Its main functions include separation, qualitative analysis, and quantitative analysis. Using chromatographic separation and detection techniques, it can isolate compounds in complex mixtures and determine their relative content based on retention time. The separation principle of the gas chromatograph relies on the differing interactions between compounds and the stationary and mobile phases, enabling efficient, sensitive, and accurate analysis of samples.

The method is primarily used for analyzing organic compounds with high boiling points, low volatility, heat instability, and large molecular weights. It utilizes a high-pressure infusion system to pump liquids with different polarities as the mobile phase into a chromatographic column containing the stationary phase. The separation and analysis of the sample are achieved by the differing distribution coefficients of the components in the two phases.

Moisture analyzers play a crucial role in various fields. In the chemical industry, moisture analyzers help monitor changes in moisture during the reaction process, optimize reaction conditions, and improve product quality and production efficiency.

The melting point of solid crystalline substances is determined using a melting point apparatus. The melting point refers to the temperature at which a substance transitions from a solid to a liquid. The melting point apparatus measures this temperature change to determine the melting point of the substance. In industrial production, melting point apparatuses are used to monitor the production process and ensure that the product quality meets the required standards.