Development of Aloe vera ‐titanium oxide‐based ultrasensitive sensor for the quantification of quercetin

In the present work, a novel sensor developed for the quantification of quercetin (QRC) is being reported. Due to synergistic effects of Aloe vera and titanium oxide, voltammetric performance of the developed sensor (ALV‐TiO 2 /glassy carbon electrode) was greatly enhanced. The fabricated sensor was characterized by scanning electron microscopy, X‐ray diffraction, energy dispersive X‐ray, and electrochemical impedance spectroscopy. The sensor was applied to study electrochemical behavior of QRC using square wave voltammetry. Under optimal condition, the developed sensor exhibited a linear response in the range of 3.3 × 10 −7 to 2.31 × 10 −6 µM with a detection limit of 0.8 nM. The analytical utility of the proposed sensor was justified by applying it for the analysis of QRC in real samples.