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Citation: LIU Xue-Ping, YANG Juan, BAI Yan. Determination of Ferric Ions Based on Fluorescence Quenching of Carbon Dots[J]. Chinese Journal of Analytical Chemistry, ;2016, 44(5): 804-808. doi: 10.11895/j.issn.0253-3820.150885 shu

Determination of Ferric Ions Based on Fluorescence Quenching of Carbon Dots

Department of Chemistry, College of Life Science and Technology, Jinan University, Guangzhou 510000, China

Received Date: 5 November 2015
Revised Date: 21 December 2015

Fund Project: This work was supported by the National Natural Science Foundation of China (No. 21075053)

The water soluble carbon dots with high stability and excellent photoluminescent properties were synthesized by one-step hydrothermal treatment of glycerol. Based on the significant quenching effect of ferric ion on the fluorescence of carbon dots, a method with high sensitivity and good selectivity for the determination of ferric ion was established. The ratio of fluorescence intensities (F₀/F₁) had a linear relationship with the concentration of ferric ion in the range of 0.005-1.2 mmol/L (R²=0.995) and the 3-s detection limit was 2.2 μmol/L. Furthermore, the standard deviation and the recovery of the method for determination of iron in Iron tablets were 0.41 mg/tablet and 95.5%-101.0%, respectively. The detection result of this method for Fe³⁺ ions was in agreement with that 1,10-phenanthroline spectrophotometry.
- Carbon dots,
- Glycerol,
- Hydrothermal method,
- Iron ions (Ⅲ)
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