Fluorescence Spectroscopy Applied to Monitoring Biodiesel Degradation: Correlation with Acid Value and UV Absorption Analyses

Figure 4

Fluorescence intensity maps of S. indicum L. biodiesel (a, b, c) before the oxidative process and (d, e, f) after 48 h of degradation. Scattering not omitted.

(a)

(b)

(c)

(d)

(e)

(f)