研究目的
Developing a novel, economic, and eco-friendly method for detecting ascorbic acid (AA) with excellent sensitivity using carbon quantum dots (CDs) and silver nanoparticles (AgNPs).
研究成果
The CD/Ag(I)/AgNP system provides a simple, sensitive, and selective method for AA detection with a low detection limit of 0.2 μM. The method is environmentally friendly and has potential applications in pharmaceutical, clinical, and food industry analyses.
研究不足
The study did not explore the application of the method in a wide range of real-world samples beyond AA tablets and human serum. The interference from other substances was minimized but not entirely eliminated.
1：Experimental Design and Method Selection:
The study utilized a fluorescence-based method leveraging the interaction between AA and Ag(I) in the presence of AgNP seeds to quench the fluorescence of CDs.
2：Sample Selection and Data Sources:
CDs were synthesized from mung bean shells, and AgNP seeds were prepared using silver nitrate and polyvinylpyrrolidone.
3：List of Experimental Equipment and Materials:
Instruments included an F-4500 fluorescence spectrophotometer, Hitachi H-7500 transmission electron microscope, and U-4100 spectrophotometer. Chemicals included silver nitrate, polyvinylpyrrolidone, sodium borohydride, and ascorbic acid.
4：Experimental Procedures and Operational Workflow:
CDs were synthesized by calcining mung bean shells, and AgNP seeds were prepared by reducing silver nitrate with sodium borohydride. Fluorescence titration experiments were conducted to measure the quenching effect of AA on CD fluorescence.
5：Data Analysis Methods:
The fluorescence intensity was measured and correlated with AA concentration to establish a linear relationship.
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