Combination of voltammetry and potentiometry was used for the study of Zn(II) solutions containing ManN and Gly.

Formation of binary [ZnManN]²⁺, and ternary [ZnManNGly]⁺/[ZnManNGlyH_-1] complexes were detected.

Redox processes of [ZnManN]²⁺ and [ZnManNGly]⁺ were registered at E_p ∼ −1.01 V, and −1.12 V at pH = 8.

Quantitative characterization of Zn(II) complexes was performed by potentiometric measurements.

log β_[ZnMan]²⁺$\text{log}{\beta }_{{[\text{ZnMan]}}^{2+}}$ = 2.7, log β_{[MaNZnGly]⁺}$\text{log}{\beta }_{{[\text{MaNZnGly]}}^{+}}$ = 7.7 and log β_{[MaNZnGlyH−1]}$\text{log}{\beta }_{[{\text{MaNZnGlyH}}_{-1}]}$ = −0.15.