Figure 5.
The UV spectra of 0.1 mM ZnCl2, 0.1 mM chlorogenic acid (5-CQA), 0.05 mM ZnCl2 plus 0.1 mM 5-CQA (molar ratio Zn:5-CQA 1:2) in Tris-HCl at pH = 7.4 registered in the range 200–450 nm.
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