Method for detecting primary amine in anti-aging agents FR

A detection method and technology for primary amines, applied in the detection field of primary amines, can solve the problems of inability to completely detect the content of primary amines, inability to measure the content of primary amines, etc., and achieve the effects of good quality, simple operation and high accuracy

Inactive Publication Date: 2013-01-16
KEMAI CHEM
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Problems solved by technology

But now only the HPLC method is used to determine the aniline content of one of the primary amines, and the HPLC method cannot be used to determine the co

Method used

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  • Method for detecting primary amine in anti-aging agents FR
  • Method for detecting primary amine in anti-aging agents FR

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Embodiment

[0019] 1. Preparation of reagents:

[0020] 1.7% hydrochloric acid: Dilute 200ml of 35% hydrochloric acid to 1000ml.

[0021] 2. p-Dimethylaminobenzaldehyde (DMAB) solution: weigh 5g of DMAB in a 500ml volumetric flask, dissolve it in 250ml of 7% hydrochloric acid, and dilute to 500ml with methanol.

[0022] 3. Aniline standard solution: Add 50ml of 7% hydrochloric acid water into a 100ml volumetric flask, accurately weigh 0.1068g of aniline and dissolve in the volumetric flask, dilute to the mark with 7% hydrochloric acid water.

[0023] 4. Prepare different concentrations of aniline standard solutions and standard reference solutions:

[0024] 1) Add 1ml, 2ml, 3ml, 4ml, 5ml, 6ml of aniline standard solution into six 100ml volumetric flasks respectively.

[0025] 2) Add 39ml, 38ml, 37ml, 36ml, 35ml, 34ml of 7% hydrochloric acid water to each of the above volumetric flasks one by one.

[0026] 3) Then accurately add 20ml of p-dimethylaminobenzaldehyde solution into each vol...

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Abstract

The invention provides a method for detecting primary amine in anti-aging agents FR. The method comprises the following steps of: preparing aniline standard solutions with different concentrations and a standard reference solution, respectively measuring the absorbance of the aniline standard solutions under the condition of the wavelength of 440 nanometers by using an ultraviolet and visible spectrophotometer after standing for 30 minutes, and drawing a standard curve of the aniline standard solutions by using the standard reference solution as a comparison solution; measuring the absorbance of a sample solution by the same method by using a sample reference solution as a comparison solution; and performing quantitative analysis by the aniline standard curve to obtain the content of the primary amine in the anti-agents FR in a sample. Compared with the conventional method only used for measuring the content of aniline which is one of the primary amine, the method is comprehensive in primary amine measuring range, and the quality of the anti-aging agents FR can be well controlled.

Description

technical field [0001] The invention relates to a method for detecting primary amines, in particular to a method for detecting primary amines in antiaging agent FR (2,2,4-trimethyl-1,2-dihydroquinoline polymer). Background technique [0002] Antiaging agent FR is one of the main rubber additives. The existence of the harmful primary amine in this product will affect the reversion of insoluble sulfur. When the content of primary amine is high, the unvulcanized rubber prepared with it is prone to spray frost phenomenon. The detection of primary amine content is an important means to ensure the quality of antioxidant FR. But now only the HPLC method is used to measure the aniline content of one of the primary amines, and the HPLC method cannot be used to determine the content of all primary amines. The existing methods cannot completely detect the content of primary amines, but can only detect the content of aniline in primary amines. When the content of primary amine is con...

Claims

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Application Information

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IPC IPC(8): G01N21/33
Inventor 白春梅
Owner KEMAI CHEM
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