Work

Hierarchical Ni-rGO nanocomposite derived from e-waste graphite for trace-level electrochemical sensing of metronidazole

Year: 2026

Type: article

Abstract: . The sensor exhibited high fabrication reproducibility (3.12% relative standard deviation across five independent electrodes), operational repeatability (95.4% signal retention over 10 continuous cycles), and storage stability (91.9% retention after 7 days). The analytical response remained unaffected by 10-fold excesses of common inorganic ions, endogenous biological species (dopamine, ascorbic acid, uric acid), and the structural analog imidazole, as well as 5-fold excesses of commonly used antibiotics, confirming the sensor's strict specificity toward the target analyte. Recovery rates of 87-108% across tap water and human urine matrices confirm the practical analytical utility of the Ni-rGO sensor for real-world MTZ monitoring in both environmental and clinical contexts.

Source: RSC Advances

DOI: 10.1039/d6ra06899e