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US 6,713,033 B2Granted
Process for producing hydrophilic ODS packing material made of silica gel
AssigneeKanto Kagaku Kabushiki Kaisha
InventorsYoshihiro Sakai, Yutaka Sawada, Norihiro Omori, Suzue Ota
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Abstract
A process for the production of a highly chemically stable hydrophilic ODS packing material made of silica gel for liquid chromatography that causes hardly any peak tailing. ODS groups are chemically bonded to a silica gel having a specific surface area of 200 to 300 m2/g, which is then subjected once or twice to end capping including high temperature end capping so as to efficiently remove or deactivate active silanol groups.
Claims5
A process for the production of an ODS packing material made of silica gel comprising steps of:
- chemically bonding ODS groups to a silica gel having a specific surface area of 200 to 300 m2/g;
- and then
- deactivating the remaining active silanol groups by high temperature end capping.
Dependencies are inferred from the claim text.