High Resolution PTR-TOF: Quantification and Formula Confirmation of VOC in Real Time

被引：295

作者：

Graus, Martin ^{[1
]}

Mueller, Markus ^{[1
,2
]}

Hansel, Armin ^{[1
]}

机构：

[1] Univ Innsbruck, Inst Ion Phys & Appl Phys, A-6020 Innsbruck, Austria

[2] Ionicon Analyt, Innsbruck, Austria

来源：

JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY | 2010年 / 21卷 / 06期

关键词：

VOLATILE ORGANIC-COMPOUNDS; REACTION MASS-SPECTROMETRY; ONLINE DETECTION; AIR; MS;

D O I：

10.1016/j.jasms.2010.02.006

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

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

引用

页码：1037 / 1044

页数：8

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