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X-ray Diffraction Analysis of PM-10 Aerosols Extracted by Ultrasound

Published online by Cambridge University Press:  06 March 2019

B. L. Davis  and
H. Chen
B. L. Davis
Affiliation:
Engineering and Mining Experiment Station South Dakota School of Mines and Technology Rapid City, SD 57701-3995, U.S.A.
H. Chen
Affiliation:
Engineering and Mining Experiment Station South Dakota School of Mines and Technology Rapid City, SD 57701-3995, U.S.A.
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Extract

Determination of the species of compounds present in ambient aerosols has received increasing interest in recent years (Harrison and Pio, 1983; Davis, 1984; Davis and Maughan, 1984; Harrison and Sturges, 1984; Sturges et al, 1989; Possanzini et al, 1992; Havliek et al., 1993), but the U.S. Environmental Protection Agency's conversion to the PM10 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 μg cm-2 of 10-20 μm mean diameter particles, corresponding to 24-hour collections at ambient concentrations of 100 to 500 μg m-3 at 40 CFM flow rates, resulted in excellent diffraction patterns scanned directly from filter segments.

Type
II. Phase Analysis, Accuracy and Standards in Powder Diffraction
Information
Advances in X-Ray Analysis , Volume 38: Forty-third Annual Conference on Applications of X-ray Analysis , 1994 , pp. 91 - 97
Copyright
Copyright © International Centre for Diffraction Data 1994

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References

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