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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-11-5945-2011</article-id>
<title-group>
<article-title>Investigations of primary and secondary particulate matter of different wood combustion appliances with a high-resolution time-of-flight aerosol mass spectrometer</article-title>
</title-group>
<contrib-group><contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Heringa</surname>
<given-names>M. F.</given-names>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>DeCarlo</surname>
<given-names>P. F.</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>Chirico</surname>
<given-names>R.</given-names>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
<xref ref-type="aff" rid="aff3">
<sup>3</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Tritscher</surname>
<given-names>T.</given-names>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Dommen</surname>
<given-names>J.</given-names>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Weingartner</surname>
<given-names>E.</given-names>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Richter</surname>
<given-names>R.</given-names>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Wehrle</surname>
<given-names>G.</given-names>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Prévôt</surname>
<given-names>A. S. H.</given-names>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Baltensperger</surname>
<given-names>U.</given-names>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
</contrib>
</contrib-group><aff id="aff1">
<label>1</label>
<addr-line>Laboratory of Atmospheric Chemistry, Paul Scherrer Institut, 5232 Villigen PSI, Switzerland</addr-line>
</aff>
<aff id="aff2">
<label>2</label>
<addr-line>now at: AAAS Science and Technology Policy Fellow hosted at the US EPA, Washington, DC, USA</addr-line>
</aff>
<aff id="aff3">
<label>3</label>
<addr-line>now at: Italian National Agency for New Technologies, Energy and Sustainable Economic Development (ENEA), UTAPRAD-DIM, Via E. Fermi 45, 00044 Frascati, Italy</addr-line>
</aff>
<pub-date pub-type="epub">
<day>23</day>
<month>06</month>
<year>2011</year>
</pub-date>
<volume>11</volume>
<issue>12</issue>
<fpage>5945</fpage>
<lpage>5957</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>
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<self-uri xlink:href="http://www.atmos-chem-phys.net/11/5945/2011/acp-11-5945-2011.pdf">The full text article is available as a PDF file from http://www.atmos-chem-phys.net/11/5945/2011/acp-11-5945-2011.pdf</self-uri>
<abstract>
<p>A series of photo-oxidation smog chamber experiments were performed to
investigate the primary emissions and secondary aerosol formation from two
different log wood burners and a residential pellet burner under different
burning conditions: starting and flaming phase. Emissions were sampled from
the chimney and injected into the smog chamber leading to primary organic
aerosol (POA) concentrations comparable to ambient levels. The composition
of the aerosol was measured by an Aerodyne high resolution time-of-flight
aerosol mass spectrometer (HR-TOF-AMS) and black carbon (BC)
instrumentation. The primary emissions were then exposed to xenon light to
initiate photo-chemistry and subsequent secondary organic aerosol (SOA)
production. After correcting for wall losses, the average increase in
organic matter (OM) concentrations by SOA formation for the starting and
flaming phase experiments with the two log wood burners was found to be a
factor of 4.1&amp;plusmn;1.4 after five hours of aging. No SOA formation was
observed for the stable burning phase of the pellet burner. The startup
emissions of the pellet burner showed an increase in OM concentration by a
factor of 3.3. Including the measured SOA formation potential, average
emission factors of BC+POA+SOA, calculated from CO&lt;sub&gt;2&lt;/sub&gt; emission, were
found to be in the range of 0.04 to 3.9 g/kg wood for the stable burning
pellet burner and an old log wood burner during startup respectively. SOA
contributed significantly to the ion C&lt;sub&gt;2&lt;/sub&gt;H&lt;sub&gt;4&lt;/sub&gt;O&lt;sub&gt;2&lt;/sub&gt;&lt;sup&gt;+&lt;/sup&gt; at mass to
charge ratio &lt;i&gt;m/z&lt;/i&gt; 60, a commonly used marker for primary emissions of wood
burning. This contribution at &lt;i&gt;m/z&lt;/i&gt; 60 can overcompensate for the degradation of
levoglucosan leading to an overestimation of the contribution of wood
burning or biomass burning to the total OM. The primary organic emissions
from the three different burners showed a wide range in O:C atomic ratio
(0.19&amp;minus;0.60) for the starting and flaming conditions, which also increased
during aging. Primary wood burning emissions have a rather low relative
contribution at &lt;i&gt;m/z&lt;/i&gt; 43 (&lt;i&gt;f&lt;/i&gt; 43) to the total organic mass spectrum. The
non-oxidized fragment C&lt;sub&gt;3&lt;/sub&gt;H&lt;sub&gt;7&lt;/sub&gt;&lt;sup&gt;+&lt;/sup&gt; has a considerable contribution
at &lt;i&gt;m/z&lt;/i&gt; 43 for the fresh OA with an increasing contribution of the oxygenated
ion C&lt;sub&gt;2&lt;/sub&gt;H&lt;sub&gt;3&lt;/sub&gt;O&lt;sup&gt;+&lt;/sup&gt; during aging. After five hours of aging, the OA
has a rather low C&lt;sub&gt;2&lt;/sub&gt;H&lt;sub&gt;3&lt;/sub&gt;O&lt;sup&gt;+&lt;/sup&gt; signal for a given CO&lt;sub&gt;2&lt;/sub&gt;&lt;sup&gt;+&lt;/sup&gt;
fraction, possibly indicating a higher ratio of acid to non-acid oxygenated
compounds in wood burning OA compared to other oxygenated organic aerosol (OOA).</p>
</abstract>
<counts><page-count count="13"/></counts>
</article-meta>
</front>
<body/>
<back>
<ref-list>
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