Dionex Corporation

Other

Mrinal Sengupta

Kannan Srinivasan

Christopher A Pohl

Yan Liu

Nebojsa Avdalovic

Gary L Gleave

Sm Rahmat Ullah

Michael J Silvers

Kerry Prowse

Andres R Honegger

Kevin Shin

Chromatography case

Systems and methods for inhibiting translocation of ions across ion exchange barriers include an eluent generator having an ion source reservoir with a first electrode, an eluent generation chamber with a second electrode, an ion exchange barrier disposed therebetween, and means for reversing the polarity of a voltage or current applied across the first and second electrodes. A first polarity voltage or current applied across the electrodes generates an electric field that promotes translocation of eluent counter ions from the reservoir across the barrier, where the counter ions combine with eluent ions electrolytically generated in the chamber. By reversing the polarity of the voltage or current across the electrodes, the resulting electric field inhibits translocation of counter ions across the barrier from the reservoir into the chamber. Reverse voltage or current bias reduces counter ion concentration in the resting chamber to prevent exhaustion of ion suppressor capacity during start up.

Fast startup ion chromatography system and methods

An in-line electrolytic reagent concentrator device that circumvents the need for additional pumps and supplies of reagents to support operation of a carbonate or ammonia removal device. The device generates regenerant solutions as strong as, or even stronger, than commercially recommended regenerant solutions. The device may also regenerate eluent solutions so as to reduce the frequency of eluent maintenance and replacement in ion chromatography systems.

Flow control in an electrolytic reagent concentrator for ion chromatography

Growing community of inventors

Fremont, CA, United States of America

Mrinal Sengupta