAHs, 31 organic acids (mostly alkanoic acids) and 15 sugars will also be determined. Analysis of 20 alkanes and 5 phthalate esters will be attempted, but these chemicals are often not useable for trace organic analysis due to contamination from machine oils used in the air samplers. The results from the chemical analysis will transferred to the DELTA Group to be integrated into their elemental and mass analysis from their samples. The results will appear in the final report prepared to the DELTA group for Breathe California.
StatusFinished
Effective start/end date6/1/1012/31/10

Funding

  • Breathe California of Sacrament-Emigrant Trails: $10,000.00

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