How can I calculate the enrichment factor of air particulate and metals?

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A. R. Karbassi

For metals you may use EF=(Cn/Bn)/(Cy/By)

Where Cn= the metal in your particulate; Bn=Fe or Al content of your particulate

Cy=the metal content in mean crust ; By=Fe or Al content of mean crust

Neeraj Rastogi

Enrichment Factor (EF) of any element X in aerosols can be calculated using the following formula:

EF of X = (X/Al)samples / (X/Al) in ucc

here, ucc stands for upper continental crust. For more details, you can read the attached paper.

Francis Olawale Abulude

Prof. Karbassi and Prof. Rastogi, many thanks. Your efforts were educative. Once again, thanks. I appreciate you two.