Environmental Engineering Reference
In-Depth Information
of species measured by different multicomponent methods. Filter and extract remnants should be
archived under refrigeration so that reanalyzes can be performed to resolve discrepancies.
7.5 SUMMARY AND CONCLUSIONS
A brief overview has been given of practical and cost-effective methods to analyze PM ilter
samples, pointing out some of the available methods and common pitfalls with reference to more
complete and alternative treatments. Different ilter media must be coupled with appropriate analy-
sis techniques, but more than one method can be applied to each sample or extract to obtain a
maximum amount of information. The methods described here are appropriate for both source and
receptor samples, and they quantify most of the marker species that allow source contributions to
be estimated by receptor modeling. Several of these components have been or are being implicated
in effects on human health and climate, and it is to be expected that there will be greater demand
for their measurement in the future. There are many opportunities to add additional methods for
a larger range of compounds, and this chapter should serve as a starting point, not an end, for
researchers desiring a more complete chemical characterization of ambient aerosols.
ACKNOWLEDGMENTS
Thanks are due to Steven Kohl, Dana Trimble, Ed Hackett, Brenda Cristani, Stephanie Salke, and
Jerome Robles of DRI's Environmental Analysis Facility (EAF) for their assistance in gathering
information for this chapter. Jo Gerrard assisted with assembling and Roger Kreidberg for editing
the chapter. Partial support for chapter preparation was provided by the Nazir and Mary Ansari
Foundation.
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