Extraction articles and methods
Assignee3M Innovative Properties Company
InventorsCraig A. Perman, Taib K. Ansera, Eric E. Wisted, Michael R. Berrigan, Jason R. Jacobson, Glen H. Bayer, Jr.
Life of this patent
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Abstract
This invention provides a one-piece multilayer article for use in solid phase extraction that includes at least two porous support layers and a solid phase extraction medium, wherein the porous support layers are thermo-mechanically attached at at least one thermo-mechanical attachment site. At least one of the porous support layers can be a prefilter layer.
Claims38
A one-piece multilayer solid phase extraction article comprising
- a) a first porous support layer,
- b) a second porous support layer attached at least one thermo-mechanical attachment site to said first porous layer, and
- c) a layer of solid phase extraction medium disposed between, and in intimate contact with, the first and second porous support layers such that a portion of the solid phase extraction medium is bound within the thermo-mechanical attachment site.
A method of extracting an analyte from a sample comprising
- a) providing a one-piece multilayer solid phase extraction article comprising
- i) a first porous support layer,
- ii) a second porous support layer attached to said first porous support layer at at least one thermo-mechanical attachment site, and
- iii) a layer of solid phase extraction medium disposed between, and in intimate contact with, the first and second porous support layers such that a portion of the solid phase extraction medium is bound within the thermo-mechanical attachment site;
- and
- b) passing the sample through said one-piece multilayer solid phase extraction article.
A method of thermo-mechanically making a one-piece multilayer extraction article comprising:
- a) stacking a first porous support layer, a second porous support layer, and a layer of solid phase extraction medium therebetween;
- b) positioning said stack of layers in an ultrasonic welder, said welder comprising an anvil and an ultrasonic horn;
- and
- c) pinching said stack of layers between said anvil and said horn to form at least one thermo-mechanical attachment site between said first and second porous support layers, wherein at least a portion of the solid phase extraction medium is bound within said thermo-mechanical attachment site.
Dependencies are inferred from the claim text.