Chemistry: electrical and wave energy – Apparatus – Coating – forming or etching by sputtering
Patent
1990-08-21
1992-02-04
Niebling, John
Chemistry: electrical and wave energy
Apparatus
Coating, forming or etching by sputtering
2041828, 2041833, 204301, G01N 2726
Patent
active
050857568
ABSTRACT:
Capillary tubes useful for performing capillary zone electrophoresis separation techniques are modified to provide sample pre-treatment in situ. In one preferred embodiment, a polyacrylamide stacking gel is formed in a capillary tube and separated from the free zone of the tube by a polystyrene frit. The modified capillary permits effective filtration of macromolecules from analysis or their retardation to allow for sequential analysis.
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Hewlett--Packard Company
Niebling John
Ryser David G.
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