Development and Optimization of Electrochemical Method for Determination of Vitamin C

Abstract

The focus of this work was to develop a simple electrochemical method for the determination of vitamin C (VitC) by using a specially constructed microelectrode made from pyrolytic graphite sheet (PGS). A procedure for quantifying VitC in a real sample was established. VitC shows a single quasi-reversible reaction. The method was optimized, and analytical determination was performed by using cyclic voltammetry and square wave voltammetry for electroanalytical purposes. The obtained results show a linear response of the PGS electrode in a wide concentrations range. For the lower concentration range, 0.18–7.04 µg L−1, the sensitivity is 11.7 µAcm−2/mgL−1, while for the higher concentration range, 10.6–70.4 µg L−1, the sensitivity is 134 µAcm−2/mgL−1, preserving the linearity of 0.998 and 0.999. The second objective was to determine the effect of the addition of five different types of “green” biowaste on plant growth, VitC content, and antioxidant activity in arugula (Eruca sativa L.) using the developed method. After three weeks of cultivation, small differences in growth and large differences in certain nutritional characteristics were observed. The addition of black coffee makes the soil slightly alkaline and causes a significant increase in VitC content and antioxidant activity.

Electrochemical Determination of Morphine in Urine Samples by Tailoring FeWO4/CPE Sensor

“…The electrochemical method gives us a possibility of real-time and on-site analysis, where equipment is not expensive and is easy to handle [ 8 , 9 , 10 ]. In addition, with the development of nanomaterials, we obtain the ability to synthesize a large number of high-performance electrochemical sensors in order to create the most sensitive and selective sensors for a specific analyte [ 8 , 11 , 12 , 13 , 14 , 15 ]. Over the years, many electrochemical sensors based on glassy carbon electrodes [ 8 , 10 , 13 , 14 , 16 ], platinum electrodes, and carbon-based electrodes have been developed [ 9 , 10 , 11 , 12 , 17 , 18 , 19 ].…”

Electrochemically Activatable Liquid Organic Hydrogen Carriers and Their Applications

“…First, since the oxidation of DHA to DKG can be accelerated by oxygen dissolved in electrolytes, the oxygen must be degassed in the electrolyte during electro-oxidation. Second, high-performance metallic catalysts can promote excessive oxidation of AA, whereas nonmetallic electrocatalysts can promote selective oxidation of AA. , Therefore, to advance the design of electrocatalysts, it is necessary to obtain mechanistic insights into the AA/DHA redox reactions on the surface of nonmetallic catalysts. Third, the stability of DHA decreases with increasing pH.…”

Environment-Friendly Approach to Isolate Ascorbic Acid from Plants and Micro-identified Using Fourier Transform Infrared Spectroscopy

“…8 Consequently, to consume AA reasonably, it is crucial to establish fast, sensitive, selective, reliable, and efficient approaches for the isolation and quantitation of AA in different matrices. 9 Recently, a study of AA has attracted many researchers. The number of reports related to AA has increased significantly, showing that this issue is becoming more and more famous.…”

“…Furthermore, the situation causes AA to be required to be consumed from foods such as vegetables and fruits, acting as primary sources . Consequently, to consume AA reasonably, it is crucial to establish fast, sensitive, selective, reliable, and efficient approaches for the isolation and quantitation of AA in different matrices …”