Aerosol Chemistry Resolved by Mass Spectrometry: Linking Field Measurements of Cloud Condensation Nuclei Activity to Organic Aerosol Composition.
Aerosol Chemistry Resolved by Mass Spectrometry: Linking Field Measurements of Cloud Condensation Nuclei Activity to Organic Aerosol Composition.
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通过质谱解析气溶胶化学：将云凝结核活性的现场测量与有机气溶胶成分联系起来
DOI：
10.1021/acs.est.6b01675
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发表时间：
2016
影响因子：
11.4
通讯作者：
中科院分区：
文献类型：
--
作者：
2012年8月，在德国中部的一个乡村山顶站进行的一项综合化学表征研究中，通过使用补充在线质谱技术，将气溶胶的吸湿性与其化学成分联系起来。特别是，大气压化学电离质谱法（（-）APCI-MS）提供了1分钟时间分辨率的颗粒相中的有机酸，有机硫酸盐和硝基氧-有机硫酸盐的测量。过滤器样品的离线分析使我们能够确定在线（-）APCI-MS光谱中出现的信号的分子组成。气溶胶质谱仪（AMS）提供了亚微米有机物、硝酸盐、硫酸盐和铵的定量测量。无机硫酸盐测量通过半在线离子色谱法实现，并与AMS总硫酸盐质量进行比较。我们发现，高达40%的总硫酸根质量分数可以共价键合到有机分子。这一发现得到了在线和离线软电离技术的支持，该技术证实了颗粒相中存在几种有机硫酸盐和硝基氧基有机硫酸盐。的化学成分分析进行了比较，来自云凝结核计数器的吸湿性测量。我们观察到，吸湿性参数（κ），这是从AMS测量确定的有机质量分数可能会高估所观察到的κ高达0.2，如果一个高分数的硫酸根是键合到有机分子和光化学老化很少表现出来。
Aerosol hygroscopic properties were linked to its chemical composition by using complementary online mass spectrometric techniques in a comprehensive chemical characterization study at a rural mountaintop station in central Germany in August 2012. In particular, atmospheric pressure chemical ionization mass spectrometry ((−)APCI-MS) provided measurements of organic acids, organosulfates, and nitrooxy-organosulfates in the particle phase at 1 min time resolution. Offline analysis of filter samples enabled us to determine the molecular composition of signals appearing in the online (−)APCI-MS spectra. Aerosol mass spectrometry (AMS) provided quantitative measurements of total submicrometer organics, nitrate, sulfate, and ammonium. Inorganic sulfate measurements were achieved by semionline ion chromatography and were compared to the AMS total sulfate mass. We found that up to 40% of the total sulfate mass fraction can be covalently bonded to organic molecules. This finding is supported by both on- and offline soft ionization techniques, which confirmed the presence of several organosulfates and nitrooxy-organosulfates in the particle phase. The chemical composition analysis was compared to hygroscopicity measurements derived from a cloud condensation nuclei counter. We observed that the hygroscopicity parameter (κ) that is derived from organic mass fractions determined by AMS measurements may overestimate the observed κ up to 0.2 if a high fraction of sulfate is bonded to organic molecules and little photochemical aging is exhibited.
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影响因子：
4.5
作者：
Geller, MD;Biswas, S;Sioutas, C
通讯作者：
Sioutas, C
通过质谱法解析气溶胶化学：洞察环境新颗粒形成后的颗粒生长
影响因子：
11.4
作者：
通讯作者：
--
影响因子：
--
作者：
A. Wiedensohler;Yafang Cheng;A. Nowak;B. Wehner;P. Achtert;M. Berghof;W. Birmili;Zhijun Wu;
通讯作者：
A. Wiedensohler;Yafang Cheng;A. Nowak;B. Wehner;P. Achtert;M. Berghof;W. Birmili;Zhijun Wu;
影响因子：
6.3
作者：
Gunthe, S. S.;Rose, D.;Poeschl, U.
通讯作者：
Poeschl, U.
影响因子：
5.2
作者：
Jayne, JT;Leard, DC;Worsnop, DR
通讯作者：
Worsnop, DR