Tunable diode laser quantification of isomeric partially deuterated cyclobutanes and ethenes
A specially designed tunable diode laser (TDL) absorption spectrometerwhich operates near 900 and 1300 cm/sup /minus/1/ has been constructed in order toidentify and measure very low concentrations of product gases extractedfrom a single-pulse shock-tube experiment. The ultra-high-frequencyresolution of the TDL spectrometer (5 to 10 MHz) shows therotational fine structure in an absorption spectrum, clearlydistinguishing between isomers of the same compound. The spectrometerfeatures dualbeam detection in order to simultaneously acquiresource and reference gas spectra for unambiguous labeling of theproduct gases, and rapid sweep averaging, which minimizes the effectsof low-frequency mechanical vibrations and achieves very highsignal-to-noise ratio. /ital Cis/ and /ital trans/ isomers of1,2-d/sub 2/-cyclobutane were detected and measured in quantities of shock-tubeproducts as small as 75 cm/sup 3/-Torr. Several conformations of deuteratedethenes were also detected in samples smaller than 1 cm/sup 3/-Torr.
- Research Organization:
- Department of Physics (D.A.G.) and Chemistry (D.K.L.), Colgate University, Hamilton, New York 13346(US)
- OSTI ID:
- 6151709
- Journal Information:
- Appl. Spectrosc.; (United States), Journal Name: Appl. Spectrosc.; (United States) Vol. 43:2; ISSN APSPA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Monitoring of gaseous pollutants by tunable diode lasers
Multicomponent gas analyzers based on tunable diode lasers
Related Subjects
47 OTHER INSTRUMENTATION
ABSORPTION SPECTRA
ALKANES
ALKENES
BUTANE
DATA
DESIGN
ENERGY LEVELS
ENERGY RESOLUTION
ETHYLENE
EXCITED STATES
EXPERIMENTAL DATA
FABRICATION
FINE STRUCTURE
HYDROCARBONS
INFORMATION
INFRARED SPECTRA
ISOMERS
LASERS
MEASURING INSTRUMENTS
MEASURING METHODS
MOLECULAR STRUCTURE
NUMERICAL DATA
ORGANIC COMPOUNDS
PERFORMANCE
RESOLUTION
ROTATIONAL STATES
SHOCK TUBES
SIGNAL-TO-NOISE RATIO
SPECTRA
SPECTROMETERS