Articles | Volume 15, issue 9
Atmos. Meas. Tech., 15, 2667–2684, 2022
https://doi.org/10.5194/amt-15-2667-2022
Atmos. Meas. Tech., 15, 2667–2684, 2022
https://doi.org/10.5194/amt-15-2667-2022
Research article
03 May 2022
Research article | 03 May 2022

Inter-comparison of online and offline methods for measuring ambient heavy and trace elements and water-soluble inorganic ions (NO3, SO42−, NH4+, and Cl) in PM2.5 over a heavily polluted megacity, Delhi

Himadri Sekhar Bhowmik et al.

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Short summary
This study presents comparisons between online and offline measurements of both refractory and non-refractory aerosol. This study shows differences between the measurements, related to either the limitations of the instrument (e.g., aerosol mass spectrometer only observing non-refractory aerosol) or known interferences with the technique (e.g., volatilization or reactions). The findings highlight the measurement methods' accuracy and imply the particular type of measurements needed.