05 December 2023 1 10K Report

Hello,

we are doing XRF analysis of PM10 aerosol samples with the PX-375. However, we calibrate the instrument with the UCDavis reference material with PM2.5 elemental loading. Does anybody know if this is fine or how large is the uncertainty? Our PM2.5 to PM10 ratio varies between 0.5 and 0.9.

Thanks for your help.

Ivonne

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