Limonene monitoring in citrus industry wastewater using molecularly imprinted voltammetric sensor

Author(s)

Zancan, Alexia Massinatore ; da Silva, Jose Luiz ; Stradiotto, Nelson Ramos

• Document type: Journal article
• Source: Talanta; v. 292, p. 9-pg., 2025-03-11.

Abstract

The present work reports the development of a novel molecularly imprinted polymer (MIP) electrochemical sensor for limonene determination in orange industry wastewater. MIP sensor was constructed through the pyrrole electropolymerization in the presence of limonene on glassy carbon electrode surface (GCE/MIP). Electrode surface as characterized by electrochemical, spectroscopy and microscopic techniques. The analysis was performed using differential pulse voltammetry, employing hexacyanoferrate as the electrochemically active probe. Under optimized conditions, the proposed GCE/MIP sensor displayed linear range from 1.0 to 100 pmol L- 1 with a high sensitivity (0.92 nA L pmol- 1) and low detection limit (0,87 pmol L- 1), as well as excellent storage stability, repeatability and reproducibility. The imprinted factor found for the sensor was 4.1 with high selectivity. The applicability of the sensor was successfully evaluated by limonene determination in yellow water sample. GCE/MIP showed recovery from 97 to 105 %. The results, altogether, indicate that the GCE/MIP sensor can provide a sensitive and selective method for limonene determination with accuracy and precision. (AU)

• FAPESP's process: 17/22401-8 - Fruit-refinery: obtention processes, characterization methods and generation of products derived from residues of the fruitculture
• Grantee: Nelson Ramos Stradiotto
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 14/23846-5 - New methods for determination of carboxylic acids, amino acids and polyols in vinasse of the manufacturing process of ethanol
• Grantee: Nelson Ramos Stradiotto
• Support Opportunities: Program for Research on Bioenergy (BIOEN) - Regular Program Grants