Submitted to: American Chemistry Society Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 8/22/2002
Publication Date: N/A
Technical Abstract: Particulate material of 10-micron and smaller nominal aerodynamic diameter is an important air pollutant. Our understanding of the amount of PM10 in Midwest agricultural settings is lacking to provide assessments of the impact of agriculture on air quality. Fine PM is frequently cited as the mechanism by which long-range transport of airborne pesticide residue occurs*. Detailed PM10 emissions data from midwestern rural settings in which intensive production agriculture is the dominant land-use are little studied and largely unknown. Laboratory methods require careful manipulation of minute sample masses. HPLC separation and identification by electrospray MS**n techniques complete the protocol. Using conventional high-volume sampling platforms, PM10 was collected on glass microfibre filter sheets from rural settings in central Iowa. Each was divided in half, one portion spiked with herbicide, and both subjected to extraction and MS**n determination. The UV and MS patterns of the spiked and unspiked samples are compared, identification criteria determined, and recovery statistics presented for each spiked sample. * Long Range Transport of Pesticides, D.A. Kurtz, Ed., Lewis Publishers, 1990.