Online determination of ammonium in PM2.5 aerosol by a continual aerosol sampler and parallel size-segregated determination of ammonium and anions using a cascade impactor

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26310%2F26%3A0201763" target="_blank" >RIV/00216305:26310/26:0201763 - isvavai.cz</a>

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S1309104226000474?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1309104226000474?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.apr.2026.102931" target="_blank" >10.1016/j.apr.2026.102931</a>

Result language

angličtina

Original language name

Online determination of ammonium in PM2.5 aerosol by a continual aerosol sampler and parallel size-segregated determination of ammonium and anions using a cascade impactor

Original language description

Ammonium in urban fine aerosol (Particulate Matter, [PM2.5]) was analysed in parallel using two different methods. The first method, a continuous Condensation-Growth Unit − Aerosol Counterflow Two-Jets Unit sampler combined with a fluorescence detector (FLD), allowed the ultrasensitive (limit of detection = 1.04 ng m−3, 3 S/N) and fast (1 s time resolution) online determination of NH4+, while the second method was based on a sampling of aerosols on a high-flow cascade impactor (HFI) with 7 size fractions. The aerosols collected by the HFI were analysed offline for ammonium using the FLD and for seven water-soluble anions using ion chromatography. Comparison of the results from both methods allowed quantification of NH4+ losses of semi-volatile NH4+ salts in aerosols collected on the HFI. The measurement of mass size distribution was used to distinguish the sources of ions in the fine PM. Nitrate and sulphate were the most abundant anions, accounting for 80.4 % and 76.1 % of total ion concentration and 7.93 % and 10.2 % of aerosol mass during summer and winter campaigns, respectively. Sampling of atmospheric aerosol during 2-week campaigns in summer 2021 and winter 2022 provided seasonal variations of analysed ions in urban PM2.5 aerosols in Brno, Czech Republic.

Czech name

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Czech description

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Type

J_SC - Article in a specialist periodical, which is included in the SCOPUS database

CEP classification

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OECD FORD branch

10500 - Earth and related environmental sciences

Project

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Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2026

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Atmospheric Pollution Research

ISSN

1309-1042

e-ISSN

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Volume of the periodical

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Issue of the periodical within the volume

102931

Country of publishing house

TR - TURKEY

Number of pages

8

Pages from-to

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UT code for WoS article

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EID of the result in the Scopus database

2-s2.0-105029046047