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Preparation of Nitrogen-Doped Carbon Quantum Dots and Analysis and Detection of Vitamin B2
Abstract
This paper focuses on the preparation of nitrogen-doped carbon quantum dots (N-CQDs) from citric acid and urea, and their application in the detection of Vitamin B2. Citric acid was used as the carbon source and urea as the nitrogen source. N-CQDs were prepared by heating, after which they displayed excellent fluorescence performance and stability. The structure of the sample was then characterized using UV-visible spectrophotometry, fluorospectrophotometry, and Fourier Transform Infrared spectroscopy. Optimal pH, ultrasonic reaction time, and Vitamin B2 concentration for the N-CQDs were studied and optimized. Under optimal conditions (50 µL of N-CQDs, 2 mL of buffer solution with pH 4.0, and a reaction time of 30 min), the analysis and detection using fluorospectrophotometry demonstrated that Vitamin B2 caused significant fluorescence quenching of the prepared N-CQDs. With the standard recovery rate above 80%, these N-CQDs can serve as fluorescence probes for the analysis and detection of Vitamin B2 in actual food.
About the Authors
Hui Yang
Jiangsu Provincial Xuzhou Pharmaceutical Vocational College
China
China
Department of Pharmacy
Xuzhou, Jiangsu
Xiucheng Yang
The Second Affiliated Hospital Zhejiang University School of Medicine
China
China
Hangzhou, Zhejiang
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Review
For citations:
Yang H., Yang X. Preparation of Nitrogen-Doped Carbon Quantum Dots and Analysis and Detection of Vitamin B2. Zhurnal Prikladnoii Spektroskopii. 2026;93(1):144/1-144/9.
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