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Main Title Laboratory evaluation of tunable atomic line molecular spectrometers for benzene analysis {MICROFICHE}
Author Scott, D. R. ; Hedgecoke, R. L.
Other Authors
Author Title of a Work
Hedgecoke, R. L.
CORP Author Environmental Monitoring Systems Lab., Research Triangle Park, NC.
Publisher U.S. Environmental Protection Agency, Environmental Monitoring Systems Laboratory ;
Year Published 1984
Report Number EPA-600/4-84-030
Stock Number PB84-177765
Subjects Benzene--Spectra ; Spectrum analysis
Additional Subjects Laboratory equipment ; Gas detectors ; Air pollution ; Gas analysis ; Chemical analysis ; Sampling ; Performance evaluation ; Design criteria ; Calibrating ; Feasibility ; Benzenes ; Benzene ; Tunable atomic line molecular spectroscopy ; Air pollution detection ; Toxic substances ; Procedures
Library Call Number Additional Info Location Last
NTIS  PB84-177765 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 43 p. ; 28 cm.
Tunable Atomic Line Molecular Spectroscopy (TALMS) is a high resolution, differential absorption technique used in the ultraviolet region. Under Interagency Agreements EPA-80-D-X1014 and AD-89-F-2A008 with Lawrence Berkeley Laboratory, two prototype TALMS instruments were designed, constructed, and delivered to the U.S. EPA at Research Triangle Park, North Carolina. TALMS I was a large laboratory instrument designed to demonstrate the feasibility of TALMS detection of toxic organic compounds. TALMS II was a more compact monitor for benzene designed for possible field applications. Both instruments were evaluated in the laboratory for performance characteristics in the analysis of benzene using the 253.7 nm mercury line. The tests included detection limit, precision, effect of temperature (TALMS I), effect of pressure (TALMS II), and interferences from organic compounds other than benzene. The prototype instruments evaluated can detect benzene precisely above the detection limit of 6 microgram. The apparent interferences from toluene and pyridine are relatively small and may be artifacts which can be eliminated with improvements in electronic signal processing. It was recommended that changes to the sample cell and electronics be made to improve the detection limit and that extension of the capabilities of TALMS to other organic compounds be made.
Caption title. Distributed to depository libraries in microfiche. "April 1984." "EPA-600/4-84-030." Microfiche.