Synergistic effect of acylpyrazolone integrated with multiwalled carbon nanotubes on the electrochemical analysis of ascorbic acid

Mohamad Syahrizal Ahmad

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Type :	Article
Subject :	Q Science (General)
ISBN :	2339-1995
Main Author :	Mohamad Syahrizal Ahmad
Additional Authors :	Illyas Md Isa Norhayati Hashim Mohamad Idris Saidin
Title :	Synergistic effect of acylpyrazolone integrated with multiwalled carbon nanotubes on the electrochemical analysis of ascorbic acid
Hits :	148

Place of Production :	Tanjung Malim
Publisher :	Fakulti Sains & Matematik
Year of Publication :	2024
Notes :	Makara Journal of Science
Corporate Name :	Universiti Pendidikan Sultan Idris
HTTP Link :	Click to view web link
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Abstract : Universiti Pendidikan Sultan Idris

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 _M with limit of detection (LOD) and quantification (LOQ) at 0.1 and 0.34 _M, 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. _ 2024, Universitas Indonesia. All rights reserved.

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