Continuous electrolytically regenerated packed suppressor for ion chromatography
US6610546B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 25, 2000 |
| Grant date | Aug 26, 2003 |
| Priority date | — |
| Expiry date | May 12, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2030/965
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An electrolytic suppressor including (a) packing (a suppressor bed of ion exchange resin or a flow-through monolith), (b) an electrode chamber adjacent the suppressor, (c) a first electrode in the electrode chamber, (d) a barrier separating the packing from the first electrode chamber preventing significant liquid flow but permitting transport of ions only of the same charge as the packing, (e) a second electrode in electrical communication with the resin bed, and (f) a recycle conduit between the suppressor outlet port and said electrode chamber. Charged transverse partitions with openings may be included to create a serpentine liquid path. For anion analysis, the method of using the apparatus includes: (a) flowing an aqueous liquid sample stream containing anions to be detected and cation hydroxide through the separator bed, (b) flowing the aqueous effluent from the separator bed through the flow-through packing, (c) flowing the effluent liquid from the suppressor past a detector, (d) recycling said liquid effluent from the detector through a cathode chamber proximate to the packing and separated by the first barrier, and (e) applying an electrical potential between the cathode a…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.