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<p>In the present work, an electrode was developed to detect rutin (RU) in food and pharmaceutical samples by electropolymerizing leucine (LU) on the surface of a bare graphite paste sensor (BGPS). Here, we successfully extracted graphite powder from the discharged battery and used it for the analysis of RU. The electrochemical behaviour of RU was analysed at the surface of a poly-LU modified graphite paste sensor (PLUMGPS) by implementing linear scanning voltammetry (LSV), and cyclic voltammetry (CV) in 0.2&#xa0;M phosphate buffer solution (PBS). In the pH range of 5.5 to 8.0, the developed sensor exhibited a good response at pH 6.5; hence, this pH was utilized for further analysis. The effect of various variables like accumulation time, accumulation potential, scan rate, and concentration of RU was studied. Under optimum conditions, PLUMGPS exhibited a linear response from 0.2 to 1.5 µM for CV with a quantification limit (QL) of 0.256 µM and a detection limit (DL) of 0.076 µM and LSV showed an DL of 0.033 µM, and an QL of 0.174 µM for the RU range of 0.2 to 1.0 µM. The PLUMGPS has good selectivity for RU in the presence of another flavonoid, quercetin (QC), showing two distinct peaks at different potentials. The interferents such as metal ions and organic compounds does not affect the PLUMGPS for the detection of RU. The sensor has decent repeatability, reproducibility, and stability. The developed PLUMGPS was successfully applicable for detecting RU in tea powder and tablet samples.</p>

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Batteries Carbon Waste Used Surface Modified Sensing Platform for the Electrochemical Analysis of the Antioxidant Rutin

  • 期刊论文

  • 发表日期：

    2025年4月3日

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  • Karnayana. P. Moulya,
  • Jamballi. G. Manjunatha,
  • Edwin. S. D’Souza,
  • D. K. Ravishankar

摘要

In the present work, an electrode was developed to detect rutin (RU) in food and pharmaceutical samples by electropolymerizing leucine (LU) on the surface of a bare graphite paste sensor (BGPS). Here, we successfully extracted graphite powder from the discharged battery and used it for the analysis of RU. The electrochemical behaviour of RU was analysed at the surface of a poly-LU modified graphite paste sensor (PLUMGPS) by implementing linear scanning voltammetry (LSV), and cyclic voltammetry (CV) in 0.2 M phosphate buffer solution (PBS). In the pH range of 5.5 to 8.0, the developed sensor exhibited a good response at pH 6.5; hence, this pH was utilized for further analysis. The effect of various variables like accumulation time, accumulation potential, scan rate, and concentration of RU was studied. Under optimum conditions, PLUMGPS exhibited a linear response from 0.2 to 1.5 µM for CV with a quantification limit (QL) of 0.256 µM and a detection limit (DL) of 0.076 µM and LSV showed an DL of 0.033 µM, and an QL of 0.174 µM for the RU range of 0.2 to 1.0 µM. The PLUMGPS has good selectivity for RU in the presence of another flavonoid, quercetin (QC), showing two distinct peaks at different potentials. The interferents such as metal ions and organic compounds does not affect the PLUMGPS for the detection of RU. The sensor has decent repeatability, reproducibility, and stability. The developed PLUMGPS was successfully applicable for detecting RU in tea powder and tablet samples.