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[Chemical Knowledge]：Detection Method and Analysis Technology of Diethyl Oxalate

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Determination method

of diethyl oxalate

Diethyl oxalate, as an important chemical raw material, has a wide range of applications in industrial production, but its volatility and toxicity make its detection and analysis technology put forward higher requirements. At present, the detection methods for diethyl oxalate mainly include physical detection and chemical detection.

Physical detection methods mainly use physical principles to detect diethyl oxalate, such as gas chromatography (GC), infrared spectroscopy (IR) and mass spectrometry (MS). Among them, gas chromatography is one of the most commonly used detection methods, which can quickly and accurately determine the content and composition of diethyl oxalate by separating and detecting samples, and has the advantages of fast detection speed, high sensitivity and high accuracy. The infrared spectrum law is to identify the composition and structure of the sample by measuring the ability of the sample to absorb, scatter and transmit infrared light, which has the advantages of simple operation and high resolution. The mass spectrometry method is to determine the molecular structure and quality of diethyl oxalate molecules by measuring their trajectories in the electric field, which has the advantages of high analytical accuracy and high sensitivity.

Chemical detection methods are used to detect diethyl oxalate through chemical reactions, such as titration, color reaction and oxidation-reduction method. The titration method is to use the standard solution to be added dropwise into the test solution, and when the reaction end point is reached, the content of diethyl oxalate is determined by the color change of the solution or the change of the indicator. The law of color reaction is the use of diethyl oxalate and a specific reagent color reaction, through the change of color to determine its presence or absence and content. Oxidation-reduction law is the use of diethyl oxalate and oxidant or reducing agent oxidation-reduction reaction, through the reaction solution after the potential changes to determine its content and concentration.

The detection methods of diethyl oxalate are varied and have their own characteristics, and the appropriate detection methods can be selected according to the actual needs. In practical application, it is necessary to determine the detection method according to the nature and requirements of the sample, and combine the equipment and operation skills to carry out accurate and reliable detection and analysis to ensure product quality and production safety.

Analysis Technology of Diethyl Oxalate

The analysis technology of diethyl oxalate mainly includes qualitative analysis and quantitative analysis, aiming to accurately determine its existence and content, and provide technical support and guarantee for the production and application of related industries.

Qualitative analysis refers to the analytical method to determine whether a sample contains diethyl oxalate and its structural characteristics. Commonly used qualitative analysis techniques include nuclear magnetic resonance (NMR), mass spectrometry (MS/MS) and X-ray diffraction (XRD). Nuclear magnetic resonance technology uses the resonance absorption of nuclear spin under an external magnetic field to determine the structure and composition of molecules, which has the advantages of high resolution and high sensitivity. Mass spectrometry is the use of mass spectrometry and other analytical techniques (such as gas chromatography, liquid chromatography, etc.), through a variety of means of qualitative analysis of diethyl oxalate, with the advantages of fast analysis speed and high accuracy. X-ray diffraction technology uses X-ray to irradiate the sample, and determines the crystal structure and composition of the sample by analyzing the diffraction pattern, which has the advantages of non-destructive and comprehensive.

Quantitative analysis is an analytical method to determine the content and concentration of diethyl oxalate in the sample. Commonly used quantitative analysis techniques include colorimetry, fluorescence and electrochemical methods. Colorimetric method is the use of diethyl oxalate and a specific reagent color reaction, by comparing the color of the solution after the reaction to determine its content and concentration. Fluorescence law is the use of diethyl oxalate and a specific reagent fluorescence reaction, by measuring the fluorescence intensity to determine its content and concentration. The electrochemical law is to use the electrochemical behavior of diethyl oxalate in an electric field.

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