Figure 1

Zero order absorption spectra of 22.5 μg mL-1 MET (), 15 μg mL-1 DF (------), 3 μg mL-1 MEH (......) and 22.5 μg mL-1 METB (-.-.-.) in methanol.
Zero order absorption spectra of 22.5 μg mL-1 MET (), 15 μg mL-1 DF (------), 3 μg mL-1 MEH (......) and 22.5 μg mL-1 METB (-.-.-.) in methanol.