| Main Title |
Analysis of ambient polar volatile organic compounds using chemical ionization-ion trap detector / |
| Other Authors |
|
| 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 |
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| 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 |
| ELBD ARCHIVE |
EPA 600-S3-89-070 |
In Binder Received from HQ |
AWBERC Library/Cincinnati,OH |
10/04/2023 |
|
| 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. |
| Place Published |
Research Triangle Park, N.C. |
| Corporate Au Added Ent |
Atmospheric Research and Exposure Assessment Laboratory (U.S.) |
| PUB Date Free Form |
1990 |
| BIB Level |
m |
| Medium |
unmediated |
| Content |
text |
| Carrier |
volume |
| Cataloging Source |
OCLC/T |
| OCLC Time Stamp |
20171019075658 |
| Language |
eng |
| Origin |
OCLC |
| Type |
CAT |
| OCLC Rec Leader |
02896cam 2200457Ia 45010 |
