X-ray diffraction analysis of PM-10 aerosols extracted by ultrasound

Journal Article · Sun Dec 31 04:00:00 EST 1995 · Advances in X-Ray Analysis

DOI:https://doi.org/10.1007/978-1-4615-1797-9_10· OSTI ID:369804

Davis, B L; Chen, Hong ^[1]

---

1. South Dakota School of Mines and Technology, Rapid City, SD (United States)

Determination of the species of compounds present in ambient aerosols has received increasing interest in recent years, but the U.S. Environmental Protection Agency`s conversion to the PM{sub 10} standard in 1987 has made quantitative analysis of fine particle aerosols more difficult because of the much smaller deposited mass on these filters, as well as the increased proportion of carbon-bearing material naturally present in the smaller diameter portion of the atmospheric aerosol size distribution. Under the old TSP (Total Suspended Particulate) collection protocol, filter loads of 400-2000 {mu}g cm{sup -2} of 10-20 {mu}m mean diameter particles, corresponding to 24-hour collections at ambient concentrations of 100 to 500 {mu}g m{sup -3} at 40 CFM flow rates, resulted in excellent diffraction patterns scanned directly from filter segments. Our sulfate study and quartz study illustrate typical results using these filters. At the other extreme only marginal information on the major components of ambient aerosols could be obtained from dichotomous filters with an upper cutpoint of 15 {mu}m and coarse/fine split at 2.5 {mu}m in the Houston aerosol study. 10 refs., 12 figs., 4 figs., 1 tab.

• Sponsoring Organization: USDOE
• OSTI ID: 369804
• Report Number(s): CONF-9408178--
• Journal Information: Advances in X-Ray Analysis, Journal Name: Advances in X-Ray Analysis Vol. 38; ISSN AXRAAA; ISSN 0376-0308
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
66 PHYSICS
AEROSOLS
AIR FILTERS
EVALUATION
QUANTITATIVE CHEMICAL ANALYSIS
X-RAY DIFFRACTION