Standard for the testing of chromatographic plates1. Coating thickness:The analysis plate shall not be less than 0.2mm, and the preparation plate shall not be less than 0.4mm or 0.9mm2, bonding fastness:With n-butanol: glacial acetic acid: water = 4:1:1 as the developing agent, the coating was repea Read More

Silica gel introduction: Silica gel is a kind of highly active adsorption material, the main component is silica (SiO2), is an amorphous substance, its chemical formula is mSiO2. nH2O. It is usually made by the reaction of sodium silicate and sulfuric acid, and a series of post-treatment processes s Read More

Explanation (1)Sieve diameter (μm)≈14832.4/ mesh number of sieveUnit size refers to the size of raw material particles, generally expressed by the maximum length of particles. Mesh is the size of the mesh size of a standard screen. In the Taylor standard sieve, the mesh is the number of screens in t Read More