Record Display for the EPA National Library Catalog

RECORD NUMBER: 4 OF 126

OLS Field Name OLS Field Data
Main Title Analysis of ambient polar volatile organic compounds using chemical ionization-ion trap detector /
Other Authors
Author Title of a Work
Gordon, Sydney M.
Miller, Michael.
Publisher U.S. Environmental Protection Agency, Atmospheric Research and Exposure Assessment Laboratory,
Year Published 1990
Report Number EPA/600-S3-89-070
OCLC Number 436921747
Subjects Volatile organic compounds. ; Water vapor, Atmospheric. ; Ionization.
Internet Access
Description Access URL
http://nepis.epa.gov/Exe/ZyPDF.cgi?Dockey=2000TIQA.PDF
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
EJBD ARCHIVE EPA 600-S3-89-070 In Binder Headquarters Library/Washington,DC 04/10/2018
EJBD  EPA 600-S3-89-070 In Binder Headquarters Library/Washington,DC 11/19/2018
EKBD  EPA-600/S3-89-070 Research Triangle Park Library/RTP, NC 10/24/2017
Collation 3, [1] pages ; 28 cm
Notes
Caption title. "Feb. 1990." At head of title: Project summary. Distributed to depository libraries in microfiche. "EPA/600-S3-89-070."
Contents Notes
The current approach to measuring trace levels of volatile organic compounds (VOCs) in ambient air requires cryogenic trapping of the analytes, followed by thermal desorption and low-temperature refocusing onto a column for analysis by capillary gas chromatography/mass spectrometry (GC/MS). The approach has been successfully applied to nonpolar VOCs, but its use for more polar species has been complicated by the problems associated with the ambient water vapor collected with the VOCs. A promising technique for measuring polar VOCs is chemical ionization GC/MS (GC/CI-MS) in the quadrupole ion trap. The approach allows whole air samples to be taken since the water present in the air is used as the CI reagent gas. Water CI leads to appreciable intensities for the proton transfer agent H3O+, which produces intense pseudomolecular ions and class-specific fragmentation patterns for various low molecular weight polar compounds. Standard mixtures of polar species at low concentrations in humidified zero air were analyzed without a membrane dryer, using a cryogenic trap and CI-GC/MS with the ion trap detector in the full scan model.