Claims
- 1. A solid phase extraction plate comprising:a unitary tray having a plurality of spaced apart discrete upstanding chambers molded therein, each chamber having a top opening and a bottom nozzle; a plurality of solid phase extraction disks, each one of the plurality of disks being sized for press fitting between sidewalls of one of the plurality of chambers proximate the bottom nozzle in order to hold the disks within the chambers by frictional engagement with the sidewalls, each disk comprising an extraction medium and silica gel in glass fibers; and fritless means for enabling each disk to be press fit into a corresponding chamber, said fritless means comprising tapered sidewalls in each chamber.
- 2. The solid phase extraction plate according to claim 1 wherein each of the chambers has a circular cross section.
- 3. The solid phase extraction plate according to claim 1 further comprising means for spacing each disk from a corresponding nozzle.
- 4. The solid phase extraction plate according to claim 2 wherein the means for spacing comprises a step formed in the sidewall proximate the corresponding nozzle.
- 5. The solid phase extraction plate according to claim 1 wherein each of the plurality of chambers are identical to one another.
- 6. The solid phase extraction plate according to claim 1 wherein same said disk comprises a non-polar extraction medium.
- 7. The solid phase extraction plate according to claim 1 wherein each said disk comprises a polar extraction medium.
- 8. The solid phase extraction plate according to claim 1 wherein each said disk comprises a cation exchange medium.
- 9. The solid phase extraction plate according to claim 1 wherein each said disk comprises an anion exchange medium.
- 10. The solid phase extraction plate according to claim 1 wherein each said disk comprises both a non-polar/strong cation medium and a polar/strong cation medium.
- 11. The solid phase extraction plate according to claim 1 wherein the disks each comprises at least one medium selected from a group consisting of a non-polar medium, a polar medium, a cation exchange medium and an anion exchange medium.
- 12. The solid phase extraction plate according to claim 1 wherein the disks each comprise different mediums selected from a group consisting of a non-polar medium, a polar medium, a cation exchange medium and an anion exchange medium.
- 13. The solid phase extraction plate according to claim 1 wherein at least one of the disks comprises two mediums selected from a group consisting of a non-polar medium, a polar medium, a cation exchange medium and an anion exchange medium.
- 14. A solid phase extraction plate comprising:a unitary tray having a plurality of spaced apart discrete upstanding chambers molded therein, each chamber having a top opening and a bottom nozzle; a plurality of solid phase extraction disks, each one of the plurality of disks being sized for press fitting between sidewalls of one of the plurality of chambers proximate the bottom nozzle in order to hold the disks within the chambers by frictional engagement with the sidewalls, each disk comprising an extraction medium and silica gel in glass fibers, at least two disks being disposed in each chamber; and fritless means for enabling each disk to be press fit into a corresponding chamber, said fritless means comprising tapered sidewalls in each chamber.
- 15. The solid phase extraction plate according to claim 14 wherein the at least two disks in each chamber comprise different extraction mediums selected from a group consisting of a non-polar medium, a polar medium, a cation medium and an anion medium.
- 16. The solid phase extraction plate according to claim 14 wherein each of the chambers has a circular cross section.
- 17. The solid phase extraction plate according to claim 14 further comprising means for spacing each disk from a corresponding nozzle.
- 18. The solid phase extraction plate according to claim 17 wherein the means for spacing comprises a step formed in the sidewall proximate the corresponding nozzle.
- 19. The solid phase extraction plate according to claim 14 wherein each of the plurality of chambers are identical to one another.
Parent Case Info
This application is a continuation-in-part of U.S. patent application Ser. No. 08/905,811 filed Aug. 4, 1997, now U.S. Pat. No. 5,906,796.
US Referenced Citations (11)
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
08/905811 |
Aug 1997 |
US |
Child |
09/217726 |
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US |