Laser Induced Fluorescence Detection of Gums in Jet Fuels
Final rept. Jul 1990-May 1992
SOUTHWEST RESEARCH INST SAN ANTONIO TX
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The current method ASTM D381 of determining the concentration of gums in jet fuels is a lengthy procedure requiring a large sample size. Because gum formation is believed to be an important step in the formation of deposits in fuel systems used in jet aircraft, a non-intrusive method of performing spatially resolved measurements of gum concentration in high temperature flow systems is a desired research tool. The present study was conducted to determine the feasibility of using laser-induced fluorescence LIF to monitor gum concentration in jet fuel. The study revealed several effects, such as aging and the interference of other fluoroshores with gum fluorescence, which require further investigation before LIF is to be considered a quantitative technique for measuring gums in jet fuels. However, this study showed that the formation of gums in jet fuels is detectable by LIF. The results show that gum formation in some fuels correlates strongly with LIF while for other fuels the results are ambiguous.
- Physical Chemistry
- Radiation and Nuclear Chemistry