Sustainable strategy and rapid naked eye performance of novel Cu@SG nanosensor for detection of glyphosate in aquatic models

A rapid and sensitive colorimetric nanosensor was developed using a natural exudate as a sustainable reducing and capping agent. Copper nanoparticles stabilized with Sumac gum (CuNPs@SG) were employed as a sensitive colorimetric probe for detecting glyphosate in aqueous environments. Various techniques, including UV-Vis, FESEM, XRD, TEM, XPS, and Z.p analysis, were used to study and confirm the nanoscale properties of the sensor. The characterization of CuNPs@SG revealed that the nanoparticles were spherical and had sizes ranging from 50 to 53 nm. Additionally, the nanoparticles exhibited excellent LSPR at 599 nm, which was exploited for glyphosate detection. After optimizing experimental conditions, the proposed method successfully quantified glyphosate concentrations in aqueous samples, with a calibration curve ranging from 5 to 140 mg/L and an R² value of approximately 0.95. The method also demonstrated a low limit of detection (LOD) of 4.2 mg/L. The CuNPs@SG sensor was effectively applied for detecting glyphosate in aqueous samples, achieving satisfactory recovery rates. Furthermore, the nanosensor was tested on surfaces of plant parts sprayed with glyphosate solution, where it also showed excellent performance against the target pollutant. This approach provides a simple and practical solution for monitoring contaminants such as glyphosate in aquatic models and agricultural products. [Display omitted]