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Quantitative analysis method of benzotriazole compound

A technology for quantitative analysis of benzotriazoles, applied in the field of analytical chemistry, can solve the problems of cumbersome operation and low accuracy, and achieve the effect of simple operation, high accuracy and outstanding technical advantages

Pending Publication Date: 2022-03-01
深圳海关工业品检测技术中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The present invention aims at the technical defects of the prior art, and provides a quantitative analysis method for benzotriazole compounds, so as to solve the technical problems of cumbersome operation and low accuracy of conventional detection methods

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A quantitative analysis method for benzotriazole compounds, comprising the following steps: dissolving a sample to be tested in an aqueous solution of ethylene glycol, mixing with an aqueous solution of dipotassium hydrogen phosphate, and then evaporating to dryness at a temperature not higher than 80°C, Dissolve the residual solid with chloroform, adjust the pH to 3-4 after dilution, then oscillate ultrasonically for 5-10 minutes, add sodium nitroprusside-ethanol solution and mix well, transfer it to a colorimetric tube, and then detect the concentration at 550nm wavelength by spectrophotometry Absorbance; calculate the content of benzotriazole compounds in the sample to be tested.

Embodiment 2

[0025] A quantitative analysis method for benzotriazole compounds, comprising the following steps: taking a sample to be tested and dissolving it in an aqueous solution of ethylene glycol, mixing it with an aqueous solution of dipotassium hydrogen phosphate, and then evaporating to dryness at a temperature not higher than 80°C, Dissolve the residual solid with chloroform, adjust the pH to 3-4 after dilution, then oscillate ultrasonically for 5-10 minutes, add sodium nitroprusside-ethanol solution and mix well, transfer it to a colorimetric tube, and then detect the concentration at a wavelength of 550nm by spectrophotometry Absorbance; calculate the content of benzotriazole compounds in the sample to be tested. Wherein, the concentration of the aqueous solution of ethylene glycol is 0.3-0.5ml / mL. The volume ratio of the aqueous solution of ethylene glycol to the aqueous solution of dipotassium hydrogen phosphate is 1:1.5˜1:3. The evaporation to dryness at a temperature not hi...

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Abstract

The invention provides a quantitative analysis method of a benzotriazole compound. According to the technical scheme, a conventional fluorescence analysis method is abandoned, the sodium nitroprusside-ethanol solution serves as a color developing agent, quantitative detection is achieved through a colorimetric method, and therefore quantitative analysis of the benzotriazole compounds is achieved rapidly, simply and conveniently. Specifically, the method comprises the following steps: firstly, dissolving a to-be-detected sample by using low-concentration ethylene glycol, and uniformly mixing with a dipotassium phosphate solution; on the basis, low-temperature evaporation is carried out until the solution is dried, redissolution is carried out, and pH is adjusted, so that possible impurities are removed; the treated sample is mixed with a sodium nitroprusside-ethanol solution to perform color development, then the absorbance of the sample is detected at a specific wavelength by using a spectrophotometer, and the concentration of the benzotriazole compound under the wavelength and the absorbance of the solution conform to a relatively good linear relationship, so that the specific concentration of the benzotriazole compound can be calculated through a standard curve drawn in advance. The method is simple and convenient to operate and relatively high in accuracy, and has outstanding technical advantages.

Description

technical field [0001] The invention relates to the technical field of analytical chemistry, in particular to a quantitative analysis method for benzotriazole compounds. Background technique [0002] Benzotriazole, an organic compound, also known as benzotriazole, benzotriazole, triazindene, benzotriazole, etc., is a white to light pink needle-like crystal. Soluble in alcohol; benzene; toluene; chloroform, dimethylformamide and most organic solvents, slightly soluble in water, easily soluble in hot water, easily soluble in alkaline aqueous solution. In electroplating, it is used to purify silver, copper and zinc on the surface, and has anti-tarnish effect. In addition, benzotriazole is a good ultraviolet light absorber and can be used as a developing anti-fogging agent for black and white film and photographic paper. [0003] Benzotriazole has a wide range of applications in industry. When used in combination with ammonium hydroxide and ethylenediaminetetraacetic acid, it ...

Claims

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Application Information

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IPC IPC(8): G01N21/31
CPCG01N21/31
Inventor 江帆李成发林君峰方红谢堂堂
Owner 深圳海关工业品检测技术中心