Method for distinguishing 4-hydroxycoumarin (4-HC) and isomer 7-hydroxycoumarin (7-HC) thereof

A technology of hydroxycoumarin and isomers, applied in the direction of material electrochemical variables, etc.

Active Publication Date: 2019-07-23
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the identification method for distinguishing the two has not been reported, so it is very necessary to find a qualitative analysis method with good distinguishing effect, simple and fast operation, and easy judgment of the results.

Method used

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  • Method for distinguishing 4-hydroxycoumarin (4-HC) and isomer 7-hydroxycoumarin (7-HC) thereof
  • Method for distinguishing 4-hydroxycoumarin (4-HC) and isomer 7-hydroxycoumarin (7-HC) thereof
  • Method for distinguishing 4-hydroxycoumarin (4-HC) and isomer 7-hydroxycoumarin (7-HC) thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] This example verifies the feasibility of the method for distinguishing 4-hydroxycoumarin (4-HC) and its isomer 7-hydroxycoumarin (7-HC) of the present invention according to the following steps:

[0056] (1) Preparation solution

[0057] First prepare 0.951mol / L sulfuric acid with 98% concentrated sulfuric acid and distilled water as a stock solution, then use 0.951mol / L sulfuric acid solution to prepare 0.01734mol / L [CuL](ClO 4 ) 2 Solution, 1.92mol / L malic acid solution, 0.645mol / l sodium bromate solution. Add 28.5mL 0.951mol / L sulfuric acid solution, 5.5mL0.01734mol / L [CuL](ClO 4 ) 2 solution, 4.5mL 1.92mol / L malic acid solution, 1.5mL 0.645mol / l sodium bromate solution. To guarantee "H 2 SO 4 -NaBrO 3 - [CuL](ClO 4 ) 2 -Malic acid"The concentration of each component in the nonlinear chemical oscillation system is sulfuric acid 0.951mol / L, NaBrO 3 0.0241875mol / L 、[CuL](ClO 4 ) 2 0.00237875mol / L, malic acid 0.2158mol / L. Using ethanol as solvent, prepare 0...

Embodiment 2

[0066] This example verifies the feasibility of the method for distinguishing 4-hydroxycoumarin (4-HC) and its isomer 7-hydroxycoumarin (7-HC) of the present invention according to the following steps:

[0067] (1) Preparation solution

[0068] First prepare 0.951mol / L sulfuric acid with 98% concentrated sulfuric acid and distilled water as a stock solution, then use 0.951mol / L sulfuric acid solution to prepare 0.01734mol / L [CuL](ClO 4) 2 Solution, 1.92mol / L malic acid solution, 0.645mol / l sodium bromate solution. Add 29.5mL 0.951mol / L sulfuric acid solution, 4.7mL0.01734mol / L [CuL](ClO 4 ) 2 solution, 3mL 1.92mol / L malic acid solution, 2.8mL 0.645mol / l sodium bromate solution. To guarantee "H 2 SO 4 -NaBrO 3 - [CuL](ClO 4 ) 2 -Malic acid"The concentration of each component in the nonlinear chemical oscillation system is sulfuric acid 0.951mol / L, [CuL](ClO 4 ) 2 0.00203745mol / L, malic acid 0.14625mol / L, sodium bromate 0.04515mol / l. Using ethanol as solvent, prepare...

Embodiment 3

[0077] This example verifies the feasibility of the method for distinguishing 4-hydroxycoumarin (4-HC) and its isomer 7-hydroxycoumarin (7-HC) of the present invention according to the following steps:

[0078] (1) Preparation solution

[0079] First prepare 0.951mol / L sulfuric acid with 98% concentrated sulfuric acid and distilled water as a stock solution, then use 0.951mol / L sulfuric acid solution to prepare 0.01734mol / L [CuL](ClO 4 ) 2 Solution, 1.92mol / L malic acid solution, 0.645mol / l sodium bromate. Add 25mL 0.951mol / L sulfuric acid solution, 0.4ml distilled water, 6.8mL 0.01734mol / L [CuL](ClO 4 ) 2 solution, 4.8mL 1.92mol / L malic acid solution, 3mL 0.645mol / l sodium bromate solution. To guarantee "H 2 SO 4 -NaBrO 3 - [CuL](ClO 4 ) 2 -Malic acid"The concentration of each component in the nonlinear chemical oscillation system is sulfuric acid 0.94149mol / L, [CuL](ClO 4 ) 2 0.00294mol / L, malic acid 0.2304mol / L, sodium bromate 0.0483mol / L. Using ethanol as solve...

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Abstract

The invention discloses a method for distinguishing 4-hydroxycoumarin (4-HC) and isomer 7-hydroxycoumarin (7-HC) thereof, which is characterized in that a nonlinear chemical oscillation system of H2SO4-NaBrO3- [CuL] (ClO4) 2-malic acid is used as a distinguishing solution, according to the different influences of 4-hydroxycoumarin (4-HC) and isomer 7-hydroxycoumarin (7-HC) thereof on the oscillation spectrum peak shape of the oscillation system, thereby realizing the differentiation of 4-hydroxycoumarin (4-HC) and the isomer 7-hydroxycoumarin (7-HC) thereof. The potential oscillation spectrumprovided by the invention has intuition, can conveniently and quickly distinguish 4-hydroxycoumarin (4-HC) and the isomer 7-hydroxycoumarin (7-HC) thereof, and the device is simple, has high accuracyand is easy to operate and observe.

Description

technical field [0001] The present invention relates to a kind of distinguishing method, specifically a kind of copper complex [CuL](ClO 4 ) 2 The invention relates to a method for distinguishing 4-hydroxycoumarin (4-HC) and its isomer 7-hydroxycoumarin (7-HC) by a catalytic nonlinear chemical system, belonging to the field of qualitative analytical chemistry. Background technique [0002] 4-Hydroxycoumarin (4-HC) and its isomer 7-Hydroxycoumarin (7-HC) have the same molecular formula, belong to the isomers of the compound, and are in their respective fields play a pivotal role. 4-Hydroxycoumarin (4-HC) is a light yellow needle-like crystal with a violet aroma and is widely used in daily chemical flavors and tobacco flavors. The product is an intermediate of pharmaceuticals and pesticides, used in the production of anticoagulant drugs. It is also an intermediate of rodenticide. 7-Hydroxycoumarin (7-HC) can be used as a fluorescent indicator, acid-base indicator, etc. ...

Claims

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Application Information

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IPC IPC(8): G01N27/26
CPCG01N27/26
Inventor 胡刚张兰兰亚瑟周颖胡林宋继梅
Owner ANHUI UNIVERSITY
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