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

• DOI: 10.7454/mss.v28i1.2143
• Publication Date: 2024-06-03T03:06:42Z
• Authors: Emi Norzehan; Mohamad Mahbob; Mohamad Syahrizal; Illyas Md; Norhayati Hashim; Anwar Ul‐Hamid; Mohamad Ali Ahmad; Anwar Ul Hamid; Mohamad Idris Saidin; Suyanta Suyanta; Sofian Ibrahim

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