الخلاصة

Dietary flavonoids (poly phenols) are important phytonutrient widely distributed in plant foods, flavonoids have beneficial biological activities, such as antioxidant activity, flavonoids can chelate with metal ions, the interaction of lead (II) ion with a poly hydroxylated flavonoids, the chrysin and hesperetin molecules, were investigated electrochemically in acidic media. The Differential puls polarographic Technique was used to determine the kinetic parameters (Kf, h, αn) using meites-israel method, also thermodynamic parameters such as enthalpy change (ΔH), free energy change (ΔG), entropy change (ΔS) of Pb+2 – complexes with chrysin and hesperetin at (293, 313) 0K. The (Kf, h, αn) values for the kinetics of the electrode processes show that the electrode processes were irreversible and diffusion controlled. Key words: Flavonoids, chrysin, hesperetin, Pb(II) – chrysin complex, Pb(II) – hesperetin complex, Polarographic, kinetic parameters, thermodynamic parameters.