About chromatographic instruments
When the gas sample is used, the sample is injected directly; when the liquid phase is used, the sample is hit into the gasification chamber and then flows into the chromatographic column. The two column is gas phase in the chromatographic column.
Gas chromatography can be used as a liquid sample.
Chromatographic analysis is based on the difference between the partition coefficient of the material in the stationary phase and the flowing phase. The method of analysis is called chromatography analysis. According to the molecular aggregation state of mobile phase, liquid chromatography, gas chromatography and supercritical fluid chromatography are divided into liquid aggregation chromatography and so on. According to the separation principle, they can be classified into adsorption, distribution, space exclusion, ion exchange, affinity and chiral chromatography, and so on. According to the principle of operation, it can be divided into column chromatography and plate chromatography. Liquid chromatography is divided into two categories, classical and high-performance liquid chromatography, according to the performance of stationary phase, the delivery pressure of mobile phase and the on-line detection device. Chromatography has become one of the most widely used and most analytical methods in pharmacopoeia. The column effect of capillary electrophoresis is up to 10 and seven times M-1. It has become one of the most important methods in life science research.
