title: Fluorescence excitation-emission matrix (EEM) spectroscopy and cavity ring-down (CRD) absorption spectroscopy of oil-contaminated jet fuel using fiber-optic probes.
abstract: Excitation emission matrix (EEM) and cavity ring-down (CRD) spectral signatures have been used to detect and quantitatively assess contamination of jet fuels with aero-turbine lubricating oil. The EEM spectrometer has been fiber-coupled to permit in situ measurements of jet turbine oil contamination of jet fuel. Parallel Factor (PARAFAC) analysis as well as Principal Component Analysis and Regression (PCA/PCR) were used to quantify oil contamination in a range from the limit of detection (10 ppm) to 1000 ppm. Fiber-loop cavity ring-down spectroscopy using a pulsed 355 nm laser was used to quantify the oil contamination in the range of 400 ppm to 100,000 ppm. Both methods in combination therefore permit the detection of oil contamination with a linear dynamic range of about 10,000.
authors.affiliation: Department of Chemistry, Queen's University, 90 Bader Lane, Kingston, ON K7L 3N6, Canada.
authors.forename: Hengameh
authors.initials: H
authors.lastname: Omrani
authors.forename: Jack A
authors.initials: JA
authors.lastname: Barnes
authors.forename: Alexander E
authors.initials: AE
authors.lastname: Dudelzak
authors.forename: Hans-Peter
authors.initials: HP
authors.lastname: Loock
authors.forename: Helen
authors.initials: H
authors.lastname: Waechter