Time-resolved laser-excited Shpol'skii spectrometry with a fiber-optic probe and ICCD camera
- Department of Chemistry, North Dakota State University, Fargo, North Dakota 58105 (United States)
- Dakota Technologies, Inc., 2201A 12th St. N., Fargo, North Dakota 58102-1803 (United States)
Improved methodology for chemical analysis via laser-excited Shpol'skii spectrometry is reported. The complications of traditional methodology for measurements at liquid nitrogen temperature are avoided by freezing the distal end of a bifurcated fiber-optic probe directly into the sample matrix. Emission wavelength-time matrices were rapidly collected by automatically incrementing the gate delay of an intensified charge-coupled device (ICCD) camera relative to the laser excitation pulse. The excitation source is a compact frequency-doubled tunable dye laser whose bandwidth (<0.03 nm) is well matched for Shpol'skii spectroscopy. Data reproducibility for quantitative analysis purposes and analytical figures of merit are demonstrated for several polycyclic aromatic hydrocarbons at 77 K. Although not attempted in this study, time-resolved excitation-emission matrices could easily be collected with this instrumental system. (c) 2000 Society for Applied Spectroscopy.
- OSTI ID:
- 20217414
- Journal Information:
- Applied Spectroscopy, Vol. 54, Issue 6; Other Information: PBD: Jun 2000; ISSN 0003-7028
- Country of Publication:
- United States
- Language:
- English
Similar Records
Derivatization of benz(a)anthracene metabolites for detection by laser excited Shpol'skii spectrometry
Convenient fiber-optic-based sample cell for Shpol'skii and low-temperature phosphorescence spectrometry