P1OS.1 - A Turn-off Fluorescent Sensor for Simple Detection of Vanillin Based on N-doped Carbon Dots
- 17th International Meeting on Chemical Sensors - IMCS 2018
2018-07-15 - 2018-07-19
- P-1 - Optical Sensors
- H. Zeng, L. Li, Y. Ding, Q. Zhuang, C. Wang - Department of Chemistry, Shanghai University, Baoshan District, Shanghai (China), X. Si - School of Public Health, Shanghai Aurora College, Shanghai (China)
- 618 - 619
Vanillin (Van) is an important fragrance, which is widely used as flavoring agents or perfume fixative in food, cosmetics, tobacco industry, medicine, etc. To our knowledge, carbon dots were first applied as fluorescence sensor for the quantitative determination of Van. The as-synthesized N-CDs were characterized by transmission electron microscopy (TEM), the fourier transform infrared spectra (FT-IR), UV spectrophotometer and spectrofluorophotometer, respectively. The fluorescent detection of Van was successfully conducted in aqueous media and incubation time was as short as 5 min. The proposed probe showed a great linear relationship between fluorescence intensity function log(F0/F) and concentration of Van in range from 5 µM to 140 µM with a detection limit (S/N=3) of 0.4 µM.