Diethylene glycol diethyl ether is a commonly used chemical

Diethylene glycol diethyl ether (DEGDE) is a commonly used chemical, and its purity is one of the important indicators to measure its quality and performance. Below are some common methods to determine the purity of DEGDE.

Firstly, the purity of DEGDE can be preliminarily judged by its appearance. Pure DEGDE should be a colorless and transparent liquid, free from suspended solids and impurities. If there is color precipitation, suspended solids, turbidity and other phenomena, it may indicate that DEGDE contains impurities or has already undergone decomposition.

Secondly, a density meter can be used to measure the density of DEGDE. The density of pure DEGDE is 1.090 g/cm ³， If there is a significant deviation between the measurement results and the value, it may be due to the presence of impurities.

Once again, the optical rotation of DEGDE can be measured by using a polarimeter. Pure DEGDE should have no optical rotation property, that is, the optical rotation is 0. If the measurement results show optical rotation properties, it may be due to the presence of optical isomers or impurities.

In addition, an infrared spectrometer can also be used to analyze the purity of DEGDE. Pure DEGDE should have specific peaks and spectral patterns in the infrared spectrum. If there are other peaks or spectral patterns that do not follow the pattern, it may indicate that DEGDE contains impurities.

The purity of DEGDE can also be analyzed by gas chromatography (GC). GC is a commonly used analytical method that can separate and quantify compounds. Through GC analysis, the types and contents of various impurities in DEGDE can be detected. The number and relative peak area of impurity peaks separated can be used to evaluate the purity of DEGDE.

In addition, the melting point of the solution can be used to determine the purity of DEGDE. By comparing the measured melting point of DEGDE with the known melting point of pure DEGDE, it is possible to preliminarily determine the type and content of impurities contained in DEGDE. If the measured melting point is significantly lower than the melting point of pure DEGDE, it may be due to the presence of impurities causing a decrease in melting point.

Chemical analysis methods such as titration and stoichiometry can be used to analyze the content of a specific component in DEGDE and further evaluate its purity.