| Title: | "Online volatile organic compound measurements using a newly developed proton-transfer ion-trap mass spectrometry instrument during New England Air Quality Study--Intercontinental Transport and Chemical Transformation 2004: performance, intercomparison, and compound identification" |
| Author(s): | Warneke C; Kato S; de Gouw JA; Goldan PD; Kuster WC; Shao M; Lovejoy ER; Fall R; Fehsenfeld FC; |
| Address: | "National Oceanic and Atmospheric Administration, Aeronomy Laboratory, 325 Broadway, Boulder, Colorado 80305, USA. Carsten.Warneke@noaa.gov" |
| ISSN/ISBN: | 0013-936X (Print) 0013-936X (Linking) |
| Abstract: | "We have used a newly developed proton-transfer ion-trap mass spectrometry (PIT-MS) instrument for online trace gas analysis of volatile organic compounds (VOCs) during the 2004 New England Air Quality Study-Intercontinental Transport and Chemical Transformation study. The PIT-MS instrument uses proton-transfer reactions with H3O+ ions to ionize VOCs, similarto a PTR-MS (proton-transfer reaction mass spectrometry) instrument but uses an ion trap mass spectrometer to analyze the product ions. The advantages of an ion trap are the improved identification of VOCs and a near 100% duty cycle. During the experiment, the PIT-MS instrument had a detection limit between 0.05 and 0.3 pbbv (S/N = 3 (signal-to-noise ratio)) for 2-min integration time for most tested VOCs. PIT-MS was used for ambient air measurements onboard a research ship and agreed well with a gas chromatography mass spectrometer). The comparison included oxygenated VOCs, aromatic compounds, and others such as isoprene, monoterpenes, acetonitrile, and dimethyl sulfide. Automated collision-induced dissociation measurements were used to determine the contributions of acetone and propanal to the measured signal at 59 amu; both species are detected at this mass and are thus indistinguishable in conventional PTR-MS" |
| Keywords: | Air Movements Air Pollutants/*analysis Automation Environmental Monitoring/*methods *Internet Mass Spectrometry/*methods New England Organic Chemicals/analysis Volatilization; |
| Notes: | "MedlineWarneke, Carsten Kato, Shuji De Gouw, Joost A Goldan, Paul D Kuster, William C Shao, Min Lovejoy, Edward R Fall, Ray Fehsenfeld, Fred C eng Comparative Study Evaluation Study Research Support, U.S. Gov't, Non-P.H.S. 2005/08/09 Environ Sci Technol. 2005 Jul 15; 39(14):5390-7. doi: 10.1021/es050602o" |
