Synergistic Effect of Acylpyrazolone Integrated with Multiwalled Carbon Nanotubes on the Electrochemical Analysis of Ascorbic Acid

Authors

Emi Norzehan Mohamad Mahbob, Department of Chemistry, Faculty of Science and Mathematics, Universiti Pendidikan Sultan Idris, Tanjong Malim 35900, Malaysia
Mohamad Syahrizal Ahmad, Department of Chemistry, Faculty of Science and Mathematics, Universiti Pendidikan Sultan Idris, Tanjong Malim 35900, MalaysiaFollow
Illyas Md Isa, Department of Chemistry, Faculty of Science and Mathematics, Universiti Pendidikan Sultan Idris, Tanjong Malim 35900, Malaysia
Norhayati Hashim, Department of Chemistry, Faculty of Science and Mathematics, Universiti Pendidikan Sultan Idris, Tanjong Malim 35900, Malaysia
Anwar Ul-Hamid, Core Research Facilities, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia
Mohamad Idris Saidin, Department of Chemistry, Faculty of Science and Mathematics, Universiti Pendidikan Sultan Idris, Tanjong Malim 35900, Malaysia
Suyanta Suyanta, Department of Chemistry Education, Faculty of Mathematics and Natural Science, Yogyakarta State University, Yog-yakarta 55281, Indonesia
Sofian Ibrahim, Malaysian Nuclear Agency, Kajang 43000, Malaysia

Abstract

Square wave voltammetry, cyclic voltammetry, chronocoulometry, and electrochemical impedance spectroscopy were employed to assess ascorbic acid’s electrochemical behavior in multiwalled carbon nanotubes (MWCNTs)/carbon paste electrode (CPE) modified by 1-phenyl-3-methyl-4-metafluorobenzoyl-5-pyrazolone (HPMmFBP). The ascorbic acid’s irreversible oxidation peak appeared at approximately 0.5 V. The shifting of the peak potential at the pH range of 6.0–8.4 showed the involvement of protons in the ascorbic acid oxidation. Moreover, the shifting of the peak potential with scan rate in the range of 0.07–0.4 V/s confirmed that the oxidation reaction was irreversible. Under optimized conditions, the oxidative peak current showed linear dependence on the ascorbic acid’s concentration between 1 and 1000 μM with limit of detection (LOD) and quantification (LOQ) at 0.1 and 0.34 μM, respectively. HPMmFBP/MWCNT/CPE exhibit good antiinterference ability, reproducibility, repeatability, and stability and was utilized for the accurate and rapid ascorbic acid detection in commercial tablets. Therefore, it has good potential for practical application.

Recommended Citation

Mohamad Mahbob, Emi Norzehan; Ahmad, Mohamad Syahrizal; Md Isa, Illyas; Hashim, Norhayati; Ul-Hamid, Anwar; Saidin, Mohamad Idris; Suyanta, Suyanta; and Ibrahim, Sofian (2024) "Synergistic Effect of Acylpyrazolone Integrated with Multiwalled Carbon Nanotubes on the Electrochemical Analysis of Ascorbic Acid," Makara Journal of Science: Vol. 28: Iss. 1, Article 7.
DOI: 10.7454/mss.v28i1.2143
Available at: https://scholarhub.ui.ac.id/science/vol28/iss1/7