Work

Selective Fluorescence Detection of Glyphosate Pesticide Residue Based on Fe3+ Modulated SiQDs Nanosensors

Year: 2026

Type: article

Abstract: In this paper, SiQDs were synthesized using 3-aminopropyltrimethoxysilane, an organosilicon source, via the room temperature stirring method under atmospheric pressure. Based on the “Turn-off” and “Turn-on” fluorescence response mechanisms, the SiQDs/Fe3+ fluorescent probe was constructed to quantitatively detect glyphosate according to the interaction between Fe3+ and glyphosate. Subsequently, the impacts of pH, incubation temperature, and reaction time on the detection of glyphosate were systematically investigated. Under the optimized detection parameters, the fluorescent probe exhibited a linear range of 2–10 μg/mL and a detection limit of 394.74 ng/mL. The constructed fluorescent probe demonstrated outstanding anti-interference performance. It was applied to actual samples of potato and yam, yielding satisfactory detection results with recovery values between 91.69% and 104.53%. These findings provide novel ideas and theoretical support for glyphosate residue detection.

Source: Sensors

DOI: 10.3390/s26092851

Authors: Ruonan Li, Jian Xu, Fankui Zeng

Institutions: Chinese Academy of Sciences, Lanzhou Institute of Chemical Physics, University of Chinese Academy of Sciences

Language: English

Topic: Carbon and Quantum Dots Applications

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $3,137

Funder: Gansu Agricultural University