Research Article
Study of Complexes of Tannic Acid with Fe(III) and Fe(II)
Figure 1
UV-Vis absorption spectra of 1.000 × 10−5 mol/L tannic acid at different pH values. (a) pH = 1.0. (b) pH = 2.0. (c) pH = 3.0. (d) pH = 4.0. (e) pH = 5.0. (f) pH = 6.0. (g) pH = 7.0. (h) pH = 8.0. (i) pH = 9.0.
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