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Abstract
Crude oil contains toxic polycyclic aromatic hydrocarbons (PAHs) that dissolve in seawater and persist, posing ecological risks. Fluorescence-based sensors track oil plumes, but interpretation and specificity remain limited. This study examined fluorescence properties of water-accommodated fractions (WAFs) from multiple crude oils and their photodegradation. Key excitation/emission ranges (240–270 nm, 305–360 nm) were consistent, with persistent peaks after solar exposure. GC×GC-TOFMS confirmed PAH composition. Results support refining fluorometer calibration to target these signatures, improving real-time monitoring of dispersed toxic oil components during marine spills.