Self Absorption Corrections for X-Ray Fluorescence Analysis of Aerosols

U.S. National PM2.5Chemical Speciation Monitoring Networks—CSN and IMPROVE: Description of networks

“…Trace elements by EDXRF are mostly in the range from 25% to 40%. Light elements analyzed by EDXRF, such as sodium and aluminum, show relatively poor precision compared with heavier elements due to selfabsorption as described previously (see, e.g., Dzubay and Nelson, 1975;Berry et al, 1969).…”

“…Selfabsorption corrections for IMPROVE were applied to the EDXRF data prior to 2011 (Dzubay and Nelson, 1975;IMPROVE, 1997). A homogeneously distributed sample deposit on the filter is assumed, as well as incorporating particle-size and mass loading effects.…”

Methods for analyzing the concentration and speciation of major and trace elements in marine particles

“…An electron from an outer shell fills the hole, leading to 400 the emission of a fluorescent X-ray of well-defined energy (Figure 1) particles must be deposited as a uniform layer or film. Second, the thickness of the film must 421 be thin relative to both the penetration depth of the primary X-ray and the depth from which 422 the fluorescent X-rays emerge (Bertin, 1975;Criss, 1976;Dzubay and Nelson, 1975). ED-…”

A Critical Review

“…152 A particle size correction factor has also been tested for XRF analysis of filter-deposited particulate samples. 153 Self-absorption corrections for XRF analysis of ambient air samples can be made according to a developed procedure 154 and tabulated parameters for x-ray emission, absorption, and scattering can be used to predict the absolute line intensity and background scattering from pollution samples. 155 By application of energy dispersive XRF, the metals Fe, Zn, and Pb were found in urban air samples over a range of 10-1000 ng/m 3 .…”