(App. Table II-9a) Enrichment factors relative to the Earth's crust for chemical elements in aerosols collected on Whatman-41 filters in the Kara Sea in September 1993
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EF = (El_sample/Sc_sample) / (El_crust/Sc_crust)
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2006-01-01

EF = (El_sample/Sc_sample) / (El_crust/Sc_crust)