Quantitative Techniques To Discriminate
Petroleum Oils Using LED-induced Fluorescence
Author(s)
V. Rostampour & M. J. Lynch
Abstract
In-situ LED-induced fluorescence analysis of oils on water was performed by
examining the fluorescence spectrum of various Australian crude oils and some
refined oil products. Crude oils and other refined oil were discriminated using
non-contact fluorescence-based techniques. The spectral distribution of the
fluorescence emission, which contains obvious diagnostic potential, has been
used as a quantitative technique to differentiate oil products. The key factors
used in these quantitative techniques are; (i) spectral shape, (ii) the wavelength
of maximum intensity and (iii) fluorescence spectral width. The first
discriminating technique applied is the green-yellow quotient
( 575 490 I I I Y G = − ) and the blue-yellow quotient ( 575 420 I I I Y B = − ). The dualwavelength
excitation was employed in the laboratory to discriminate crude and
refined oils. In this technique, oil slicks (on water) were exposed to two different
excitation illumination wavelengths. All oil samples were illuminated by several
UV and visible excitation sources. The four crude oils and other petroleum
products were easily differentiated by applying the ratio of two fluorescence
spectral bands excited by 528 nm and 405 nm. While theses techniques appear to
be sensitive enough to discriminate different crude oils and other refined oil
products in the non-contact fluorescence measurement, the selected excitation
wavelength range chosen was not the optimum wavelength for fluorescence of
crude oil. More studies need to be performed using additional crude oil samples
and shorter excitation wavelengths.
Keywords: LED-induced fluorescence, oil pollution, crude oil, remote sensing.
Keywords
LED-induced fluorescence, oil pollution, crude oil, remote sensing.
Related Book
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