Simultaneous detection of hesperidin and narirutin in residual water using nanoporous platinum electrosynthesized by alloying-dealloying mechanism

Abstract

• An electrochemical sensor for the simultaneous determination of HES and NAR was performed. • 3D nanostructured porous platinum was electrosynthesized on the electrode surface. • 3DnpPt-SPE showed electrocatalytic current for HES and NAR oxidation. • The detection of HES and NAR in wastewater from citrus industry could be achieved. This paper reports the versatile preparation of three-dimensional nanostructured porous platinum (3DnpPt) directly on the surface of a screen-printed electrode via a simple electrochemical method and its application for the simultaneous voltammetric determination of hesperidin (HES) and narirutin (NAR) in residual water from the citrus industry. The surface morphology of the electrode was characterized by field-emission scanning electron microscopy (FEG-SEM), electron diffraction X-ray (EDX), X-ray photoelectron spectroscopy (XPS), and by the electrochemical impedance spectroscopic (EIS) technique. The results obtained from the voltammetric studies conducted showed that the sensor has good electrocatalytic activity and selectivity for HES and NAR oxidation. The linear scanning voltammetry (LSV) technique employed yielded linear ranges of 10 µmol L −1 to 0.4 mmol L −1 and 10 µmol L −1 to 0.5 mmol L −1 , with detection limits of 6.61 µmol L −1 and 0.21 µmol L −1 , and amperometric sensitivity of 0.52 A L mol −1 and 0.79 A L mol −1 for HES and NAR, respectively. The proposed 3DnpPt-SPE sensor also exhibited good repeatability and high selectivity, as well as long-term stability. The sensor was successfully applied in residual water sample for the simultaneous quantification of HES and NAR where good recovery rates were obtained.