Submitted to: American Chemical Society Abstracts
Publication Type: Abstract only
Publication Acceptance Date: 8/30/2001
Publication Date: N/A
Citation: Interpretive Summary:
Technical Abstract: Presently, production agriculture settings are not included in most air quality monitoring efforts sponsored either by the states or by the USEPA. High-volume air samplers are used to collect 10-micron and smaller particulate material from ambient air which is monitored at seven locations in central Iowa. These areas are chosen to represent fetch from ambient rural areas, fetch from intensively row cropped areas, and fetch from both buildings and lagoons associated with swine production facilities. PM10 samples are taken using a high-volume impinger at each location and FTIR spectra recorded directly from the glass fiber filters using photoacoustic sampling. All particulate matter spectra are background corrected against blank filter papers. Twenty spectra are used as the training sets for the discriminant analysis. Observation of Mahalanobis distance for each training set and observed spectral discrimination is presented. This method is chosen because it is very sensitive to inter-variable changes in the training set.