Articles | Volume 13, issue 11
Atmos. Meas. Tech., 13, 6193–6213, 2020
https://doi.org/10.5194/amt-13-6193-2020
Atmos. Meas. Tech., 13, 6193–6213, 2020
https://doi.org/10.5194/amt-13-6193-2020

Research article 19 Nov 2020

Research article | 19 Nov 2020

Interferences with aerosol acidity quantification due to gas-phase ammonia uptake onto acidic sulfate filter samples

Benjamin A. Nault et al.

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Latest update: 15 Sep 2021
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Short summary
Collecting particulate matter, or aerosols, onto filters to be analyzed offline is a widely used method to investigate the mass concentration and chemical composition of the aerosol, especially the inorganic portion. Here, we show that acidic aerosol (sulfuric acid) collected onto filters and then exposed to high ammonia mixing ratios (from human emissions) will lead to biases in the ammonium collected onto filters, and the uptake of ammonia is rapid (< 10 s), which impacts the filter data.