I analyzed soil and ash samples using ICP-MS for 28 metals, then I resuspended those samples to collect PM2.5 particles in a filter using a selective inlet inlet. My only issue that Fe and Al from my filters are in the millions of ug/g. I could not find any thing in the literature compare to this result. I understand the filters will have higher results because the weight of the sample analyzed was less comparing to the soil and ash samples, but how I can explain this number.

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