The First Combined Thermal Desorption Aerosol Gas Chromatograph—Aerosol Mass Spectrometer (TAG-AMS)
The First Combined Thermal Desorption Aerosol Gas Chromatograph—Aerosol Mass Spectrometer (TAG-AMS)
复制标题
第一台组合式热脱附气溶胶气相色谱仪-气溶胶质谱仪 (TAG-AMS)
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
D. Worsnop
中科院分区：
文献类型：
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作者：
B. Williams;J. Jayne;A. Lambe;T. Hohaus;J. Kimmel;D. Sueper;W. Brooks;L. Williams;A. Trimborn;R. Martinez;P. L. Hayes;J. Jimenez;N. Kreisberg;S. Hering;D. Worton;A. Goldstein;D. Worsnop
为了满足改善环境颗粒物有机成分化学表征的迫切需求，我们引入了组合式热解吸气溶胶气相色谱仪-气溶胶质谱仪（TAG-AMS）。 TAG 系统提供环境气溶胶颗粒中有机化学物质的原位形态分析，具有每小时的时间分辨率，用于指示来源和转化过程的标记化合物。然而，TAG 本身无法通过颗粒大小进行分离，并且它通常仅对有机气溶胶 (OA) 质量的一小部分进行分类和定量。 AMS 是一种实时原位仪器，可提供环境细小 OA 和主要无机组分的定量粒度分布和质量负载；然而，由于在没有事先进行分子分离的情况下使用电子碰撞电离检测方案，AMS 本身识别单个有机化合物的能力有限。组合的 TAG-AMS 系统通过 AMS 进行实时检测，然后对 AMS 操作期间获取的 TAG 样品进行半连续分析，从而实现定量有机质量负载和详细有机形态形成的同步和互补测量。我们采用了高分辨率飞行时间质谱仪 (HR-ToF-MS)，能够对 AMS 上测量的 OA 氧化态进行元素水平测定，并改进化合物识别和 TAG 上测量的未解析复杂混合物 (UCM) 的分离。 TAG-AMS 接口是作为现有 AMS 系统的升级而开发的。此类测量将改进对环境气溶胶有机成分的识别，并有助于大气化学模型预测环境气溶胶成分和负荷的能力。版权所有 2014 美国气溶胶研究协会
To address the critical need for improving the chemical characterization of the organic composition of ambient particulate matter, we introduce a combined thermal desorption aerosol gas chromatograph—aerosol mass spectrometer (TAG-AMS). The TAG system provides in-situ speciation of organic chemicals in ambient aerosol particles with hourly time resolution for marker compounds indicative of sources and transformation processes. However, by itself the TAG cannot separate by particle size and it typically speciates and quantifies only a fraction of the organic aerosol (OA) mass. The AMS is a real-time, in-situ instrument that provides quantitative size distributions and mass loadings for ambient fine OA and major inorganic fractions; however, by itself the AMS has limited ability for identification of individual organic compounds due to the electron impact ionization detection scheme used without prior molecular separation. The combined TAG-AMS system provides real-time detection by AMS followed by semicontinuous analysis of the TAG sample that was acquired during AMS operation, achieving simultaneous and complementary measurements of quantitative organic mass loading and detailed organic speciation. We have employed a high-resolution time-of-flight mass spectrometer (HR-ToF-MS) to enable elemental-level determination of OA oxidation state as measured on the AMS, and to allow improved compound identification and separation of unresolved complex mixtures (UCM) measured on the TAG. The TAG-AMS interface has been developed as an upgrade for existing AMS systems. Such measurements will improve the identification of organic constituents of ambient aerosol and contribute to the ability of atmospheric chemistry models to predict ambient aerosol composition and loadings. Copyright 2014 American Association for Aerosol Research
影响因子：
6.3
作者：
D. Spracklen;J. Jimenez;K. Carslaw;D. Worsnop;M. J. Evans;G. Mann;Q. Zhang;M. Canagaratna;
通讯作者：
D. Spracklen;J. Jimenez;K. Carslaw;D. Worsnop;M. J. Evans;G. Mann;Q. Zhang;M. Canagaratna;
影响因子：
4.1
作者：
Ho, Steven Sai Hang;Yu, Jian Zhen;Schauer, James J.
通讯作者：
Schauer, James J.