Figure 1: Zero order absorption spectra of 3 µgml-1 MEH ( ), 15 µgml-1 DF (-----), 22 µgml-1 of MET (…….) and ternary mixture (-.-.-.-.-) (3 µgml-1 MEH, 15 µgml-1 DF and 22 µgml-1 MET) in methanol.