Spectral characterization of four crude oils was attempted by using a different approach for time-resolved laser-induced fluorescence (TRF) techniques. The TRF spectra were excited by pulsed UV laser radiation at 250 nm and were measured at specific time windows of equal gate widths along the trailing edge of the pulsed laser. Contour diagrams of equal fluorescence intensities were then constructed to serve as unique fingerprints for the crude oils. The method does not require that the laser pulse be deconvoluted from the fluorescence signal, which makes it attractive for remote characterization of crude oil.
ASTM Book of Standards (American Society for Testing and Materials, Philadelphia, 1978), p. 720, D 3650–78.
2.
“Oil Spill Identification System”, Chemistry Branch, U.S. Coast Guard R&D Center, Report No. DOT-CG-D-52-77 (June 1977).
3.
Modern Fluorescence Spectroscopy, WehryE. L. Ed. (Plenum Press, New York, 1981), Chap. 7, p. 251, and references therein.
4.
LloydJ. B. F., J. Forens. Sci. Soc.11, 83 (1971).
5.
LloydJ. B. F., J. Forens. Sci. Soc.11, 235 (1971).
6.
LloydJ. B. F., J. Forens. Sci. Soc.11, 153 (1971).
7.
LloydJ. B. F., Analyst99, 729 (1974).
8.
HornigA. W., Proceedings, Pattern Recognition Applied to Oil Identification, Coronado, California (1976).
9.
WarnerI. M.ChristianG. D.DavidsonE. R. and CallisJ. B, Anal. Chem.49, 564 (1977).
10.
FantasiaJ. F.HardT. M. and IngraoH. C, Report No. DOT-TSC-USCG-71-7, Transportation Systems Center, Dept. of Transportation, Cambridge, Massachusetts (1971).
11.
FantasiaJ. F. and IngraoH. C, in Proceedings of the 9th International Symposium on Remote Sensing of the Environment, Ann Arbor, Michigan (1974), Paper 10700–1-X, pp. 1711–1745.
12.
MeasuresR. M.HoustonH. R. and StephensonD. G, Opt. Eng.13, 494 (1974).
13.
MeasuresR. M.GarlickJ.HoustonH. R. and StephensonD. G, Can. J. Remote Sensing1, 95 (1975).
14.
CamagniP.ColomboG.KoechlerC.PedriniA.OmenettoN. and RossiG, IEEE Trans. Geosci. Rem. Sens.GE-26, 22 (1988).
15.
CamagniP.ColomboG.KoechlerC.PedriniA.OmenettoN.QiP. and RossiG, Appl. Opt.30, 26 (1991).
16.
QuinnM. F.Al-OtaibiA. S.SethiP. S. and Al-BahraniF, J. Int. Rem. Sens.15, 2637 (1994).
