Fluorescence spectroscopy is a rapid, sensitive and selective method for identification of oil spills because most petroleum oils are fluorescent due to the presence of polycyclic aromatic hydrocarbons (PAHs) [4] and other species. Because of the limited ability as an exact diagnostic tool of conventional fluorescence, advanced and more complex fluorescence techniques such as synchronous excitation [5], fluorescence life time measurement [6], total synchronous fluorescence [7], and low temperature fluorescence [8] have been proposed.