Column Chromatography Silica Gel - Chinaprice: contact company for price
the solvent flows down the column. If the solvent is allowed to flow
down the column by gravity, or percolation, it is called gravity column
chromatography. If the solvent is forced down the column by positive air
pressure, it is called flash chromatography, a 'state of the art' method
currently used in organic chemistry research laboratories.
Silica gel (SiO2) and alumina (Al2O3) are two adsorbents commonly used by the organic chemist for column chromatography. These adsorbents are sold in different mesh sizes, as indicated by a number on the bottle label: “silica gel 60” or “silica gel 230-400” is a couple examples. This number refers to the mesh of the sieve used to size the silica, specifically, the number of holes in the mesh or sieve through which the crude silica particle mixture is passed in the manufacturing process.
Adsorbent particle size affects how the solvent flows through the column. Smaller particles (higher mesh values) are used for flash chromatography; larger particles (lower mesh values) are used for gravity chromatography. For example, 70–230 silica gels are used for gravity columns and 230–400 mesh for flash columns.
- Posted By: Fenglong Chemical Co., Ltd
- Phone: 862045785142
- Address: jiangsu,chian, jiangsu, China
- Website: http://www.silicon-gel-china.com/
Published date: August 22, 2013 -
- Business Description: SILICA GEL supplier Fenglong Chemical Co., Ltd. is primarily engaged
in manufacturing silica gel since 2001. Our silica gel manufacturing
plant is located in Maanshan with manufacturing capacity of more than
500 MT silica gel per year. We are manufacturing Indicating silica gel &
Non Indicating type of SILICA GEL in all grades such as blue silica gel,
orange silica gel and basic silica gel such as type A silica gel , type
B silic gel ,type C silica gel and another special silica gel Column
chromatography silica gel
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