Figure 2.

Absorption spectra recorded on a solution of Fe(III)/TA with concentration 2.00 × 10−5 and 2.01 × 10−5 mol L−1, respectively, at different pH values.

Absorption spectra recorded on a solution of Fe(III)/TA with concentration 2.00 × 10−5 and 2.01 × 10−5 mol L−1, respectively, at different pH values.