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Chromatographic Separation Apparatus
5,641,893 issued 6/24/97
Inventors: Penn, Lynn S. / Weetall, Howard H. / McCurley, Marian / Plant, Anne L. / Scott, Donna / Glazier, Scott

Full Patent Text Including Drawings

Abstract

An apparatus for the monitoring of a column chromatography separation process includes a segmented column with a seal positioned at the joint defined by the segments of the column. A connector is provided for connecting the segments of the column together. The apparatus further includes a sensor for monitoring an analyte in an eluant within a separation zone of the column. The sensor includes a mesh grid made of optical fibers or metal wires which is placed so as to extend through the separation zone of the column. The metal wires or optical fibers extend through the seal of the joint in the segmented column and connect to signal processing and data analysis equipment for purposes of monitoring the movements and concentration of an analyte in an eluant at various locations within the column. Certain segments of the optical fibers or metal wires which make up the mesh grid are coated so as to be desensitized and other segments are uncoated for sensing the analyte. This provides an effective apparatus to monitor in detail the cross-section of a column chromatography process in-situ.

Claims

We claim:
1. A chromatographic separation apparatus comprising:
a column having first and second segments defining a separation zone;
a seal for sealing a joint defined between said first and second segments;
a sensor for monitoring an analyte in a solution extending through said joint into said separation zone, said sensor including a mesh grid extending across said separation zone; and
a connector for connecting said first and second segments around said sensor so that said seal seals said joint.
2. The chromatographic separation apparatus as set forth in claim 1, wherein said column contains a packing medium.
3. The chromatographic separation apparatus as set forth in claim 2, further including first and second flow adapters connected to opposing ends of said column, said first and second flow adapters including a means for selectively positioning said separation zone within said column.
4. The chromatographic separation apparatus as set forth in claim 3, wherein said first flow adaptor includes an entry port for delivering said analyte in solution and an eluant to said separation zone and a body for sealing a first end of said column.
5. The chromatographic separation apparatus as set forth in claim 4, wherein said second flow adaptor includes an exit port for discharging said analyte, solution and eluant from said column and a body for sealing a second end of said column.
6. The chromatographic separation apparatus as set forth in claim 5, wherein said sensor includes a mesh grid extending across said separation zone of said column and means for analyzing data obtained while monitoring said analyte.
7. The chromatographic separation apparatus as set forth in claim 6, wherein said mesh grid has spatially arranged segments with some of said segments coated so as to be desensitized to said analyte while other of said segments are uncoated and sense the presence of said analyte.
8. The chromatographic separation apparatus as set forth in claim 7, further including metal wires which form said mesh grid, said metal wires extending through said seal at said joint of said first and second segments for connection to said means for analyzing data, said means for analyzing data including a potentiostat for applying a voltage and an ammeter for measuring resulting current.
9. The chromatographic separation apparatus as set forth in claim 7, further including metal wires which form said mesh grid, said metal wires extending through said seal at said joint of said first and second segments for connection to said means for analyzing data, said means for analyzing data including a potentiometer for applying a voltage and an ammeter for measuring resulting current.
10. The chromatographic separation apparatus as set forth in claim 7, further including optical fibers which form said mesh grid, said optical fibers extending thorough said seal at said joint of said first and second segments for connection to said means for analyzing data, said means for analyzing data including a light source and a light detector.
11. The chromatographic separation apparatus as set forth in claim 6, further including metal wires which form said mesh grid, said metal wires extending through said seal at said joint of said first and second segments for connection to said means for analyzing data, said means for analyzing data including a potentiostat for applying a voltage and an ammeter for measuring resulting current.
12. The chromatographic separation apparatus as set forth in claim 6, further including metal wires which form said mesh grid, said metal wires extending through said seal at said joint of said first and second segments for connection to said means for analyzing data, said means for analyzing data including a potentiometer for applying a voltage and an ammeter for measuring resulting current.
13. The chromatographic separation apparatus as set forth in claim 6, further including optical fibers which form said mesh grid, said optical fibers extending through said seal at said joint of said first and second segments for connection to said means for analyzing data, said means for analyzing data including a light source and a light detector.
14. The chromatographic separation apparatus as set forth in claim 1, further including first and second flow adapters connected to opposing ends of said column, said first and second flow adapters defining a means for selectively positioning said separation zone within said column.
15. The chromatographic separation apparatus as set forth in claim 14, wherein said first flow adapter includes an entry port for delivering said analyte in solution and an eluant to said separation zone and a body for sealing a first end of said column.
16. The chromatographic separation apparatus as set forth in claim 15, wherein said second flow adapter includes an exit port for discharging said analyte, solution and eluant from said column and a body for sealing a second end of said column.
17. The chromatographic separation apparatus as set forth in claim 16, wherein said sensor includes means for analyzing data obtained while monitoring said analyte.
18. The chromatographic separation apparatus as set forth in claim 17, wherein said mesh grid has spatially arranged segments with some of said segments coated so as to be desensitized to said analyte while other of said segments are uncoated and sense the presence of said analyte.
19. The chromatographic separation apparatus as set forth in claim 18, further including metal wires which form said mesh grid, said metal wires extending through said seal at said joint of said first and second segments for connection to said means for analyzing data, said means for analyzing data including a potentiostat for applying a potential and an ammeter for measuring resulting current.
20. The chromatographic separation apparatus as set forth in claim 18, further including metal wires which form said mesh grid, said metal wires extending through said seal at said joint of said first and second segments for connection to said means for analyzing data, said means for analyzing data including a potentiometer for applying a voltage and an ammeter for measuring resulting current.
21. The chromatographic separation apparatus as set forth in claim 18, further including optical fibers which form said mesh grid, said optical fibers extending thorough said seal at said joint of said first and second segments for connection to said means for analyzing data, said means for analyzing data including a light source and a light detector.
22. The chromatographic separation apparatus as set forth in claim 17, further including metal wires which form said mesh grid, said metal wires extending through said seal at said joint of said first and second segments for connection to said means for analyzing data, said means for analyzing data including a potentiostat for applying a potential and an ammeter for measuring resulting current.
23. The chromatographic separation apparatus as set forth in claim 17, further including metal wires which form said mesh grid, said metal wires extending through said seal at said joint of said first and second segments for connection to said means for analyzing data, said means for analyzing data including a potentiometer for applying a voltage and an ammeter for measuring resulting current.
24. The chromatographic separation apparatus as set forth in claim 17, further including optical fibers which form said mesh grid, said optical fibers extending thorough said seal at said joint of said first and second segments for connection to said means for analyzing data, said means for analyzing data including a light source and a light detector.