Abstract: A treated silica composition particularly useful for solid phase extraction in chemical analysis, the silica having both phenyl and propylsulfonic acid functional groups; a cartridge for extraction which comprises the treated silica; a column for extraction which comprises the treated silica; and a method for solid phase extraction which uses the silica composition. A method for analysis of gamma hydroxybutyric acid is also disclosed which uses the treated silica.
Type:
Grant
Filed:
January 4, 1999
Date of Patent:
December 5, 2000
Assignee:
United Chemical Technologies, Inc.
Inventors:
Chester J. Kitchen, Thomas F. August, William L. Ozanich, Michael J. Telepchak
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