The gel chromatography purification system is a method commonly used to separate and purify macromolecules (such as proteins, polysaccharides, polymers, etc.). The principle is based on the difference in molecular size. When molecules of different sizes pass through the chromatographic column filled with gel particles, they are subject to different molecular sieve effects, so as to achieve separation.

1、 Working principle

　　Gel chromatography purification systemIts core principle is that the movement of molecules in the gel filler is affected by its size. In chromatographic columns, packing particles are usually composed of micropores, whose size is fixed. When molecules pass through gel particles, they will interact with their surfaces. Larger molecules cannot enter smaller pores because of their larger volume, so they can only bypass gel particles and pass through the chromatographic column quickly. On the contrary, smaller molecules can enter the pores of gel and stay in them for a longer time, resulting in a slower flow rate. In this way, substances of different molecular sizes can be separated.

2、 Application scope

Gel chromatography purification system is widely used in many fields, especially in biochemistry, chemical engineering, environmental monitoring and material science.

1. Biochemistry and Biotechnology

Widely used for the separation and purification of biomolecules such as proteins, peptides, and nucleic acids. In the purification process of biomolecules, low molecular weight impurities such as small molecule pollutants or solvents can be efficiently removed. For protein purification, gel chromatography is one of the commonly used methods, especially when it is necessary to separate target proteins from complex biological samples, it can provide efficient separation effect.

2. Separation and Analysis of Polymers

In polymer chemistry, it is used to separate polymers of different molecular weights. In polymer production, the molecular weight distribution of the product is very important, which can help researchers analyze the molecular weight distribution and molecular structure of the polymer, ensuring the quality and performance of the polymer. Through GPC, the molecular weight distribution curve of the polymer can be obtained to evaluate its properties.

3. Environmental monitoring

In the field of environmental monitoring, it is used for the analysis of pollutants in water or soil samples. Especially when detecting organic pollutants in water (such as polycyclic aromatic hydrocarbons, chlorinated organic compounds, etc.), it can help separate pollutants of different molecular weights and perform quantitative detection through subsequent analytical instruments.

Through its separation principle based on molecular size, gel chromatography purification system has become an important separation and purification tool in many industries, especially in biochemistry, material science, environmental monitoring, pharmaceutical and other fields. By further optimizing its operating conditions, it is expected to achieve greater improvements in separation efficiency and application scope.