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Efficient Electrochemical Determination of Catechol with Hydroquinone at Poly (L‐Serine) Layered Carbon Paste Electrode
Author(s) -
Harshitha Bekya T.,
Manjunatha Jamballi G.,
Pushpanjali Pemmatte A.,
Karthik Chimatahalli S.,
Sandeep Shadakshari,
Mallu Puttaswamappa,
D'Souza Edwin,
Sreeharsha Nagaraja,
Asdaq Syed Mohammed Basheeruddin,
Anwer Md. Khalid
Publication year - 2021
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202101809
Subject(s) - hydroquinone , detection limit , electrode , catechol , materials science , electrochemistry , carbon paste electrode , chemically modified electrode , anode , analytical chemistry (journal) , nuclear chemistry , reference electrode , cyclic voltammetry , chemistry , chromatography , organic chemistry
The current endeavour presents the poly(L‐serine) modified carbon paste electrode (PLSMCPE) fabricated through an electropolymerization methodology for the electrochemical analysis of catechol (CC). Field emission scanning electron microscopy (FE‐SEM) images of unmodified and PLSMCPE were examined to study the surface structure and the formation of polymer layer on the electrode surface. The PLSMCPE was functionalized for the voltammetric detection and quantification of CC in 0.2 M phosphate buffer solution (PBS) with a pH of 6.5. In contrast to unmodified electrode the PLSMCPE presented to have nine‐fold enhancement in peak current and shift in anodic peak potential towards negative domain. The CV method showed good linear correlation between the concentration of CC and the oxidation peak current in the range from 2–50 μM, and the corresponding limit of detection (LOD) and limit of quantification (LOQ) were achieved to be 0.259 μM and 0.869 μM, respectively. Furthermore, this sensor is used to determine the analytical response in the co‐existence of CC and hydroquinone (HQ). The modified electrode is effectively functionalised for the analysis of CC in coffee powder sample.