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US 2025/0198019 A1Published application
Configuration for ultra high pressure electrolytic eluent generators
AssigneeDionex Corporation
InventorsZhongqing Lu, Angelo Rubero, Yan Liu, Rong Lin
Life of this patent
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Abstract
An electrolytic eluent generator includes an electrolyte reservoir and at least one eluent generation cartridge. The electrolyte reservoir includes a chamber containing an aqueous electrolyte solution; and a first electrode. The at least one eluent generation cartridge includes a platinum mesh electrode; a polymer screen; a plurality of reinforced membranes; a membrane washer; and a spacer including a central post and an annular projection.
Claims20
An ion chromatography system comprising:
- a pump;
- a chromatographic separation column;
- a detector;
- and
- an electrolytic eluent generator comprising:
- an electrolyte reservoir including:
- a chamber containing an aqueous electrolyte solution;
- and
- a first electrode;
- at least one eluent generation cartridge including:
- a platinum mesh electrode;
- a polymer screen;
- a plurality of reinforced membranes;
- a membrane washer including at least one ion exchange membrane;
- and
- a spacer including a central post and an annular projection,
- wherein the membrane washer is deformable into an annular space between the annular projection and the central post during compression such that a gap is formed between the membrane washer and the adjacent ion exchange membrane.
14 more elements
A method of preparing an eluent for an ion chromatography system:
- suppling a liquid to an electrolytic eluent generator, the electrolytic eluent generator including an electrolyte reservoir and at least one eluent generation cartridge, the electrolyte reservoir including a chamber containing an aqueous electrolyte solution and a first electrode, the at least one eluent generation cartridge including a second electrode, a plurality of reinforced membranes, a membrane washer including at least one ion exchange membrane, and a spacer including a central post and an annular projection, wherein the membrane washer is deformable into an annular space between the annular projection and the central post during compression such that a gap is formed between the membrane washer and the adjacent ion exchange membrane;
- apply a current between the first electrode and the second electrode to cause the migration of ions from the electrolyte reservoir, through the at least one ion exchange membrane, and into the liquid to form an eluent;
- and
- providing the eluent to a chromatographic separation column.
1 more element
Dependencies are inferred from the claim text.