A Novel APPI-MS Setup for In Situ Degradation Product Studies of Atmospherically Relevant Compounds: Capillary Atmospheric Pressure Photo Ionization (cAPPI)

A Novel APPI-MS Setup for In Situ Degradation Product Studies of Atmospherically Relevant Compounds: Capillary Atmospheric Pressure Photo Ionization (cAPPI)
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用于大气相关化合物原位降解产物研究的新型 APPI-MS 设置:毛细管大气压光电离 (cAPPI)

DOI:
10.1007/s13361-011-0212-y
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发表时间:
2011
影响因子:
3.2
通讯作者:
Th. Benter
Th. Benter
中科院分区:
化学3区
文献类型:
--
作者:
H. Kersten;V. Derpmann;I. Barnes;K.J. Brockmann;Th. Benter

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我们报告了一种新型大气压光电离装置的开发及其对大气相关化合物的原位降解产物研究的适用性。将定制的微型火花放电灯嵌入离子传输毛细管中,该毛细管将大气压与传统大气压电离质谱仪的第一差动泵级中的低压区域分开。该灯在连续的氩气流下工作,并在 VUV 中产生强烈的光发射。定制灯无窗运行,可有效照亮通过传输毛细管的小于 1 mm2 区域的样品流。较低 ppbV 范围内的检测限、正离子和准同时操作的负离子模式下的毫秒时间分辨率以及离子转化过程的显着减少使得该系统适用于快速变化的化学系统的实时研究。毛细管大气压光电离 (cAPPI) 方法的特点是灯发射特性与操作条件、时间响应的函数关系,以及其对大气相关化合物的原位降解产物研究的适用性。
We report on the development of a novel atmospheric pressure photoionization setup and its applicability for in situ degradation product studies of atmospherically relevant compounds. A custom miniature spark discharge lamp was embedded into an ion transfer capillary, which separates the atmospheric pressure from the low pressure region in the first differential pumping stage of a conventional atmospheric pressure ionization mass spectrometer. The lamp operates with a continuous argon flow and produces intense light emissions in the VUV. The custom lamp is operated windowless and efficiently illuminates the sample flow through the transfer capillary on an area smaller than 1 mm2. Limits of detection in the lower ppbV range, a temporal resolution of milliseconds in the positive as well as the quasi simultaneously operating negative ion mode, and a significant reduction of ion transformation processes render this system applicable to real time studies of rapidly changing chemical systems. The method termed capillary atmospheric pressure photo ionization (cAPPI) is characterized with respect to the lamp emission properties as a function of the operating conditions, temporal response, and its applicability for in situ degradation product studies of atmospherically relevant compounds, respectively.
微空心阴极放电中从氩二聚体到原子氧的共振能量转移
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发表时间: 2011
影响因子: 3.2
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