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Chapter 2 exercises answers briefly explain the basic principle of gas chromatography analysis to separate the components in the mixture by dividing the principle between the two phases. Gas chromatography is based on the separation of components and the affinity of the stationary phase and mobile phase. The components are continuously dissolved and volatilized between the stationary phase and the mobile phase (gas-liquid chromatography), or separated by adsorption and desorption, and then enter the detector for detection. 2. What are the basic equipment of the gas chromatograph? What is the role of each? The gas system. Sampling system, separation system, temperature control system and detection and recording system. The gas chromatograph has a closed gas path system that allows the carrier gas to continuously run the pipeline. The sampling system includes a sampling device and a gasification chamber. Its function is to vaporize the liquid or solid sample immediately before entering the chromatographic column, and then quickly and quantitatively transfer it to the chromatographic column.