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Method for identifying aromatic isomers 2-hydroxybenzoic acid and 3-hydroxybenzoic acid

A technology of hydroxybenzoic acid and isomers, applied in the field of qualitative analytical chemistry, can solve the problems of differentiation and identification that have not been reported yet

Active Publication Date: 2017-08-15
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But there is no report about the distinction between the two isomers of p-2-hydroxybenzoic acid and 3-hydroxybenzoic acid

Method used

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  • Method for identifying aromatic isomers 2-hydroxybenzoic acid and 3-hydroxybenzoic acid
  • Method for identifying aromatic isomers 2-hydroxybenzoic acid and 3-hydroxybenzoic acid
  • Method for identifying aromatic isomers 2-hydroxybenzoic acid and 3-hydroxybenzoic acid

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Experimental program
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Effect test

Embodiment 1

[0054] The present embodiment verifies the feasibility of the identification method of aromatic isomer 2-hydroxybenzoic acid and 3-hydroxybenzoic acid according to the following steps:

[0055] (1) Preparation solution

[0056] First prepare 0.026mol / L sulfuric acid with 98% concentrated sulfuric acid and distilled water as a stock solution, then use 0.026mol / L sulfuric acid solution as solvent to prepare respectively 0.13mol / L potassium iodate solution, 0.0183mol / L [NiL ](ClO 4 ) 2 Solution, 2.2mol / L malonic acid solution, 3.8mol / L hydrogen peroxide solution.

[0057] At the same time, double distilled water was used as solvent to prepare 0.12 mol / L solutions of 2-hydroxybenzoic acid and 3-hydroxybenzoic acid respectively.

[0058] (2) Oscillation spectrum

[0059] Add magnetons to a 50mL small beaker, then add 15mL 0.026mol / L sulfuric acid solution, 6mL 0.13mol / L potassium iodate solution, 2mL 0.0183mol / L [NiL](ClO 4 ) 2 solution, 3mL of 2.2mol / L malonic acid, and fina...

Embodiment 2

[0069] The present embodiment verifies the feasibility of the identification method of aromatic isomer 2-hydroxybenzoic acid and 3-hydroxybenzoic acid according to the following steps:

[0070] (1) Preparation solution

[0071] First prepare 0.026mol / L sulfuric acid with 98% concentrated sulfuric acid and distilled water as a stock solution, then use 0.026mol / L sulfuric acid solution as solvent to prepare respectively 0.13mol / L potassium iodate solution, 0.0183mol / L [NiL ](ClO 4 ) 2 Solution, 2.2mol / L malonic acid solution, 3.8mol / L hydrogen peroxide solution.

[0072] At the same time, double distilled water was used as a solvent to prepare 0.14 mol / L solutions of 2-hydroxybenzoic acid and 3-hydroxybenzoic acid respectively.

[0073] (2) Oscillation spectrum

[0074] Add a magnet to a 50mL small beaker, then add 5.5mL 0.026mol / L sulfuric acid solution, 10mL distilled water, 5.5mL 0.13mol / L potassium iodate solution, 2mL 0.0183mol / L [NiL](ClO 4 ) 2 solution, 3mL 2.2mol / L m...

Embodiment 3

[0084] The present embodiment verifies the feasibility of the identification method of aromatic isomer 2-hydroxybenzoic acid and 3-hydroxybenzoic acid according to the following steps:

[0085] (1) Preparation solution

[0086] First prepare 0.026mol / L sulfuric acid with 98% concentrated sulfuric acid and distilled water as a stock solution, then use 0.026mol / L sulfuric acid solution as solvent to prepare respectively 0.13mol / L potassium iodate solution, 0.0183mol / L [NiL ](ClO 4 ) 2 Solution, 2.2mol / L malonic acid solution, 3.8mol / L hydrogen peroxide solution.

[0087] At the same time, double distilled water was used as a solvent to prepare 0.2 mol / L solutions of 2-hydroxybenzoic acid and 3-hydroxybenzoic acid respectively.

[0088] (2) Oscillation spectrum

[0089] Add magnetons to a 50mL small beaker, then add 15mL 0.026mol / L sulfuric acid solution, 6mL 0.13mol / L potassium iodate solution, 1.5mL 0.0183mol / L [NiL](ClO 4 ) 2 solution, 3.5mL 2.2mol / L malonic acid was dis...

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Abstract

The invention discloses a method for identifying aromatic isomers 2-hydroxybenzoic acid and 3-hydroxybenzoic acid. The method is characterized by comprising the following steps: taking a 'H2SO4-KIO3-[NiL](ClO4)2-propanedioic acid-H2O2' nonlinear oscillating chemical system as an identification solution, and further distinguishing and identifying the aromatic isomers 2-hydroxybenzoic acid and 3-hydroxybenzoic acid according to oscillation response of the aromatic isomers on the system, wherein L in [NiL](ClO4)2 refers to 5,7,7,12,14,14-hexamethyl-1,4,8,11-tetraazamacrocyclo-4,11-diene. An oscillation spectrum provided by the identification method is intuitive, and the method is capable of conveniently and rapidly identifying the aromatic isomers 2-hydroxybenzoic acid and 3-hydroxybenzoic acid, can be widely applied to other isomers and is simple in equipment, high in accuracy and easy in operation and observation.

Description

technical field [0001] The present invention relates to a kind of distinguishing and identifying method, specifically a kind of nickel complex [NiL](ClO 4 ) 2 A method for the identification of the aromatic isomers 2-hydroxybenzoic acid and 3-hydroxybenzoic acid by a catalyzed nonlinear chemical system. It belongs to the field of qualitative analytical chemistry. Background technique [0002] 2-hydroxybenzoic acid and 3-hydroxybenzoic acid have the same molecular formula, both belong to aromatic isomers, and their structures are shown in the following formula (I). They each play a pivotal role in their respective fields. 2-Hydroxybenzoic acid (salicylic acid), an extract from the bark of the plant willow bark, is a natural anti-inflammatory. Salicylic acid is commonly used in dermatology to treat various chronic skin diseases such as acne (acne), ringworm, etc.; 3-hydroxybenzoic acid is used as a fungicide, paint, preservative, ion exchanger, plasticizer and intermediate...

Claims

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Application Information

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IPC IPC(8): G01N27/26G01N27/30G01N1/28
Inventor 胡刚张望宁沃奇
Owner ANHUI UNIVERSITY
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