| Main Title |
Capability of GC/FT-IR to Identify Toxic Substances in Environmental Sample Extracts. |
| Author |
Gurka, D. F. ;
Laska, P. R. ;
Titus, R. ;
|
| CORP Author |
Environmental Monitoring Systems Lab., Las Vegas, NV. ;Nevada Univ., Las Vegas. Dept. of Chemistry. |
| Year Published |
1982 |
| Report Number |
EPA/600/J-82/445; |
| Stock Number |
PB85-219376 |
| Additional Subjects |
Environmental surveys ;
Gas chromatography ;
Chemical analysis ;
Infrared spectroscopy ;
Extraction ;
Feasibility ;
Assessments ;
Search structuring ;
Information systems ;
Reprints ;
Toxic substances ;
Fourier transform spectroscopy ;
Computer aided analysis ;
Listings ;
Computer applications
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB85-219376 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
12p |
| Abstract |
The minimum identifiable quantities of 55 toxic substances have been determined by packed column gas chromatography/Fourier transform infrared spectroscopy (GC/FT-IR) at conditions compatible with environmental extract analysis. Identification of each GC effluent component was accomplished with an IR reconstructed chromatogram, subsequent interferogram transformation, and on-line library search. GC/FT-IR exhibited its greatest sensitivity to aliphatic and aromatic organic compounds containing carbonyl or other oxygenated functional groups and its poorest sensitivity to alkyl halides and aromatic hydrocarbons. GC/FT-IR sensitivity was inversely proportional to the light pipe temperature. Extracts of the residue from a chemical plant still bottom were injected into the GC/FT-IR system, and the separated components were identified by utilizing an infrared reconstructed chromatogram (IRC) to locate interferogram files of high signal-to-noise ratio. Deconvolution techniques were used to separate the contributions of co-eluting IRC peaks. Interferogram files were then co-added and transformed. An on-line library search of 2300 vapor-phase infrared spectra provided sufficient chemical functionality information to identify most of the extract components. |
| Supplementary Notes |
Prepared in cooperation with Nevada Univ., Las Vegas. Dept. of Chemistry. |
| Availability Notes |
Pub. in Jnl. of Chromatographic Science, v20 p145-154 Apr 82. |
| NTIS Title Notes |
Journal article. |
| Title Annotations |
Reprint: Capability of GC/FT-IR to Identify Toxic Substances in Environmental Sample Extracts. |
| PUB Date Free Form |
c1982 |
| Category Codes |
7D; 5B; 68; 99A; 88B |
| NTIS Prices |
Not available NTIS |
| Primary Description |
600/07 |
| Document Type |
NT |
| Cataloging Source |
NTIS/MT |
| Control Number |
524126972 |
| Origin |
NTIS |
| Type |
CAT |
