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首页> 外文期刊>Environmental Science & Technology >An lodide-Adduct High-Resolution Time-of-Flight Chemical-lonization Mass Spectrometer: Application to Atmospheric Inorganic and Organic Compounds
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An lodide-Adduct High-Resolution Time-of-Flight Chemical-lonization Mass Spectrometer: Application to Atmospheric Inorganic and Organic Compounds

机译：碘化物加合物高分辨率飞行时间化学电离质谱仪：在大气无机和有机化合物中的应用

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摘要

A high-resolution time-of-flight chemical-ionization mass spectrometer (HR-ToF-CIMS) using Iodide-adducts has been characterized and deployed in several laboratory and field studies to measure a suite of organic and inorganic atmospheric species. The large negative mass defect of Iodide, combined with soft ionization and the high mass-accuracy (＜20ppm) and mass-resolving power (R ＞ 5500) of the time-of-flight mass spectrometer, provides an additional degree of separation and allows for the determination of elemental compositions for the vast majority of detected ions. Laboratory characterization reveals Iodide-adduct ionization generally exhibits Increasing sensitivity toward more polar or acidic volatile organic compounds. Simultaneous retrieval of a wide range of mass-to-charge ratios (m/Q from 25 to 625 Th) at a high frequency (＞1 Hz) provides a comprehensive view of atmospheric oxidative chemistry, particularly when sampling rapidly evolving plumes from fast moving platforms like an aircraft We present the sampling protocol, detection limits and observations from the first aircraft deployment for an instrument of this type, which took place aboard the NOAA WP-3D aircraft during the Southeast Nexus (SENEX) 2013 field campaign.
机译：使用碘化物加合物的高分辨率飞行时间化学电离质谱仪（HR-ToF-CIMS）已被表征并部署在一些实验室和现场研究中，以测量一组有机和无机大气物质。碘化物的较大负质量缺陷，再加上软电离和飞行时间质谱仪的高质量精度（＜20ppm）和质量分辨力（R＞ 5500），提供了更高的分离度并允许用于确定绝大多数检测离子的元素组成。实验室表征表明，碘化物加合物的电离通常表现出对极性更大或酸性更高的挥发性有机化合物的敏感性。在高频（> 1 Hz）下同时检索多种质荷比（m / Q，从25至625 Th）可提供大气氧化化学的全面视图，尤其是从快速移动的快速羽流中采样时像飞机这样的平台，我们将展示这种仪器首次在飞机上部署时的采样协议，检测限和观察结果，该仪器是在2013年东南联系（SENEX）野战期间在NOAA WP-3D飞机上进行的。

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  • 来源
    《Environmental Science & Technology》 |2014年第11期|6309-6317|共9页
  • 作者

    Ben H. Lee; Felipe D. Lopez-Hilfiker; Claudia Mohr; Theo Kurten; Douglas R. Worsnop; Joel A Thornton;

  • 作者单位

    Department of Atmospheric Sciences, University of Washington Seattle, Washington 98195, United States;

    Department of Atmospheric Sciences, University of Washington Seattle, Washington 98195, United States;

    Department of Atmospheric Sciences, University of Washington Seattle, Washington 98195, United States;

    Department of Chemistry, University of Helsinki Helsinki, Finland;

    Department of Physics Division of Atmospheric Sciences, University of Helsinki, Helsinki, Finland,Aerodyne Research, Inc., 45 Manning Rd, Billerica, Massachusetts 01821, United States;

    Department of Atmospheric Sciences, University of Washington Seattle, Washington 98195, United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
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