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In this study, we performed a highly time-resolved chemical characterization of non-refractory submicron particles (NR-PM1) in Beijing by using an Aerodyne high-resolution time-of-flight aerosol mass spectrometer (HR–ToF–AMS). The results showed the average NR-PM1 mass concentration to be 56.4±58.0μg/m3, with a peak at 307.4μg/m3. Due to the high frequency of biomass burning in autumn, submicron particles...
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