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The electrochemical behaviour of bisphenol A at modified graphite screen-printed electrode was studied using voltammetric technique. The prepared La 3+ /ZnO nanoflowers modified graphite screen-printed electrode (La 3+ /ZnO NFs/GSPE) exhibited more facile electron kinetics and enhanced current of about 2.5 when compared to the unmodified GSPE. Under optimum conditions, the La 3+ /ZnO NFs/GSPE detects the bisphenol A in the linear response ranging from 0.8 to 300.0 μM with a low limit of detection of 0.25 µM. Also, chronoamperometry was used to determine the diffusion coefficient (D = 1.1 × 10 −5 cm 2 /s). The method was successfully applied to the determination of bisphenol Ain real samples.

Determination of bisphenol A in real samples using modified graphite screen-printed electrode