Sensitive determination of bisphenol A base on arginine functionalized nanocomposite graphene film

Arginine (Arg) functionalized graphene (Arg-G) nanocomposite was produced successfully by an environment-friendly method, and the morphology of the nanocomposite was characterized by transmission electron microscopy (TEM), Raman spectra, etc. Based on Arg-G nanocomposite, an electrochemical sensor was fabricated for sensitive detection of bisphenol A (BPA). The electrochemical behaviors of BPA on Arg-G modified glassy carbon electrode (GCE) were investigated by cyclic voltammetry (CV) and differential pulse voltammetry (DPV). Experimental parameters, such as the accumulation potential and time, scan rate, and the pH value of buffer solution were optimized. Under the optimized conditions, the oxidation peak current was proportional to BPA concentration in the range between 5.0 nmol/L and 40.0 μmol/L with the correlation coefficient of 0.9986 and the limit of detection of 1.1 nmol/L (S/N = 3). Moreover, the fabricated electrode also exhibited good reproducibility and stability. The proposed sensor was successfully employed to determine BPA in real plastic products and the recoveries were satisfactory.

► The water-soluble arginine functionalized graphene was produced successfully by an environment-friendly method.
► Electrochemical behaviors and some kinetic parameters of bisphenol A on the Arg-G/GCE were investigated.
► The proposed sensor showed more outstanding sensitivity properties toward the bisphenol A than the reported sensors.
► The proposed method opened a new simply way to detection of bisphenol A in the environmental protection.