Development of an analytical methodology for obtaining quantitative mass concentrations from LAAP-ToF-MS measurements

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dc.contributor.authorGemayel, Rachel
dc.contributor.authorTemime-Roussel, Brice
dc.contributor.authorHayeck, Nathalie
dc.contributor.authorGandolfo, Adrien
dc.contributor.authorHellebust, Stig
dc.contributor.authorGligorovski, Sasho
dc.contributor.authorWortham, Henri
dc.contributor.funderAgence Nationale de la Rechercheen
dc.date.accessioned2017-06-28T11:58:10Z
dc.date.available2017-06-28T11:58:10Z
dc.date.issued2017-06-21
dc.date.updated2017-06-28T11:47:08Z
dc.description.abstractLaser ablation aerosol particle-time of flight mass spectrometer (LAAP-ToF-MS) measures the size number of particles, and chemical composition of individual particles in real-time. LAAP-ToF-MS measurements of chemical composition are difficult to quantify, mostly because the instrument sensitivities to various chemical species in the multicomponent atmospheric aerosol particles are unknown. In this study, we investigate a field-based approach for quantitative measurements of ammonium, nitrate, sulfate, OC, and EC, in size-segregated atmospheric aerosols, by LAAP-ToF-MS using concurrent measurements from high-resolution time-of-flight aerosol mass spectrometer (HR-ToF-AMS), and multi-angle absorption photometer (MAAP). An optical particle counter (OPC) and a high-resolution nanoparticle sizer (scanning mobility particle sizer, or SMPS), were used to measure the particle size distributions of the particles in order to correct the number concentrations. The intercomparison reveals that the degree of agreement of the mass concentrations of each compound measured with LAAP-ToF-MS and HR-ToF-AMS/MAAP increases in the following order NH4+ <SO42- <NO3- <EC <OC <Cl- with r2 values in the range of 0.4–0.95 and linear regression slopes ranging between 0.62 and 1.2. The factors that affect the mass concentrations measured by LAAP-ToF-MS are also discussed in details. Yet, the matrix effect remains one of the strongest limiting factor to achieve an absolute quantification of the aerosol chemical composition. In the future we suggest the development of a methodology based on the calculation of the response factors generated by different types of particles, which could possibly resolve certain difficulties associated with the matrix effect.en
dc.description.sponsorshipAgence Nationale de la Recherche (French National Research Agency, LABEX SERENADE (no. ANR-11-LABX-0064) funded by the “Investisse- ments d’Avenir”, French Government program of the (ANR) through the A*Midex project (No. ANR-11-IDEX-0001–02), (ANR-10-EQPX-39-01))en
dc.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationGemayel, R., Temime-Roussel, B., Hayeck, N., Gandolfo, A., Hellebust, S., Gligorovski, S. and Wortham, H. (2017) 'Development of an analytical methodology for obtaining quantitative mass concentrations from LAAP-ToF-MS measurements', Talanta, 174, pp. 715-724. doi: 10.1016/j.talanta.2017.06.050en
dc.identifier.doi10.1016/j.talanta.2017.06.050
dc.identifier.endpage724
dc.identifier.issn0039-9140
dc.identifier.journaltitleTalantaen
dc.identifier.startpage715
dc.identifier.urihttps://hdl.handle.net/10468/4199
dc.identifier.volume174
dc.language.isoenen
dc.publisherElsevieren
dc.rights© 2017 Elsevier B.V. This manuscript version is made available under the CC-BY-NC-ND 4.0 licenseen
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subjectSingle aerosolen
dc.subjectLaser ablationen
dc.subjectLAAP-ToF-MSen
dc.subjectMatrix effecten
dc.subjectQuantificationen
dc.titleDevelopment of an analytical methodology for obtaining quantitative mass concentrations from LAAP-ToF-MS measurementsen
dc.typeArticle (peer-reviewed)en
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