Liquid purification or separation – With means to add treating material – Chromatography
Reexamination Certificate
2004-04-27
2009-11-17
Fortuna, Ana M (Department: 1797)
Liquid purification or separation
With means to add treating material
Chromatography
C210S656000, C210S638000, C210S195100, C210S663000, C436S150000, C422S070000, C204S632000
Reexamination Certificate
active
07618535
ABSTRACT:
Method and apparatus for suppressed ion analysis in which a sample solution of analyte (e.g., anion) in an eluent of electrolyte counterions (e.g., sodium), is chromatographically separated. Then, the counterions are suppressed in a suppression zone and removed and used to convert the analyte ions to salt form in a salt-converting zone. The suppression and salt-converting zones may be contiguous or remote, and may be performed in devices of the membrane suppresser type. Thereafter, the salts or acids or bases formed from them (e.g., in membrane suppressor devices) are detected. Also, salt conversion can be performed using two ion exchange packed bed salt convertors in which one bed is on-line while the other is regenerated, followed by a reversal of flow.
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Avdalovic Nebojsa
Saini Sheetal
Srinivasan Kannan
Brezner David J.
Dionex Corporation
Fortuna Ana M
Morgan & Lewis & Bockius, LLP
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