Abstract
A novel and sensitive electrode was suggested for the rapid determination of ascorbic acid (AA) using a glassy carbon electrode (GCE) modified with synthesized MAPbI3 and L-cys (L-cys/MAPbI3/GCE). Determination of ascorbic acid as an important component of the human diet due to help in decreasing blood pressure and improving endothelial function is crucial. The synthesized MAPbI3 was characterized by different methods, including transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), and X-ray diffraction (XRD). The fabricated electrode exhibited superior electrical conductivity and fast electron transfer kinetics. The results illustrated that the developed electrode had an outstanding electrocatalytic activity towards the oxidation of AA in 0.1 M Britton–Robinson buffer(B-R) as a supporting electrolyte. The modified electrode demonstrated a linear range in differential pulse voltammetry of 0.02–11.4 µM with a low detection limit of 8.0 nM for ascorbic acid. It can be stated that the proposed sensor can be successfully applied to the determination of ascorbic acid in human plasma samples.
Highlights
Ascorbic acid (AA), namely vitamin-C, is a six-carbon lactone produced by plants and some animal species but not by humans or other primates, and it must be obtained from food
L-ascorbic acid is the more physiologically active of the two forms of vitamin C found in nature in fruits and vegetables such as oranges, broccoli, leafy greens, grapefruit, and peppers, and is the more useful, but the "D" form can be made via chemical synthesis but has no significant biological role
Elemental composition and percentage of as-synthesized MAPbI3 were validated through energydispersive X-ray spectroscopy (EDX) analysis(Figure 2D)
Summary
Ascorbic acid (AA), namely vitamin-C, is a six-carbon lactone produced by plants and some animal species but not by humans or other primates, and it must be obtained from food. L-ascorbic acid is the more physiologically active of the two forms of vitamin C found in nature in fruits and vegetables such as oranges, broccoli, leafy greens, grapefruit, and peppers, and is the more useful, but the "D" form can be made via chemical synthesis but has no significant biological role. L-ascorbic acid protects against hydroxyl radicals, superoxide, and singlet oxygen, among other things. Coronary artery disease, hypertension, and chronic heart failure benefit from L-ascorbic acid's endothelium-dependent vasodilation. Monitoring AA content should be regarded as an essential and relevant task for evaluating the quality of final food items, raw materials, and various other substances, considering the nutritional value and therapeutic AA characteristics
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