On-line characterization of squalane aerosols using thermal desorption/tunable vacuum ultraviolet time-of-flight photoionization aerosol mass spectrometry

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081715%3A_____%2F25%3A00618924" target="_blank" >RIV/68081715:_____/25:00618924 - isvavai.cz</a>

Result on the web

<a href="https://hdl.handle.net/11104/0365716" target="_blank" >https://hdl.handle.net/11104/0365716</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.talanta.2025.128044" target="_blank" >10.1016/j.talanta.2025.128044</a>

Result language

angličtina

Original language name

On-line characterization of squalane aerosols using thermal desorption/tunable vacuum ultraviolet time-of-flight photoionization aerosol mass spectrometry

Original language description

effects on air pollution, global climate and human health. Therefore, analysis of chemical composition of OA in real-time is vital to understanding the formation and reaction mechanisms of organic aerosols. In this work,nvacuum ultraviolet (VUV) photoionization mass spectra of squalane aerosol, a good proxy for long chain hydrocarbons often detected in ambient OA, has been performed with a home-made thermal desorption/tunablenVUV photoionization aerosol time-of-flight mass spectrometer based on synchrotron radiation (SR). The dependence of photoionization mass spectra of squalane aerosols upon the vaporization temperature and ionizationnenergy were investigated in detail. The ionization energy (IE) of parent molecule (IEsq = 9.43 eV) and the corresponding appearance energies (AEs) of fragments ions were determined. It is shown that the choice of thenappropriate vaporization temperature is helpful for analysis of mass spectra of OA, and the measurement of the photoionization efficiency (PIE) curve is crucial to identifying the molecular chemical components of the fragmentnions. The dissociative photoionization of squalane aerosol was further studied theoretically with ab initio calculations at M062X level. The qualitative agreement between experimental and theoretical results on dissociativenphotoionization channels demonstrated that the mechanism of dissociative photoionization of squalane aerosol can be studied by controlling the vaporization temperature, which is important for chemical compositionnanalysis of OA in atmosphere. The findings in this work indicate the potential application of soft ionization aerosol mass spectrometry based on SR for characterization of atmospheric aerosols, especially OA.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10406 - Analytical chemistry

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

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

Name of the periodical

Talanta

ISSN

0039-9140

e-ISSN

1873-3573

Volume of the periodical

OCT

Issue of the periodical within the volume

293

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

10

Pages from-to

128044

UT code for WoS article

001482418300001

EID of the result in the Scopus database

2-s2.0-105002156276