I am carrying out samping using GRIMM-WRAS for particle count and mass concentration.

I wanted to differentiate particle based on Nucleation(Aitken mode) 1µm, but the instrument design lags in 1µm size, In this case which value I need to select, either 0.1µm to 0.943µm or 0.1µm to 1.112 µm as cut off diameter?

Thanks

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