Detection method of N,N'-dicyclohexylurea and N,N'-dicyclohexylcarbodiimide

A technology of dicyclohexylcarbodiimide and dicyclohexylurea, applied in the field of chemical detection, can solve problems such as blanks, and achieve the effect of high accuracy and precision

Inactive Publication Date: 2020-02-04
谱尼测试集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the research on the qualitative and quantitative detection technology of N, N'-dicyclohexylurea and N, N'-dicyclohexylcarbodiimide at home and abroad is still blank.

Method used

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  • Detection method of N,N'-dicyclohexylurea and N,N'-dicyclohexylcarbodiimide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Example 1. Qualitative and quantitative detection of N, N'-dicyclohexylurea and N, N'-dicyclohexylcarbodiimide

[0011] Accurately weigh about 1g of the sample into a 10mL volumetric flask, dissolve it in methanol, and vortex to mix; make up to the mark with methanol, dilute with acetone, mix evenly, filter through an organic membrane, and wait for the test.

[0012] Agilent gas chromatography-mass spectrometer with EI source was used for analysis. At the same time, choose Agilent DB-5M S, 30m×0.25mm×0.25μm chromatographic column for separation. Other conditions are carrier gas flow rate: 1.2mL / min; injection volume: 1.0μL; injection port temperature: 280℃; The rate of 10°C / min is linearly increased to 290°C and kept for 6min; sample injection method: split flow, split ratio 5:1; carrier gas: helium; ionization energy: 70eV; scanning mode: SIM; solvent delay: 4min; transfer line temperature : 280°C; Ion source temperature: 230°C; Monitor ions: Quantitative ion m / z 55 ...

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Abstract

The invention belongs to the field of chemical detection, and discloses a detection method of N,N'-dicyclohexylurea and N,N'-dicyclohexylcarbodiimide. The detection method comprises the following steps: dissolving a sample with methanol; diluting with acetone; filtering with an organic filter membrane; and detecting with a gas chromatograph-mass spectrometer. The method has the advantages of highseparation degree, symmetrical peak pattern and relatively higher accuracy and precision, and fills up the technical blank of the simultaneous qualitative and quantitative detection of the N,N'-dicyclohexylurea and the N,N'-dicyclohexylcarbodiimide.

Description

technical field [0001] The invention belongs to the field of chemical product detection, and relates to a detection method for N, N'-dicyclohexylurea and N, N'-dicyclohexylcarbodiimide, in particular to a gas chromatography-mass spectrometer for detection of N, Methods of N'-dicyclohexylurea and N,N'-dicyclohexylcarbodiimide. Background technique [0002] N,N'-Dicyclohexylcarbodiimide is a good low-temperature biochemical dehydrating agent, which is often used in the synthesis and dehydration of amikacin and amino acids, and also in the synthesis of acids, anhydrides, aldehydes, and ketones. When N,N'-dicyclohexylcarbodiimide is used as a dehydration condensation agent, it can react at room temperature for a short time to produce N,N'-dicyclohexylurea. Therefore, when N,N'-dicyclohexylcarbodiimide is added as a dehydrating agent, it is easy to introduce both N,N'-dicyclohexylurea and N,N'-dicyclohexylcarbodiimide into the product. kind of substance. [0003] The content o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/06G01N30/14G01N30/72
CPCG01N30/02G01N30/06G01N30/14G01N30/72G01N2030/047G01N2030/146
Inventor 高俊海李婷
Owner 谱尼测试集团股份有限公司
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