PTR3: An Instrument for Studying the Lifecycle of Reactive Organic Carbon in the Atmosphere
We have developed and characterized the novel PTR3, a proton transfer reaction-time-of-flight mass spectrometer (PTR-TOF) using a new gas inlet and an innovative reaction chamber design. The reaction chamber consists of a tripole operated with rf voltages generating an electric field only in the rad...
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| Veröffentlicht in: | Analytical chemistry (Washington) 2017-06, Vol.89 (11), p.5824-5831 |
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| creator | Breitenlechner, Martin Fischer, Lukas Hainer, Markus Heinritzi, Martin Curtius, Joachim Hansel, Armin |
| description | We have developed and characterized the novel PTR3, a proton transfer reaction-time-of-flight mass spectrometer (PTR-TOF) using a new gas inlet and an innovative reaction chamber design. The reaction chamber consists of a tripole operated with rf voltages generating an electric field only in the radial direction. An elevated electrical field is necessary to reduce clustering of primary hydronium (H3O+) and product ions with water molecules present in the sample gas. The axial movement of the ions is achieved by the sample gas flow only. Therefore, the new design allows a 30-fold longer reaction time and a 40-fold increase in pressure compared to standard PTR-TOF-MS. First calibration tests show sensitivities of up to 18000 counts per second/parts per billion and volume (cps/ppbv) at a mass resolution of >8000 m/Δm (fwhm). The new inlet using center-sampling through a critical orifice reduces wall losses of low volatility compounds. Therefore, the new PTR3 instrument is sensitive to VOC typically present in the ppbv range as well as to semivolatile organic compounds (SVOC) and even highly oxidized organic molecules (HOMs) present in the parts per quadrillion per volume (ppqv) range in the atmosphere. |
| doi_str_mv | 10.1021/acs.analchem.6b05110 |
| format | Article |
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The reaction chamber consists of a tripole operated with rf voltages generating an electric field only in the radial direction. An elevated electrical field is necessary to reduce clustering of primary hydronium (H3O+) and product ions with water molecules present in the sample gas. The axial movement of the ions is achieved by the sample gas flow only. Therefore, the new design allows a 30-fold longer reaction time and a 40-fold increase in pressure compared to standard PTR-TOF-MS. First calibration tests show sensitivities of up to 18000 counts per second/parts per billion and volume (cps/ppbv) at a mass resolution of >8000 m/Δm (fwhm). The new inlet using center-sampling through a critical orifice reduces wall losses of low volatility compounds. Therefore, the new PTR3 instrument is sensitive to VOC typically present in the ppbv range as well as to semivolatile organic compounds (SVOC) and even highly oxidized organic molecules (HOMs) present in the parts per quadrillion per volume (ppqv) range in the atmosphere.</description><identifier>ISSN: 0003-2700</identifier><identifier>EISSN: 1520-6882</identifier><identifier>DOI: 10.1021/acs.analchem.6b05110</identifier><identifier>PMID: 28436218</identifier><language>eng</language><publisher>United States: American Chemical Society</publisher><subject>Atmosphere ; Chemistry ; Clustering ; Electric fields ; Gas flow ; Ions ; Life cycle analysis ; Mass spectrometry ; Molecules ; Organic carbon ; Organic chemicals ; Organic chemistry ; Organic compounds ; Protons ; Reaction time ; VOCs ; Volatile organic compounds ; Volatility ; Water chemistry</subject><ispartof>Analytical chemistry (Washington), 2017-06, Vol.89 (11), p.5824-5831</ispartof><rights>Copyright © 2017 American Chemical Society</rights><rights>Copyright American Chemical Society Jun 6, 2017</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a564t-b51ae941d976554b5920ee51debb88be94c0a5dd0f2cb9fc467001ae3463777c3</citedby><cites>FETCH-LOGICAL-a564t-b51ae941d976554b5920ee51debb88be94c0a5dd0f2cb9fc467001ae3463777c3</cites><orcidid>0000-0002-1062-2394</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://pubs.acs.org/doi/pdf/10.1021/acs.analchem.6b05110$$EPDF$$P50$$Gacs$$H</linktopdf><linktohtml>$$Uhttps://pubs.acs.org/doi/10.1021/acs.analchem.6b05110$$EHTML$$P50$$Gacs$$H</linktohtml><link.rule.ids>314,776,780,2752,27053,27901,27902,56713,56763</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/28436218$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Breitenlechner, Martin</creatorcontrib><creatorcontrib>Fischer, Lukas</creatorcontrib><creatorcontrib>Hainer, Markus</creatorcontrib><creatorcontrib>Heinritzi, Martin</creatorcontrib><creatorcontrib>Curtius, Joachim</creatorcontrib><creatorcontrib>Hansel, Armin</creatorcontrib><title>PTR3: An Instrument for Studying the Lifecycle of Reactive Organic Carbon in the Atmosphere</title><title>Analytical chemistry (Washington)</title><addtitle>Anal. Chem</addtitle><description>We have developed and characterized the novel PTR3, a proton transfer reaction-time-of-flight mass spectrometer (PTR-TOF) using a new gas inlet and an innovative reaction chamber design. The reaction chamber consists of a tripole operated with rf voltages generating an electric field only in the radial direction. An elevated electrical field is necessary to reduce clustering of primary hydronium (H3O+) and product ions with water molecules present in the sample gas. The axial movement of the ions is achieved by the sample gas flow only. Therefore, the new design allows a 30-fold longer reaction time and a 40-fold increase in pressure compared to standard PTR-TOF-MS. First calibration tests show sensitivities of up to 18000 counts per second/parts per billion and volume (cps/ppbv) at a mass resolution of >8000 m/Δm (fwhm). The new inlet using center-sampling through a critical orifice reduces wall losses of low volatility compounds. 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| source | ACS Publications |
| subjects | Atmosphere Chemistry Clustering Electric fields Gas flow Ions Life cycle analysis Mass spectrometry Molecules Organic carbon Organic chemicals Organic chemistry Organic compounds Protons Reaction time VOCs Volatile organic compounds Volatility Water chemistry |
| title | PTR3: An Instrument for Studying the Lifecycle of Reactive Organic Carbon in the Atmosphere |
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