Silica gel powder is a colloidal system with solid characteristics, composed of colloidal particles that form an agglomerated structure. Colloidal particles are condensation polymers of hydrated silica gel, which are amorphous substances. The gaps of the aggregates of colloidal particles form the microporous structure inside the silica gel particles for reagent column chromatography. Therefore, it is a high-quality adsorption material with rich microporous structure, high specific surface area, high purity and high activity.
Silica gel powder has good thermal stability and chemical stability. It can selectively adsorb and purify isomer components from multi-component solutions. In the process of preparing silica gel powder, a series of products with an average pore diameter of 20A°-20000A° can be produced by controlling different process conditions to adapt to the separation and purification of substances with different properties, molecular weights and molecular structures. The purity of silica gel powder is as high as 99%. Compared with organic column packing, silica gel is a solid colloid with SiO2 as the matrix, and has a compact structure. Even if it is directly discarded, organic matter will be lost and the target product will be contaminated.
