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RECORD NUMBER: 29 OF 264

OLS Field Name OLS Field Data
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
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Status
NTIS  PB85-219376 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/21/1988
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