IMPROVED DETECTION LIMIT OF THE PROTON-TRANSFER REACTION MASS-SPECTROMETER - ONLINE MONITORING OF VOLATILE ORGANIC-COMPOUNDS AT MIXING RATIOS OF A FEW PPTV

Authors
HANSEL A JORDAN A WARNEKE C HOLZINGER R LINDINGER W
Citation
A. Hansel et al., IMPROVED DETECTION LIMIT OF THE PROTON-TRANSFER REACTION MASS-SPECTROMETER - ONLINE MONITORING OF VOLATILE ORGANIC-COMPOUNDS AT MIXING RATIOS OF A FEW PPTV, Rapid communications in mass spectrometry, 12(13), 1998, pp. 871-875
Citations number
23
Categorie Soggetti
Spectroscopy,"Chemistry Analytical
Journal title
Rapid communications in mass spectrometry → ACNP
ISSN journal
09514198
Volume
12
Issue
13
Year of publication
1998
Pages
871 - 875
Database
ISI
SICI code
0951-4198(1998)12:13<871:IDLOTP>2.0.ZU;2-Q
Abstract
The sensitivity of our proton-transfer reaction mass spectrometer syst em has been improved by nearly two orders of magnitude, so that now on -line monitoring of volatile organic compounds at levels of a few pptv is possible. This has been demonstrated by means of calibration data down to 200 pptv and data on the diurnal variation of C9-alkylbenzene and its C-13-isotope in ambient air obtained at the western outskirts of Innsbruck During night time the concentration of C9-alkylbenzene sh owed minimum values of about 200 pptv and its 13C-isotope, representin g concentrations of ca. 20 pptv, closely followed time dependent relat ive variations of 10%, indicating a detection limit of 2 to 5 pptv. (C ) 1998 John Wiley & Sons, Ltd.