High Resolution PTR-TOF: Quantification and Formula Confirmation of VOC in Real Time
High Resolution PTR-TOF: Quantification and Formula Confirmation of VOC in Real Time
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DOI：
10.1016/j.jasms.2010.02.006
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发表时间：
2010-06-01
影响因子：
3.2
通讯作者：
Hansel, Armin
中科院分区：
文献类型：
--
作者：
Graus, Martin;Mueller, Markus;Hansel, Armin
我们提出了前所未有的能力，以确定和量化挥发性有机化合物（VOCs）的质子转移反应飞行时间（PTR-TOF）质谱在线与高时间分辨率。4000-5000的质量分辨能力和2.5 ppm的质量精度允许烃（HC）和含氧VOC（OVOC）的明确的总和式鉴定。在11周的时间内测量的测试质量非常精确（SD < 3.4 ppm），质量分辨能力显示出良好的稳定性（SD < 5%）。基于1分钟的时间分辨率，我们证明了在低pptv范围内具有六个数量级的动态范围的检测限。亚ppbv VOC浓度可在一秒钟内分析;亚pptv检测限可在几十分钟内达到。我们提出了一个彻底的表征我们最近开发的PTR-TOF系统和地址的新仪器的应用领域。（J Am Soc Mass Spectrom 2010，21，1037-1044）（C）2010年美国质谱学会
We present the unprecedented capability to identify and quantify volatile organic compounds (VOCs) by means of proton transfer reaction time-of-flight (PTR-TOF) mass spectrometry on-line with high time resolution. A mass resolving power of 4000-5000 and a mass accuracy of 2.5 ppm allow for the unambiguous sum-formula identification of hydrocarbons (HCs) and oxygenated VOCs (OVOCs). Test masses measured over an 11-wk period are very precise (SD < 3.4 ppm) and the mass resolving power shows good stability (SD < 5%). Based on a 1 min time resolution, we demonstrate a detection limit in the low pptv range featuring a dynamic range of six orders of magnitude. Sub-ppbv VOC concentrations are analyzed within a second; sub-pptv detection limits are achieved within a few tens of minutes. We present a thorough characterization of our recently developed PTR-TOF system and address application fields for the new instrument. (J Am Soc Mass Spectrom 2010, 21, 1037-1044) (C) 2010 American Society for Mass Spectrometry