Dionex Corporation

Victor M Barreto

Christopher A Pohl

Yan Liu

John R Stillian

Gary L Gleave

Glenn Masami Kuse

Steven B Rabin

Khosro Moshfegh

Keith A Friedman

William Dale Case

Mahmood Toofan

Michael John Mcadams

A method of streamlining and lowering the cost of operation of ion chromatography as well as improving detection limits is disclosed. The apparatus includes chromatographic separating means through which a sample is eluted in an eluent solution including an electrolyte. The apparatus includes suppressor means having a chromatography effluent compartment means separated from a detector effluent compartment means by an ion exchange membrane, forming a chromatography effluent flow channel and a detector effluent channel, respectively. Electrode means are disposed in communication with both flow channels for passing an electric current transverse to the solution that is passing through them. The chromatography effluent flows through the chromatography effluent flow channel of the suppressor and through detector means which detects resolved ionic species therein. The effluent from the detector means is then recycled through the detector effluent flow channel and forms a sump for electrolyte ions passing across the chromatography effluent as well as supplying the water for the electrolysis reaction generating acid (or base) for suppression.

Ion chromatography system using electrochemical suppression and detector

Growing community of inventors

Santa Clara, CA, United States of America

Victor M Barreto