Identification method for aromatic isomeride 3-hydroxybenzoic acid and 4-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

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

CN106908492AActive Publication Date: 2017-06-30永春县产品质量检验所福建省香产品质量检验中心国家燃香类产品质量监督检验中心福建
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  • Identification method for aromatic isomeride 3-hydroxybenzoic acid and 4-hydroxybenzoic acid
  • Identification method for aromatic isomeride 3-hydroxybenzoic acid and 4-hydroxybenzoic acid
  • Identification method for aromatic isomeride 3-hydroxybenzoic acid and 4-hydroxybenzoic acid

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] The present embodiment verifies the feasibility of the identification method of aromatic isomer 3-hydroxybenzoic acid and 4-hydroxybenzoic acid according to the following steps:

[0056] (1) Preparation solution

[0057] First use 98% concentrated sulfuric acid and distilled water to prepare 1.0mol / L sulfuric acid as a stock solution, then use 1.0mol / L sulfuric acid solution as a solvent to prepare 0.65mol / L sodium bromate solution and 2mol / L malic acid solution respectively , 1.74×10 - 2 mol / L of [CuL](ClO 4 ) 2 solution.

[0058] At the same time, double distilled water was used as solvent to prepare 0.16 mol / L solutions of 3-hydroxybenzoic acid and 4-hydroxybenzoic acid respectively.

[0059] (2) Oscillation spectrum

[0060] Add magnets to a 50mL small beaker, then add 29mL 1.0mol / L sulfuric acid solution, 1mL 0.65mol / L sodium bromate solution, 4mL 2mol / L malic acid solution, and finally add 6mL 1.74×10 -2 mol / L of [CuL](ClO 4 ) 2 Solution, maintain the tot...

Embodiment 2

[0070]The present embodiment verifies the feasibility of the identification method of aromatic isomer 3-hydroxybenzoic acid and 4-hydroxybenzoic acid according to the following steps:

[0071] (1) Preparation solution

[0072] First use 98% concentrated sulfuric acid and distilled water to prepare 1.0mol / L sulfuric acid as a stock solution, then use 1.0mol / L sulfuric acid solution as a solvent to prepare 0.65mol / L sodium bromate solution and 2mol / L malic acid solution respectively , 1.74×10 - 2 mol / L of [CuL](ClO 4 ) 2 solution.

[0073] At the same time, double distilled water was used as solvent to prepare 0.17 mol / L solutions of 3-hydroxybenzoic acid and 4-hydroxybenzoic acid respectively.

[0074] (2) Oscillation spectrum

[0075] Add magnets to a 50mL small beaker, then add 28.5mL 1.0mol / L sulfuric acid solution, 1.5mL 0.65mol / L sodium bromate solution, 4mL 2mol / L malic acid solution, and finally add 6mL 1.74×10 -2 mol / L of [CuL](ClO 4 ) 2 Solution, maintain the ...

Embodiment 3

[0085] The present embodiment verifies the feasibility of the identification method of aromatic isomer 3-hydroxybenzoic acid and 4-hydroxybenzoic acid according to the following steps:

[0086] (1) Preparation solution

[0087] First use 98% concentrated sulfuric acid and distilled water to prepare 1.0mol / L sulfuric acid as a stock solution, then use 1.0mol / L sulfuric acid solution as a solvent to prepare 0.65mol / L sodium bromate solution and 2mol / L malic acid solution respectively , 1.74×10 - 2 mol / L of [CuL](ClO 4 ) 2 solution.

[0088] At the same time, double distilled water was used as solvent to prepare 0.18 mol / L solutions of 3-hydroxybenzoic acid and 4-hydroxybenzoic acid respectively.

[0089] (2) Oscillation spectrum

[0090] Add magnets to a 50mL small beaker, then add 28.5mL 1.0mol / L sulfuric acid solution, 1mL 0.65mol / L sodium bromate solution, 4.5mL 2mol / L malic acid solution, and finally add 6mL 1.74×10 -2 mol / L of [CuL](ClO 4 ) 2 Solution, maintain the...

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Abstract

The invention discloses an identification method for aromatic isomeride 3-hydroxybenzoic acid and 4-hydroxybenzoic acid. The identification method is characterized in that a 'H2SO4-NaBrO3-[CuL](ClO4)2-malic acid' nonlinear chemical oscillation system serves as identification solution, distinguishing identification of aromatic for isomeride is achieved according different oscillatory responses of the aromatic isomeride 3-hydroxybenzoic acid and 4-hydroxybenzoic acid for the system, and L in the [CuL](ClO4)2 is 5, 7, 7, 12, 14, 14-hexamethyl-1, 4, 8, 11-tetraazacyclotetradecane-4, 11-diene. An oscillation spectrum provided by the identification method is more intuitive, the aromatic isomeride 3-hydroxybenzoic acid and 4-hydroxybenzoic acid can be conveinetly and rapidly identified, the oscillation spectrum can be widely applied to other isomerides, and the method is simple in device, high in accuracy and easy to operate and observe.

Description

technical field [0001] The present invention relates to a kind of distinguishing and identifying method, specifically a kind of copper complex [CuL](ClO 4 ) 2 A method for the identification of the aromatic isomers 3-hydroxybenzoic acid and 4-hydroxybenzoic acid by a catalyzed nonlinear chemical system. It belongs to the field of qualitative analytical chemistry. Background technique [0002] 3-hydroxybenzoic acid and 4-hydroxybenzoic acid have the same molecular formula, both belong to aromatic isomers, and their structures are shown in formula (I). 3-Hydroxybenzoic acid is used as a fungicide, coating, preservative, ion exchanger, plasticizer and pharmaceutical intermediate, and can also be used to synthesize azo dyes. 4-Hydroxybenzoic acid is mainly used as the basic raw material of fine chemical products, and it is also widely used in the preparation of various dyes, fungicides, color film and various oil-soluble couplers, etc., and 4-Hydroxybenzoic acid esters can be...

Claims

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Application Information

Patent Timeline
30 Jun 2017
Publication
CN106908492A
IPC
G01N27/26
CPC
G01N27/26
Inventors
胡刚; 沃奇