Optimized Voltammetric Experiment for the Determination of Phloroglucinol at Surfactant Modified Carbon Nanotube Paste E
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HYSICAL INSTRUMENTS FOR ECOLOGY, MEDICINE, AND BIOLOGY
Optimized Voltammetric Experiment for the Determination of Phloroglucinol at Surfactant Modified Carbon Nanotube Paste Electrode Girish Tigaria and J. G. Manjunathaa,* aDepartment
of Chemistry, FMKMC College, Madikeri, Mangalore University Constituent College, Karnataka, India *e-mail: [email protected] Received February 19, 2020; revised April 9, 2020; accepted April 10, 2020
Abstract—Present work describes the electrochemical sensing and determination of phenolic compound (Phloroglucinol) using non-ionic surfactant Octyl phenol ethoxylate modified carbon nanotube paste electrode (OPEMCNTPE) in PBS (0.1 mol, pH 6.0) by Voltammetric method. The developed electrode was characterized by field emission scanning electron microscope (FE-SEM) and cyclic voltammetric (CV) studies. The OPEMCNTPE shows an exceptional catalytic impact towards the electro-oxidation of Phloroglucinol (PL) in contrast to the bare carbon nanotube paste electrode (BCNTPE). The rise in the concentration of PL is directly proportional to PL anodic peak current in the linear working range 10–90 μmol with a small detection limit (LOD) 0.71 μmol. This method was utilized for the estimation of PL in the water and blood serum samples. DOI: 10.1134/S0020441220050139
Phloroglucinol (PL) C6H3(OH)3 is an essential colourless phenolic substance that naturally occurs in plants. It is used in the production of explosives and pharmaceuticals. It has important medicinal value due to its antispasmodic action with less toxicity. It is also a reagent in lignin, vanillin, and pentose analysis. Overdose of PL causes adverse effects such as vomiting, ataxia, cyanosis, coma and choking. It is also destructive to the environment [1–7]. Hence, it is important to detect and trace the amount of PL. Existing methods in analysing PL such as chemiluminescence, high-performance liquid chromatography (HPLC/MS), and thinlayer chromatography, ion chromatography [8–11], etc are time-consuming and costly techniques. Few electroanalytical methods were also reported previously such as graphene oxide and iron hydroxide colloid modified glassy carbon electrode [12], ZnO⎯N-(tri methoxy silyl propyl) ethylenediamine tri acetic acid modified glassy carbon electrode [13] Surfactant/MWCNTS/Glassy carbon [14].
interfaces and enhance the electrochemical sensing properties of the electrode [21–25]. In this paper an active electrochemical sensor is fabricated based on the octyl phenol ethoxylate modified carbon nanotube paste electrode. To the best of our information, no voltammetry sensor was prepared based on octyl phenol ethoxylate modified carbon nanotube paste electrode for the detection of PL.
Carbon nanotubes are frequently used in electroanalysis of bioactive molecules due to their unique properties such as low background current, long potential domains, high electric conductivity, compatibility, stability, and easy surface modification, etc. [15–20]. The surfactants (cationic, anionic and non-ionic) are the substances that re
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