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Citation: Sheng Li, Zhang Meng, Zhang Xiao, Li Haisu, Xue Ziyan, Su Biquan. Kinetic Fluorimetric Determination of Trace Cobalt (Ⅱ) Based on Oxidation of Morin with Hydrogen Peroxide[J]. Chemistry, ;2019, 82(12): 1134-1137. shu

Kinetic Fluorimetric Determination of Trace Cobalt (Ⅱ) Based on Oxidation of Morin with Hydrogen Peroxide

Sheng Li ^1, ,
Zhang Meng ¹ ,
Zhang Xiao ¹ ,
Li Haisu ² ,
Xue Ziyan ³ ,
Su Biquan ¹

1.
College of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou 730070
2.
Key Institute of Lightwave Technology, Beijing Jiaotong University, Beijing 100044
3.
Zhangye Food and Drug Inspection Testing Center, Zhangye 734000

Received Date: 21 August 2019
Accepted Date: 3 October 2019

Figures(5)

A catalytic kinetic fluorescence method was developed using Co(Ⅱ) as a catalyst to catalyze the oxidation of morin by hydrogen peroxide. In the buffer solution of Na₂B₄O₇·10H₂O-NaOH at pH 10.70, trace cobalt (Ⅱ) ion has obvious catalytic effect on the oxidation of 4.0×10^-7mol/L morin solution with 0.24% H₂O₂ solution. At the maximum wavelength (λ_ex/λ_em=416.5nm/556.4nm), the fluorescence intensity of the system is linearly correlated with the concentration of Co (Ⅱ) in a concentration range of 0.8~8.0 μg/L, and the detection limit is 0.14 μg/L. The optimal conditions of the system were optimized and the ion interference of the system was investigated. The sierozem and molecular sieves samples were analyzed, the recovery rate were 95.0%~110.0% and 98.9%~101.9%.
- Catalytic kinetic fluorescence method,
- Cobalt(Ⅱ),
- Morin,
- Hydrogen peroxide
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