Sheet materials for solid phase extractions and solid phase reactions
AssigneeMinnesota Mining and Manufacturing Company
InventorsDonald F. Hagen, Simon S. Fung, Paul E. Hansen
Life of this patent
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Abstract
A sheet article for solid phase extraction or solid phase reaction comprises at least one sorptive polymer pulp, and optionally at least one of sorptive and reactive particulate. The article can be used in a method of separating an analyte from a fluid comprising the step of passing a fluid comprising an analyte through a sheet article comprising poly(p- or m-phenylenephthalamide) pulp, the pulp optionally having incorporated therein solid phase particulates, the sheet article being capable of isolating the analyte from the fluid.
Claims25
A method comprising the step of passing a fluid containing an analyte through a solid phase extraction or reaction sheet article comprising at least one sorptive polymer pulp which is substantially nonswellable, and at least one of sorptive and reactive particulates enmeshed therein, said polymer pulp being selected from the group consisting of 1) aramid pulp or derivatives thereof, 2) a blend of aramid pulp or a derivative thereof with polyolefin pulp or polyacrylonitrile pulp or fibrillated polytetrafluoroethylene, and 3) a blend of polyacrylonitrile pulp with polyolefin pulp, said sheet being prepared by a wet-laid process, wherein in said method said analyte becomes sorbed or reacted and becomes bound to at least one of said polymer pulp and said particulates in said sheet article.
A method of separating an analyte from a fluid comprising the step of:
- passing a fluid comprising an analyte through a sheet article comprising at least one polymer pulp and at least one of sorptive and reactive particles enmeshed therein, said polymer pulp being selected from the group consisting of 1) aramid pulp or derivatives thereof, 2) a blend of aramid pulp or a derivative thereof with polyolefin pulp or polyacrylonitrile pulp or fibrillated polytetrafluoroethylene, or 3) a blend of polyacrylonitrile pulp with polyolefin pulp, said pulp having fibers of length in the range of 0.8 to about 4.0 mm, said particulates having an average size in the range of 0.1 to 100 micrometers, said sheet being prepared by a wet-laid process, said sheet article being capable of isolating said analyte from said fluid or chemically reacting with said analyte.
A method comprising the step of passing a fluid containing an analyte through a solid phase extraction or reaction sheet article comprising a mixture of glass fibers and a least one sorptive polymer pulp which is substantially nonswellable and at least one of sorptive and reactive particulates enmeshed therein, said at least one sorptive polymer pulp being selected from the group consisting of 1) aramid pulp or derivatives thereof, 2) a blend of aramid pulp or a derivative thereof with polyolefin pulp or acrylonitrile pulp or fibrillated polytetrafluoroethylene, and 3) a blend of polyacrylonitrile pulp with polyolefin pulp, said sheet being prepared by a wet-laid process, wherein in said method said analyte becomes sorbed or reacted and becomes bound to at least one of said polymer pulp and said particulates in said sheet article.
Dependencies are inferred from the claim text.