Reflectance spectra of crude oils and refined petroleum products on a variety of common substrates

C. Scott Allen; Mark P. S. Krekeler

doi:10.1117/12.852200

4 May 2010 Reflectance spectra of crude oils and refined petroleum products on a variety of common substrates

C. Scott Allen, Mark P. S. Krekeler

Proceedings Volume 7687, Active and Passive Signatures; 76870L (2010) https://doi.org/10.1117/12.852200
Event: SPIE Defense, Security, and Sensing, 2010, Orlando, Florida, United States

Abstract

A variety of crude oils and refined petroleum products were applied to ten common terrestrial substrates with the goal of developing a set of representative reflectance spectra for hydrocarbon-substrate combinations. Similar to previous studies, each hydrocarbon darkened the substrates and produced hydrocarbon absorption features near 1200, 1690-1770, and 2270-2400 nm, along with a host of other minor features in the VIS/NIR/SWIR portion of the spectrum. Some substrate absorption features interfered with hydrocarbon absorptions, complicating spectral signatures. The reflectance spectra varied directly with the amount of liquid on the substrate. Liquid-saturated samples were left to age and regularly re-measured, establishing a relationship between evaporative loss for volatile and semivolatile products and sample reflectance. The results outline temporal windows of opportunity and minimum detection thresholds for volatiles. They also provide a means for remotely distinguishing 1) water from petroleum products on some substrates and 2) some similar hydrocarbons from one another based on their volatility.

Citation Download Citation

C. Scott Allen and Mark P. S. Krekeler "Reflectance spectra of crude oils and refined petroleum products on a variety of common substrates", Proc. SPIE 7687, Active and Passive Signatures, 76870L (4 May 2010); https://doi.org/10.1117/12.852200

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