Evidence for the Existence of Organosulfates from -Pinene Ozonolysis in Ambient Secondary Organic Aerosol

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• 作者：Yoshiteru Iinuma ; Conny M&uuml ; ller ; Torsten Berndt ; Olaf Bö ; ge ; Magda Claeys ; Hartmut Herrmann
• 刊名：Environmental Science & Technology
• 出版年：2007
• 出版时间：October 1, 2007
• 年：2007
• 卷：41
• 期：19
• 页码：6678 - 6683
• 全文大小：286K
• 年卷期：v.41,no.19(October 1, 2007)
• ISSN：1520-5851

文摘

The formation of organosulfates from the gas-phaseozonolysis of -pinene in the presence of neutral or acidicsulfate particles was investigated in a series of indooraerosol chamber experiments. The organosulfates wereanalyzed using high-performance liquid chromatography (LC)coupled to electrospray ionization-time-of-flight massspectrometry (MS) in parallel to ion trap MS. Organosulfateswere only found in secondary organic aerosol from-pinene ozonolysis in the presence of acidic sulfateseed particles. One of the detected organosulfates alsooccurred in ambient aerosol samples that were collectedat a forest site in northeastern Bavaria, Germany. -Pineneoxide, an oxidation product in -pinene/O₃ and -pinene/NO₃ reactions, is identified as a possible precursor for the-pinene-derived organosulfate. Furthermore, severalnitroxy-organosulfates originating from monoterpenes werefound in the ambient samples. These nitroxy-organosulfateswere only detected in the nighttime samples, suggestinga role for nighttime chemistry in their formation. Their LC/MS chromatographic peak intensities suggest that theyrepresent an important fraction of the organic mass in ambientaerosols, especially at night.