Aerosol analysis for the regional air pollution study. Final report

摘要: Beginning in May 1975 and continuing through April 1977, a total of 35,000 individual ambient aerosol samples were collected at ten selected sampling sites St. Louis, as part the Regional Air Pollution Study (RAPS). The consisted membrane filters on which coarse fine particulate fractions separately using automatic dichotomous air samplers. returned to Lawrence Berkeley Laboratory (LBL) for analysis following collection field sites. Mass concentrations determined by beta-particle attenuation method. This required measurement tare weights each filter before being sent subsequent their return. Elemental was performed 27 elements energy dispersive X-ray fluorescence analysis. Optimal sensitivities obtained pulsed excitation, automated data handling employed facilitate sets. report discusses detail procedures used analysis, processing validation.