Highly sensitive determination of Bisphenol A in water and milk samples by using magnetic activated carbon – Cobalt nanocomposite-screen printed electrode

Abstract

An electrochemical sensor (modified screen-printed electrode using magnetic activated carbon – cobalt nanocomposite) was made for sensitive quantification of Bisphenol A. The scanning electron microscopic (SEM), X-ray powder diffraction (XRD), X-ray photoelectron spectroscopy (XPS) as well as Fourier transform infrared spectroscopy (FT-IR) were employed for finding the nanocomposite characteristics. The electrochemical measurements revealed that combination of magnetic activated carbon – cobalt nanocomposite and screen-printed electrode showed very good voltammetric responses toward Bisphenol A oxidation with the broad linear ranges between 0.1 and 350.0 μM and lower limit of detection (LOD) of 10.0 nM, and good sensitivity 218.1 μA mM−1 cm−2. Then, Bisphenol A in different water and milk samples were detected by the standard addition procedure. We observed reasonable findings with relative standard deviation of <3.1% for 6 parallel measurements. Hence, magnetic activated carbon – cobalt nanocomposite can be considered as one of the novel platforms for Bisphenol A to be electrochemically detected.