Figure 2.

UV absorption spectra of the ethanolic cassava leaf extract (BM) and reference UV filter (BEMT) at various concentrations: broad-spectrum UV absorption of BEMT-covered UV region (200–400 nm) with maximal absorption peaks (λmax) at 316 and 367 nm as the primary and secondary band, respectively (A1); absorptivity ($A_{1-cm}^{1\%}$) = 503.53 at 316 nm and 417.54 at 367 nm was manifested (A2). By contrast, absorption spectra of BM-covered UV and visible regions (200–700 nm) with λmax at 269, 363, and 355 nm as the primary, secondary, and tertiary bands, respectively (B1); $A_{1-cm}^{1\%}$ = 33.136 at 269 nm,28.881 at 363 nm, and 27.534 at 335 nm are displayed (B2). In addition, the overlay UV absorption spectra showed the equivalent UV absorption between BM at a concentration of 500 µg/mL and BEMT UV filter at 25 µg/mL (C).