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Ultrafine particles (diameter D$_p$ < 100 nm) typically comprise the largest fraction of the total number concentration, however, their chemical characterization is difficult because of their low mass. Using an extractive electrospray time-of-flight mass spectrometer (EESI-TOF), we characterize the molecular composition of freshly nucleated particles from naphthalene and b-caryophyllene oxidation products at the CLOUD chamber at CERN. We perform a detailed intercomparison of the organic aerosol chemical composition measured by the EESI-TOF and an iodide adduct chemical ionization mass spectrometer equipped with a filter inlet for gases and aerosols (FIGAERO-I-CIMS). We also use an aerosol growth model based on the condensation of organic vapors to show that the chemical composition measured by the EESI-TOF is consistent with the expected condensed oxidation products. This agreement could be further improved by constraining the EESI-TOF compound-specific sensitivity or considering condensed-phase processes. Our results show that the EESI-TOF can obtain the chemical composition of particles as small as 20 nm in diameter with mass loadings as low as hundreds of ng m$^{-3}$ in real time. This was until now difficult to achieve, as other online instruments are often limited by size cutoffs, ionization/thermal fragmentation and/or semicontinuous sampling. Using real-time simultaneous gas- and particle-phase data, we discuss the condensation of naphthalene oxidation products on a molecular level. Surdu, Mihnea; Pospisilova, Veronika; Xiao, Mao; Wang, Mingyi; Mentler, Bernhard; Simon, Mario; Stolzenburg, Dominik; Hoyle, Christopher R; Bell, David M; Lee, Chuan Ping; Lamkaddam, Houssni; Lopez-Hilfiker, Felipe; Ahonen, Lauri R; Amorim, Antonio; Baccarini, Andrea; Chen, Dexian; Dada, Lubna; Duplissy, Jonathan; Finkenzeller, Henning; He, Xu-Cheng; Hofbauer, Victoria; Kim, Changhyuk; Kürten, Andreas; Kvashnin, Aleksandr; Lehtipalo, Katrianne; Makhmutov, Vladimir; Molteni, Ugo; Nie, Wei; Onnela, Antti; Petäjä, Tuukka; Quéléver, Lauriane L J; Tauber, Christian; Tomé, António; Wagner, Robert; Yan, Chao; Prevot, Andre S H; Dommen, Josef; Donahue, Neil M; Hansel, Armin; Curtius, Joachim; Winkler, Paul M; Kulmala, Markku; Volkamer, Rainer; Flagan, Richard C; Kirkby, Jasper; Worsnop, Douglas R; Slowik, Jay G; Wang, Dongyu S; Baltensperger, Urs; el Haddad, Imad el" /> <meta name="keywords" content="CERN Document Server, WebSearch, CLOUD Papers" /> <script type="text/javascript" src="https://cds.cern.ch/js/jquery.min.js"></script>  <link rel="stylesheet" href="https://cds.cern.ch/img/webnews.css" type="text/css" />  <script type="text/javascript" src="https://cds.cern.ch/js/webnews.js?v=20131009"></script> <meta property="fb:app_id" content="137353533001720"/> <script type="text/x-mathjax-config"> MathJax.Hub.Config({ tex2jax: {inlineMath: [['$','$']], processEscapes: true}, showProcessingMessages: false, messageStyle: "none" }); </script> <script src="/MathJax/MathJax.js?config=TeX-AMS_CHTML" type="text/javascript"> </script>  <meta content="submitter : Molecular characterization of ultrafine particles using extractive electrospray time-of-flight mass spectrometry" name="citation_title" /> <meta content="Surdu, Mihnea" name="citation_author" /> <meta content="Kvashnin, Aleksandr" name="citation_author" /> <meta content="Lee, Chuan Ping" name="citation_author" /> <meta content="Donahue, Neil M" name="citation_author" /> <meta content="Petäjä, Tuukka" name="citation_author" /> <meta content="Chen, Dexian" name="citation_author" /> <meta content="Dommen, Josef" name="citation_author" /> <meta content="Onnela, Antti" name="citation_author" /> <meta content="Hofbauer, Victoria" name="citation_author" /> <meta content="Finkenzeller, Henning" name="citation_author" /> <meta content="Yan, Chao" name="citation_author" /> <meta content="Worsnop, Douglas R" name="citation_author" /> <meta content="Winkler, Paul M" name="citation_author" /> <meta content="Lehtipalo, Katrianne" name="citation_author" /> <meta content="Duplissy, Jonathan" name="citation_author" /> <meta content="Curtius, Joachim" name="citation_author" /> <meta content="Prevot, Andre S H" name="citation_author" /> <meta content="Xiao, Mao" name="citation_author" /> <meta content="Baltensperger, Urs" name="citation_author" /> <meta content="Dada, Lubna" name="citation_author" /> <meta content="Lopez-Hilfiker, Felipe" name="citation_author" /> <meta content="Bell, David M" name="citation_author" /> <meta content="Molteni, Ugo" name="citation_author" /> <meta content="el Haddad, Imad el" name="citation_author" /> <meta content="Hansel, Armin" name="citation_author" /> <meta content="Wang, Mingyi" name="citation_author" /> <meta content="Simon, Mario" name="citation_author" /> <meta content="Nie, Wei" name="citation_author" /> <meta content="Lamkaddam, Houssni" name="citation_author" /> <meta content="Baccarini, Andrea" name="citation_author" /> <meta content="Slowik, Jay G" name="citation_author" /> <meta content="Wagner, Robert" name="citation_author" /> <meta content="Tomé, António" name="citation_author" /> <meta content="Flagan, Richard C" name="citation_author" /> <meta content="Tauber, Christian" name="citation_author" /> <meta content="Amorim, Antonio" name="citation_author" /> <meta content="Ahonen, Lauri R" name="citation_author" /> <meta content="Wang, Dongyu S" name="citation_author" /> <meta content="Makhmutov, Vladimir" name="citation_author" /> <meta content="Mentler, Bernhard" name="citation_author" /> <meta content="Kirkby, Jasper" name="citation_author" /> <meta content="Hoyle, Christopher R" name="citation_author" /> <meta content="Quéléver, Lauriane L J" name="citation_author" /> <meta content="He, Xu-Cheng" name="citation_author" /> <meta content="Pospisilova, Veronika" name="citation_author" /> <meta content="Volkamer, Rainer" name="citation_author" /> <meta content="Kim, Changhyuk" name="citation_author" /> <meta content="Kulmala, Markku" name="citation_author" /> <meta content="Kürten, Andreas" name="citation_author" /> <meta content="Stolzenburg, Dominik" name="citation_author" /> <meta content="10.1039/d1ea00050k" name="citation_doi" /> <meta content="Environmental Science: Atmospheres" name="citation_journal_title" /> <meta content="1" name="citation_volume" /> <meta content="434-448" name="citation_firstpage" /> <meta content="2021" name="citation_publication_date" /> <meta name="citation_online_date" content="2022/11/30"> <meta content="10.1039/d1ea00050k" name="citation_doi" /> <meta name="citation_pdf_url" content="https://cds.cern.ch/record/2842555/files/d1ea00050k.pdf" />  <meta content="submitter" property="og:title" /> <meta content="Molecular characterization of ultrafine particles using extractive electrospray time-of-flight mass spectrometry" property="og:title" /> <meta content="website" property="og:type" /> <meta content="https://cds.cern.ch/record/2842555" property="og:url" /> <meta content="CERN Document Server" property="og:site_name" /> <meta content="submitter" property="og:description" /> <meta content="Aerosol particles negatively affect human health while also having climatic relevance due to, for example, their ability to act as cloud condensation nuclei. Ultrafine particles (diameter D$_p$ &lt; 100 nm) typically comprise the largest fraction of the total number concentration, however, their chemical characterization is difficult because of their low mass. Using an extractive electrospray time-of-flight mass spectrometer (EESI-TOF), we characterize the molecular composition of freshly nucleated particles from naphthalene and b-caryophyllene oxidation products at the CLOUD chamber at CERN. We perform a detailed intercomparison of the organic aerosol chemical composition measured by the EESI-TOF and an iodide adduct chemical ionization mass spectrometer equipped with a filter inlet for gases and aerosols (FIGAERO-I-CIMS). We also use an aerosol growth model based on the condensation of organic vapors to show that the chemical composition measured by the EESI-TOF is consistent with the expected condensed oxidation products. This agreement could be further improved by constraining the EESI-TOF compound-specific sensitivity or considering condensed-phase processes. Our results show that the EESI-TOF can obtain the chemical composition of particles as small as 20 nm in diameter with mass loadings as low as hundreds of ng m$^{-3}$ in real time. This was until now difficult to achieve, as other online instruments are often limited by size cutoffs, ionization/thermal fragmentation and/or semicontinuous sampling. Using real-time simultaneous gas- and particle-phase data, we discuss the condensation of naphthalene oxidation products on a molecular level." property="og:description" />  <meta content="summary" name="twitter:card" /> <style></style> </head> <body class="CLOUD32Papers search" lang="it">  <div id="cern-toolbar"> <h1><a href="http://cern.ch" title="CERN">CERN <span>Accelerating science</span></a></h1> <ul> <li class="cern-accountlinks"><a class="cern-account" href="https://cds.cern.ch/youraccount/login?ln=it&referer=https%3A//cds.cern.ch/record/2842555%3Fln%3Dit" title="Sign in to your CERN account">Sign in</a></li> <li><a class="cern-directory" href="http://cern.ch/directory" title="Search CERN resources and browse the directory">Directory</a></li> </ul> </div>   <div role="banner" class="clearfix" id="header"> <div class="header-inner inner"> <hgroup class="clearfix"> <h2 id="site-name"> <a rel="home" title="Home" href="/"><span>CERN Document Server</span></a> </h2> <h3 id="site-slogan">Access articles, reports and multimedia content in HEP</h3> </hgroup> <div role="navigation" id="main-navigation" class="cdsmenu"> <h2 class="element-invisible">Main menu</h2><ul class="links inline clearfix"> <li class="menu-386 first active-trail"><a class="active-trail" href="https://cds.cern.ch/?ln=it">Cerca</a></li> <li class="menu-444 "><a class="" title="" href="https://cds.cern.ch/submit?ln=it">Sottometti</a></li> <li class="menu-426 "><a class="" href="https://cds.cern.ch/help/?ln=it">Aiuto</a></li> <li class="leaf hassubcdsmenu"> <a hreflang="en" class="header" href="https://cds.cern.ch/youraccount/display?ln=it">Personalizza</a> <ul class="subsubcdsmenu"><li><a href="https://cds.cern.ch/youralerts/list?ln=it">I tuoi avvisi</a></li><li><a href="https://cds.cern.ch/yourbaskets/display?ln=it">I tuoi cestini</a></li><li><a href="https://cds.cern.ch/yourcomments?ln=it">Your comments</a></li><li><a href="https://cds.cern.ch/youralerts/display?ln=it">Le tue ricerche</a></li></ul></li> </ul> </div> </div> </div>  <table class="navtrailbox"> <tr> <td class="navtrailboxbody"> <a href="/?ln=it" class="navtrail">Pagina principale</a> > <a href="/collection/CERN%20Experiments?ln=it" class="navtrail">CERN Experiments</a> > <a href="/collection/PS%20Experiments?ln=it" class="navtrail">PS Experiments</a> > <a href="/collection/CLOUD?ln=it" class="navtrail">CLOUD</a> > <a href="/collection/CLOUD%20Papers?ln=it" class="navtrail">CLOUD Papers</a> > Molecular characterization of ultrafine particles using extractive electrospray time-of-flight mass spectrometry </td> </tr> </table> </div> <div class="pagebody"><div class="pagebodystripemiddle"> <div class="detailedrecordbox"> <div class="detailedrecordtabs"> <div> <ul class="detailedrecordtabs"><li class="on first"><a href="/record/2842555/?ln=it">Informazioni </a></li><li class=""><a href="/record/2842555/references?ln=it">Riferimenti </a></li><li class=""><a href="/record/2842555/citations?ln=it">Citazioni (0) </a></li><li class=""><a href="/record/2842555/keywords?ln=it">Parole chiave </a></li><li class=""><a href="/record/2842555/comments?ln=it">Discussioni (0) </a></li><li class=""><a href="/record/2842555/usage?ln=it">Statistiche di utilizzo </a></li><li class=""><a href="/record/2842555/files?ln=it">File </a></li><li class="disabled"><a>Grafico </a></li><li class=""><a href="/record/2842555/holdings?ln=it">Copie </a></li><li class=""><a href="/record/2842555/linkbacks?ln=it">Linkbacks </a></li></ul> <div id="tabsSpacer" style="clear:both;height:0px"> </div></div> </div> <div class="detailedrecordboxcontent"> <div class="top-left-folded"></div> <div class="top-right-folded"></div> <div class="inside">  <abbr class="unapi-id" title="2842555"></abbr> <style type="text/css">  </style> <table class="formatRecordTableFullWidth" > <tr> <td class="formatRecordHeader" style="background-image: url('https://cds.cern.ch/img/journals.jpg');" colspan="2">  Article </td> </tr> <script type="text/javascript"> $( document ).ready(function() { $('.showAuthor').on('click', function() { var author = '<p>' + $(this).data('name') + '</p>'; 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if (more.style.display=='none'){ more.style.display = ''; extension.style.display = 'none'; link.innerHTML = "Nascondi" } else { more.style.display = 'none'; extension.style.display = ''; link.innerHTML = "Visualizza tutti i 50 autori" } link.style.color = "rgb(204,0,0);" } function set_up(){ var extension = document.getElementById('extension'); extension.innerHTML = ""; toggle_authors_visibility(); } </script> <a name="show_hide" /><a href="https://cds.cern.ch/search?f=author&p=Surdu%2C%20Mihnea&ln=it">Surdu, Mihnea</a> (PSI, Villigen) ; <a href="https://cds.cern.ch/search?f=author&p=Pospisilova%2C%20Veronika&ln=it">Pospisilova, Veronika</a> (PSI, Villigen) ; <a href="https://cds.cern.ch/search?f=author&p=Xiao%2C%20Mao&ln=it">Xiao, Mao</a> (PSI, Villigen) ; <a href="https://cds.cern.ch/search?f=author&p=Wang%2C%20Mingyi&ln=it">Wang, Mingyi</a> (Carnegie Mellon U.) ; <a href="https://cds.cern.ch/search?f=author&p=Mentler%2C%20Bernhard&ln=it">Mentler, Bernhard</a> (Innsbruck U.) ; <a href="https://cds.cern.ch/search?f=author&p=Simon%2C%20Mario&ln=it">Simon, Mario</a> (Frankfurt U., FIAS ; Frankfurt U.) ; <a href="https://cds.cern.ch/search?f=author&p=Stolzenburg%2C%20Dominik&ln=it">Stolzenburg, Dominik</a> (Vienna U., Dept. Math. ; Helsinki U.) ; <a href="https://cds.cern.ch/search?f=author&p=Hoyle%2C%20Christopher%20R&ln=it">Hoyle, Christopher R</a> (PSI, Villigen ; Zurich, ETH) ; <a href="https://cds.cern.ch/search?f=author&p=Bell%2C%20David%20M&ln=it">Bell, David M</a> (PSI, Villigen) ; <a href="https://cds.cern.ch/search?f=author&p=Lee%2C%20Chuan%20Ping&ln=it">Lee, Chuan Ping</a> (PSI, Villigen)<span id="more" style=""> ; <a href="https://cds.cern.ch/search?f=author&p=Lamkaddam%2C%20Houssni&ln=it">Lamkaddam, Houssni</a> (PSI, Villigen) ; <a href="https://cds.cern.ch/search?f=author&p=Lopez-Hilfiker%2C%20Felipe&ln=it">Lopez-Hilfiker, Felipe</a> (PSI, Villigen) ; <a href="https://cds.cern.ch/search?f=author&p=Ahonen%2C%20Lauri%20R&ln=it">Ahonen, Lauri R</a> (Helsinki U.) ; <a href="https://cds.cern.ch/search?f=author&p=Amorim%2C%20Antonio&ln=it">Amorim, Antonio</a> (Lisbon, CENTRA) ; <a href="https://cds.cern.ch/search?f=author&p=Baccarini%2C%20Andrea&ln=it">Baccarini, Andrea</a> (PSI, Villigen ; Ecole Polytechnique, Lausanne) ; <a href="https://cds.cern.ch/search?f=author&p=Chen%2C%20Dexian&ln=it">Chen, Dexian</a> (Carnegie Mellon U.) ; <a href="https://cds.cern.ch/search?f=author&p=Dada%2C%20Lubna&ln=it">Dada, Lubna</a> (PSI, Villigen ; Helsinki U.) ; <a href="https://cds.cern.ch/search?f=author&p=Duplissy%2C%20Jonathan&ln=it">Duplissy, Jonathan</a> (Helsinki U. ; Helsinki Inst. of Phys.) ; <a href="https://cds.cern.ch/search?f=author&p=Finkenzeller%2C%20Henning&ln=it">Finkenzeller, Henning</a> (Colorado U.) ; <a href="https://cds.cern.ch/search?f=author&p=He%2C%20Xu-Cheng&ln=it">He, Xu-Cheng</a> (Helsinki U.) ; <a href="https://cds.cern.ch/search?f=author&p=Hofbauer%2C%20Victoria&ln=it">Hofbauer, Victoria</a> (Carnegie Mellon U.) ; <a href="https://cds.cern.ch/search?f=author&p=Kim%2C%20Changhyuk&ln=it">Kim, Changhyuk</a> (Caltech ; Pusan Natl. U.) ; <a href="https://cds.cern.ch/search?f=author&p=K%C3%BCrten%2C%20Andreas&ln=it">Kürten, Andreas</a> (Frankfurt U., FIAS ; Frankfurt U.) ; <a href="https://cds.cern.ch/search?f=author&p=Kvashnin%2C%20Aleksandr&ln=it">Kvashnin, Aleksandr</a> (Lebedev Inst.) ; <a href="https://cds.cern.ch/search?f=author&p=Lehtipalo%2C%20Katrianne&ln=it">Lehtipalo, Katrianne</a> (Helsinki U. ; Helsinki Inst. of Phys.) ; <a href="https://cds.cern.ch/search?f=author&p=Makhmutov%2C%20Vladimir&ln=it">Makhmutov, Vladimir</a> (Lebedev Inst.) ; <a href="https://cds.cern.ch/search?f=author&p=Molteni%2C%20Ugo&ln=it">Molteni, Ugo</a> (PSI, Villigen) ; <a href="https://cds.cern.ch/search?f=author&p=Nie%2C%20Wei&ln=it">Nie, Wei</a> (Nanjing U. (main)) ; <a href="https://cds.cern.ch/search?f=author&p=Onnela%2C%20Antti&ln=it">Onnela, Antti</a> (CERN) ; <a href="https://cds.cern.ch/search?f=author&p=Pet%C3%A4j%C3%A4%2C%20Tuukka&ln=it">Petäjä, Tuukka</a> (Helsinki U.) ; <a href="https://cds.cern.ch/search?f=author&p=Qu%C3%A9l%C3%A9ver%2C%20Lauriane%20L%20J&ln=it">Quéléver, Lauriane L J</a> (Helsinki U.) ; <a href="https://cds.cern.ch/search?f=author&p=Tauber%2C%20Christian&ln=it">Tauber, Christian</a> (Vienna U., Dept. Math.) ; <a href="https://cds.cern.ch/search?f=author&p=Tom%C3%A9%2C%20Ant%C3%B3nio&ln=it">Tomé, António</a> (Beira Interior U., Covilha) ; <a href="https://cds.cern.ch/search?f=author&p=Wagner%2C%20Robert&ln=it">Wagner, Robert</a> (Helsinki U.) ; <a href="https://cds.cern.ch/search?f=author&p=Yan%2C%20Chao&ln=it">Yan, Chao</a> (Helsinki U.) ; <a href="https://cds.cern.ch/search?f=author&p=Prevot%2C%20Andre%20S%20H&ln=it">Prevot, Andre S H</a> (PSI, Villigen) ; <a href="https://cds.cern.ch/search?f=author&p=Dommen%2C%20Josef&ln=it">Dommen, Josef</a> (PSI, Villigen) ; <a href="https://cds.cern.ch/search?f=author&p=Donahue%2C%20Neil%20M&ln=it">Donahue, Neil M</a> (Carnegie Mellon U.) ; <a href="https://cds.cern.ch/search?f=author&p=Hansel%2C%20Armin&ln=it">Hansel, Armin</a> (Innsbruck U.) ; <a href="https://cds.cern.ch/search?f=author&p=Curtius%2C%20Joachim&ln=it">Curtius, Joachim</a> (Frankfurt U., FIAS ; Frankfurt U.) ; <a href="https://cds.cern.ch/search?f=author&p=Winkler%2C%20Paul%20M&ln=it">Winkler, Paul M</a> (Vienna U., Dept. Math.) ; <a href="https://cds.cern.ch/search?f=author&p=Kulmala%2C%20Markku&ln=it">Kulmala, Markku</a> (Helsinki U. ; Helsinki Inst. of Phys.) ; <a href="https://cds.cern.ch/search?f=author&p=Volkamer%2C%20Rainer&ln=it">Volkamer, Rainer</a> (Colorado U.) ; <a href="https://cds.cern.ch/search?f=author&p=Flagan%2C%20Richard%20C&ln=it">Flagan, Richard C</a> (Caltech) ; <a href="https://cds.cern.ch/search?f=author&p=Kirkby%2C%20Jasper&ln=it">Kirkby, Jasper</a> (Frankfurt U., FIAS ; Frankfurt U. ; CERN) ; <a href="https://cds.cern.ch/search?f=author&p=Worsnop%2C%20Douglas%20R&ln=it">Worsnop, Douglas R</a> (Helsinki U. ; New England Nucl.) ; <a href="https://cds.cern.ch/search?f=author&p=Slowik%2C%20Jay%20G&ln=it">Slowik, Jay G</a> (PSI, Villigen) ; <a href="https://cds.cern.ch/search?f=author&p=Wang%2C%20Dongyu%20S&ln=it">Wang, Dongyu S</a> (PSI, Villigen) ; <a href="https://cds.cern.ch/search?f=author&p=Baltensperger%2C%20Urs&ln=it">Baltensperger, Urs</a> (PSI, Villigen) ; <a href="https://cds.cern.ch/search?f=author&p=el%20Haddad%2C%20Imad%20el&ln=it">el Haddad, Imad el</a> (PSI, Villigen)</span> <span id="extension"></span> <small><i><a id="link" href="#" onclick="toggle_authors_visibility()" style="color:rgb(204,0,0);"></a></i></small><script type="text/javascript">set_up()</script></td></tr> <tr><td class="formatRecordLabel"> Publication </td><td style="padding-left:5px;">2021</td></tr> <tr><td class="formatRecordLabel"> Number of pages </td><td style="padding-left:5px;">15</td></tr> <tr><td class="formatRecordLabel"> In: </td><td style="padding-left:5px;"><a href="http://dx.doi.org/10.1039/d1ea00050k"><i>Environmental Science: Atmospheres</i> 1 (2021) 434-448</a> </a></td></tr> <tr><td class="formatRecordLabel"> DOI </td><td style="padding-left:5px;"><a href="http://dx.doi.org/10.1039/d1ea00050k" title="DOI" target="_blank">10.1039/d1ea00050k</a> <tr><td class="formatRecordLabel"> Subject category </td><td style="padding-left:5px;">Astrophysics and Astronomy</td></tr> <tr><td class="formatRecordLabel"> Accelerator/Facility, Experiment </td><td style="padding-left:5px;"><a href="https://cds.cern.ch/search?p=CERN%20PS&f=693__a">CERN PS</a> ; <a href="https://cds.cern.ch/search?p=CLOUD&f=693__e">CLOUD</a></td></tr> <tr><td class="formatRecordLabel"> Abstract </td><td style="padding-left:5px;">Aerosol particles negatively affect human health while also having climatic relevance due to, for example, their ability to act as cloud condensation nuclei. Ultrafine particles (diameter D$_p$ < 100 nm) typically comprise the largest fraction of the total number concentration, however, their chemical characterization is difficult because of their low mass. Using an extractive electrospray time-of-flight mass spectrometer (EESI-TOF), we characterize the molecular composition of freshly nucleated particles from naphthalene and b-caryophyllene oxidation products at the CLOUD chamber at CERN. We perform a detailed intercomparison of the organic aerosol chemical composition measured by the EESI-TOF and an iodide adduct chemical ionization mass spectrometer equipped with a filter inlet for gases and aerosols (FIGAERO-I-CIMS). We also use an aerosol growth model based on the condensation of organic vapors to show that the chemical composition measured by the EESI-TOF is consistent with the expected condensed oxidation products. This agreement could be further improved by constraining the EESI-TOF compound-specific sensitivity or considering condensed-phase processes. Our results show that the EESI-TOF can obtain the chemical composition of particles as small as 20 nm in diameter with mass loadings as low as hundreds of ng m$^{-3}$ in real time. This was until now difficult to achieve, as other online instruments are often limited by size cutoffs, ionization/thermal fragmentation and/or semicontinuous sampling. Using real-time simultaneous gas- and particle-phase data, we discuss the condensation of naphthalene oxidation products on a molecular level.</td></tr> <tr><td class="formatRecordLabel"> Copyright/License </td><td style="padding-left:5px;">publication: (License: <a href="http://creativecommons.org/licenses/by-nc/3.0/">CC-BY-NC-3.0</a>)<br/>© 2021-2024 The Author(s)</td></tr> </table> <br/>Corresponding record in: <a href="http://inspirehep.net/record/2183067">Inspire</a> <small> </small> <br/> <br/><br/><div align="right"><div style="padding-bottom:2px;padding-top:30px;"><span class="moreinfo" style="margin-right:10px;"> <a href="" class="moreinfo">Back to search</a> </span></div></div> <div class="bottom-left-folded"><div class="recordlastmodifiedbox" style="position:relative;margin-left:1px"> Record creato 2022-11-30, modificato l'ultima volta il 2023-03-31</div></div> <div class="bottom-right-folded" style="text-align:right;padding-bottom:2px;"> <span class="moreinfo" style="margin-right:10px;"><a href="/search?ln=it&p=recid%3A2842555&rm=wrd" class="moreinfo">Record simili</a></span></div> </div> </div> </div> <br/> <br /> <div class="detailedrecordminipanel"> <div class="top-left"></div><div class="top-right"></div> <div class="inside"> <div id="detailedrecordminipanelfile" style="width:33%;float:left;text-align:center;margin-top:0"> <div><small class="detailedRecordActions">Testo completo:</small> <br /><a href="/record/2842555/files/d1ea00050k.pdf"><img style="border:none" src="/img/file-icon-text-34x48.gif" alt="Scarica documento" /><br />PDF</a><br /></div> </div> <div id="detailedrecordminipanelreview" style="width:30%;float:left;text-align:center"> </div> <div id="detailedrecordminipanelactions" style="width:36%;float:right;text-align:right;"> <ul class="detailedrecordactions"> <li><a href="/yourbaskets/add?ln=it&recid=2842555">Aggiungi ad un cestino personale</a></li> <li>Esporta come <a style="text-decoration:underline;font-weight:normal" href="/record/2842555/export/hx?ln=it">BibTeX</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/2842555/export/hm?ln=it">MARC</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/2842555/export/xm?ln=it">MARCXML</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/2842555/export/xd?ln=it">DC</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/2842555/export/xe?ln=it">EndNote</a>,  <a style="text-decoration:underline;font-weight:normal" href="/record/2842555/export/xn?ln=it">NLM</a>, <a style="text-decoration:underline;font-weight:normal" href="/record/2842555/export/xw?ln=it">RefWorks</a> </li> </ul> <div style='padding-left: 13px;'>  <div id="bookmark"></div> <div id="bookmark_sciencewise"></div> <style type="text/css"> #bookmark_sciencewise, #bookmark {float: left;} #bookmark_sciencewise li {padding: 2px; width: 25px;} #bookmark_sciencewise ul, #bookmark ul {list-style-image: none;} </style> <script type="text/javascript" src="/js/jquery.bookmark.min.js"></script> <style type="text/css">@import "/css/jquery.bookmark.css";</style> <script type="text/javascript">// <![CDATA[ $.bookmark.addSite('sciencewise', 'ScienceWise.info', 'https://cds.cern.ch/img/sciencewise.png', 'en', 'bookmark', 'http://sciencewise.info/bookmarks/cds:2842555/add'); $('#bookmark_sciencewise').bookmark({sites: ['sciencewise']}); $('#bookmark').bookmark({ sites: ['facebook', 'twitter', 'linkedin', 'google_plusone'], icons: '/img/bookmarks.png', url: 'https://cds.cern.ch/record/2842555', addEmail: true, title: "Molecular characterization of ultrafine particles using extractive electrospray time-of-flight mass spectrometry", description: "Aerosol particles negatively affect human health while also having climatic relevance due to, for example, their ability to act as cloud condensation nuclei. Ultrafine particles (diameter D$_p$ < 100 nm) typically comprise the largest fraction of the total number concentration, however, their chemical characterization is difficult because of their low mass. Using an extractive electrospray time-of-flight mass spectrometer (EESI-TOF), we characterize the molecular composition of freshly nucleated particles from naphthalene and b-caryophyllene oxidation products at the CLOUD chamber at CERN. We perform a detailed intercomparison of the organic aerosol chemical composition measured by the EESI-TOF and an iodide adduct chemical ionization mass spectrometer equipped with a filter inlet for gases and aerosols (FIGAERO-I-CIMS). We also use an aerosol growth model based on the condensation of organic vapors to show that the chemical composition measured by the EESI-TOF is consistent with the expected condensed oxidation products. This agreement could be further improved by constraining the\u00a0EESI-TOF compound-specific sensitivity or considering condensed-phase processes. Our results show that the EESI-TOF can obtain the chemical composition of particles as small as 20 nm in diameter with mass loadings as low as hundreds of ng m$^{-3}$ in real time. This was until now difficult to achieve, as other online instruments are often limited by size cutoffs, ionization/thermal fragmentation and/or semicontinuous sampling. Using real-time simultaneous gas- and particle-phase data, we discuss the condensation of naphthalene oxidation products on a molecular level." }); // ]]> </script>  </div> </div> <div style="clear:both;margin-bottom: 0;"></div> </div> <div class="bottom-left"></div><div class="bottom-right"></div> </div> </div></div> <footer id="footer" class="pagefooter clearfix">  <div class="pagefooterstripeleft"> CERN Document Server :: <a class="footer" href="https://cds.cern.ch/?ln=it">Cerca</a> :: <a class="footer" href="https://cds.cern.ch/submit?ln=it">Sottometti</a> :: <a class="footer" href="https://cds.cern.ch/youraccount/display?ln=it">Personalizza</a> :: <a class="footer" href="https://cds.cern.ch/help/?ln=it">Aiuto</a> :: <a class="footer" href="https://cern.service-now.com/service-portal?id=privacy_policy&se=CDS-Service" target="_blank">Privacy Notice</a> <br /> Fornita da <a class="footer" href="http://invenio-software.org/">Invenio</a> <br /> Mantenuto da <a class="footer" href="https://cern.service-now.com/service-portal?id=service_element&name=CDS-Service">CDS Service</a> - Need help? 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