Method for balancing background conductivity for ion chromatography
US4751189A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 11, 1986 |
| Grant date | Jun 14, 1988 |
| Priority date | — |
| Expiry date | Mar 11, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/255
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of ion chromatography in which the sample passes through a chromatographic column, a suppressor, and a conductivity detector, using a gradient electrolyte eluent. A non-ionic polyhydroxy compound is added with the eluent to the chromatographic column at a concentration inversely related to the concentration of the electrolyte which increases with time. The effluent is passed through a membrane suppressor for the conductivity of the electrolyte. The regenerant stream in the suppressor includes a complexing agent (boric acid) which passes through the membrane into the effluent to form highly ionized complex which counterbalances the increased background conductivity of the electrolyte to stabilize the background conductivity in the conductor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.