A new graphene nanocomposite modified electrode as efficient voltammetric sensor for determination of eriocitrin.

A new graphene nanocomposite, CeO 2 -poly(diallyldimethylammonium chloride)-graphene (CeO 2 -PDDA-GR), was prepared by an easy and low-cost hydrothermal method. The images of transmission electron microscopy (TEM) showed that well-shaped CeO 2 nanoparticles distributed more uniformly on the GR sheets. Based on the CeO 2 -PDDA-GR composites modified glassy carbon electrode, the electrochemical properties of eriocitrin were investigated in detail and a sensitive determination method was established synchronously. Differential pulse voltammetry (DPV) measurement revealed that the oxidation peak current increased linearly with eriocitrin concentrations in range of 1.0 × 10 − 8 mol L − 1 –1.0 × 10 − 6 mol L − 1 with detection limit of 7.0 × 10 − 10 mol L − 1 (S/N = 3). Moreover, the proposed method was used in determination of eriocitrin in lemon sample with accurate results. [ABSTRACT FROM AUTHOR]