Abstract
According to this research, Quercetin (QR) is a crucial part of the human diet, making inexpensive, quick, and portable sensors necessary for its determination in food samples, dietary supplements, and pharmaceuticals. So, we prepared a hydrothermally synthesized PFO/RGO electrochemical sensor for quercetin detection. In this case, the synthesized composite was verified by XRD, FESEM, HRTEM, EDX, Raman, and XPS which confirms the crystallinity, particle-shaped irregular arrangements, presence of RGO, and elemental composition. EIS and CV analysis revealed the electrode material's electrical conductivity was increased by the RGO nanosheets, which supported the electrical conductivity of PFO. The electrochemical measurements proved the designed PFO/RGO sensor's excellent QR sensitivity and selectivity. The proposed sensor was optimized for sensing QR followed by a linear response of 0.01–225 µM and LOD of 0.026 µM with an excellent sensitivity of 1.674 µA µM−1 cm−2. We also evaluated the practical performance of the proposed PFO/RGO sensor against QR in the actual fruit samples, which showed good recovery results.
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