An Electrochemically Polymerized Glycine-Modified Carbon Paste Sensor for the Analysis of Carmoisine in the Presence of Environmentally Significant Dyes

Shashank, K. R. and Manjunatha, J. G. and Bhimaraya, K. and .Ravishankar, D. K. and Nandakumar, V. (2025) An Electrochemically Polymerized Glycine-Modified Carbon Paste Sensor for the Analysis of Carmoisine in the Presence of Environmentally Significant Dyes. Journal of Electronic Materials, 54 (11). ISSN 03615235

Text (Full Text) v9.pdf - Published Version Restricted to Registered users only Download (2MB) | Request a copy

Abstract

In the present work, we have conducted a sensitive and selective analysis of carmoisine (CMS) using a newly developed electrochemically polymerized glycine-modified carbon paste electrode (EPGMCPE). The EPGMCPE shows maximum current responses of CMS as compared to an unmodified carbon paste electrode (UMCPE) in 0.2 M phosphate-buffered saline (PBS) at pH 6.5, using a scan rate of 0.1 V/s. The evaluation and characterization of both the EPGMCPE and UMCPE were carried out using cyclic voltammetry (CV), differential pulse voltammetry (DPV), electrochemical impedance spectroscopy (EIS), and scanning electron microscopy (SEM). Compared to the UMCPE, the EPGMCPE showed an outstanding peak current and parameters such as pH study, active surface area, concentration variations. In DPV, the EPGMCPE showed a limit of detection (LOD) of 0.23 µM and limit of quantification (LOQ) of 0.79 µM, respectively. In CV, the LOD and LOQ were 0.16 µM and 0.55 µM, respectively. Furthermore, the modified electrode exhibited excellent sensitivity for detecting CMS, even in the simultaneous presence of indigo carmine (IC), methyl orange (MO), and methyl red (MR). In addition, the EPGMCPE shows good stability, reproducibility, and repeatability. Analytical applicability of the electrode was confirmed through the detection of CMS in real soft drink and tap water samples. © The Minerals, Metals & Materials Society 2025.

Item Type:	Article
Uncontrolled Keywords:	carbon paste electrode; Carmoisine; electrochemical sensors; glycine; voltammetric detection
Subjects:	C Chemical Science > Chemistry
Divisions:	Department of > Chemistry
Depositing User:	Vasantha library uom
Date Deposited:	29 Nov 2025 11:28
Last Modified:	29 Nov 2025 11:28
URI:	http://eprints.uni-mysore.ac.in/id/eprint/18109

Actions (login required)

View Item