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<front>
<journal-meta>
<journal-id journal-id-type="publisher">ACP</journal-id>
<journal-title-group>
<journal-title>Atmospheric Chemistry and Physics</journal-title>
<abbrev-journal-title abbrev-type="publisher">ACP</abbrev-journal-title>
</journal-title-group>
<issn pub-type="epub">1680-7324</issn>
<publisher><publisher-name>Copernicus GmbH</publisher-name>
<publisher-loc>Göttingen, Germany</publisher-loc>
</publisher>
</journal-meta>
<article-meta>
<article-id pub-id-type="doi">10.5194/acp-11-121-2011</article-id>
<title-group>
<article-title>Second-generation products contribute substantially to the particle-phase organic material produced by &amp;beta;-caryophyllene ozonolysis</article-title>
</title-group>
<contrib-group><contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Li</surname>
<given-names>Y. J.</given-names>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
<xref ref-type="aff" rid="aff2">
<sup>2</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Chen</surname>
<given-names>Q.</given-names>
</name>
<xref ref-type="aff" rid="aff3">
<sup>3</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Guzman</surname>
<given-names>M. I.</given-names>
</name>
<xref ref-type="aff" rid="aff3">
<sup>3</sup>
</xref>
<xref ref-type="aff" rid="aff6">
<sup>6</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Chan</surname>
<given-names>C. K.</given-names>
</name>
<xref ref-type="aff" rid="aff2">
<sup>2</sup>
</xref>
<xref ref-type="aff" rid="aff4">
<sup>4</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Martin</surname>
<given-names>S. T.</given-names>
</name>
<xref ref-type="aff" rid="aff3">
<sup>3</sup>
</xref>
<xref ref-type="aff" rid="aff5">
<sup>5</sup>
</xref>
</contrib>
</contrib-group><aff id="aff1">
<label>1</label>
<addr-line>Environmental Engineering Program,  Hong Kong University of Science and Technology,  Hong Kong,  China</addr-line>
</aff>
<aff id="aff2">
<label>2</label>
<addr-line>Division of Environment,  Hong Kong University of Science and Technology,  Hong Kong,  China</addr-line>
</aff>
<aff id="aff3">
<label>3</label>
<addr-line>School of Engineering and Applied Sciences,  Harvard University, Cambridge,  Massachusetts,  USA</addr-line>
</aff>
<aff id="aff4">
<label>4</label>
<addr-line>Department of Chemical and Biomolecular Engineering,  Hong Kong University of Science and Technology, Hong Kong,  China</addr-line>
</aff>
<aff id="aff5">
<label>5</label>
<addr-line>Department of Earth and Planetary Sciences,  Harvard University, Cambridge,  Massachusetts,  USA</addr-line>
</aff>
<aff id="aff6">
<label>6</label>
<addr-line>now at: Department of Chemistry,  University of Kentucky,  Lexington, Kentucky,  USA</addr-line>
</aff>
<pub-date pub-type="epub">
<day>06</day>
<month>01</month>
<year>2011</year>
</pub-date>
<volume>11</volume>
<issue>1</issue>
<fpage>121</fpage>
<lpage>132</lpage>
<permissions>
<license xlink:type="simple">
<license-p>This is an open-access article ditributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.</license-p>
</license>
</permissions>
<self-uri xlink:href="http://www.atmos-chem-phys.net/11/121/2011/acp-11-121-2011.html">This article is available from http://www.atmos-chem-phys.net/11/121/2011/acp-11-121-2011.html</self-uri>
<self-uri xlink:href="http://www.atmos-chem-phys.net/11/121/2011/acp-11-121-2011.pdf">The full text article is available as a PDF file from http://www.atmos-chem-phys.net/11/121/2011/acp-11-121-2011.pdf</self-uri>
<abstract>
<p>The production of secondary organic aerosol (SOA) by the dark ozonolysis of
gas-phase &amp;beta;-caryophyllene was studied.  The experiments were conducted
in a continuous-flow environmental chamber for organic particle mass
concentrations of 0.5 to 30 μg  m&lt;sup&gt;−3&lt;/sup&gt; and with ozone in excess,
thereby allowing the study of second-generation particle-phase products
under atmospherically relevant conditions.  The particle-phase products were
characterized by an ultra-performance liquid chromatograph equipped with an
electrospray ionization time-of-flight mass spectrometer (UPLC-ESI-ToF-MS).
Fragmentation mass spectra were used for the structural elucidation of each
product,  and the structures were confirmed as consistent with the
accurate &lt;i&gt;m&lt;/i&gt;/&lt;i&gt;z&lt;/i&gt; values of the parent ions.  In total,  fifteen products were
identified.  Of these, three are reported for the first time.  The structures
showed that 9 out of 15 particle-phase products were second generation,
including all three of the new products.  The relative abundance of the
second-generation products was approximately 90% by mass among the 15
observed products. The O:C and H:C elemental ratios of the 15 products ranged
from 0.13 to 0.50 and from 1.43 to 1.60,  respectively.  Fourteen of
the products contained 3 to 5 oxygen atoms.  A singular product,  which was one
of the three newly identified ones, had 7 oxygen atoms,  including 1
carboxylic group,  2 carbonyl groups,  and 3 hydroxyl groups.  It was
identified as 2, 3-dihydroxy-4-[2-(4-hydroxy-3-oxobutyl)-3, 3-dimethylcyclobutyl]-4-oxobutanoic
acid (C&lt;sub&gt;14&lt;/sub&gt;H&lt;sub&gt;22&lt;/sub&gt;O&lt;sub&gt;7&lt;/sub&gt;).  The estimated saturation vapor pressure
of this product is 3.3&amp;times;10&lt;sup&gt;&amp;minus;13&lt;/sup&gt;  Pa,  making this product a
candidate contributor to new particle formation in the atmosphere.</p>
</abstract>
<counts><page-count count="12"/></counts>
</article-meta>
</front>
<body/>
<back>
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