Dionex Corporation

Zhongqing Lu

Yan Liu

Christopher A Pohl

Kannan Srinivasan

Sheetal Bhardwaj

Hamish Small

Rong Lin

Michael John McAdams

Jun Cheng

Jinhua Chen

Khosro Moshfegh

Milton Liu

Angelo Rubero

Michael Mcadams

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.

Configuration for ultra high pressure electrolytic eluent generators

A chromatographic method including chromatographically separating sample ionic species in an eluent stream, detecting the separated sample ionic species, catalytically combining hydrogen and oxygen gases or catalytically decomposing hydrogen peroxide in a catalytic gas elimination chamber, and recycling the effluent stream from the chamber to the chromatography separation column. The residence time between the detector and the chamber is at least about one minute. Also, flowing the recycle sequentially through two detector effluent flow channels of an electrolytic membrane suppressor. Also, applying heat or UV energy between the detector and the chamber. Also, detecting bubbles after the chamber. Also, a Platinum group metal catalyst and ion exchange medium in the chamber. Apparatus for performing the methods.

Ion chromatography systems with flow-delay eluent recycle

A degas assembly including a low pressure fluid channel for carrying a wash fluid at a first pressure, a pressurized channel for carrying eluent including a gas at a second pressure higher than the first pressure, and a degas separator defining a fluid barrier between the low pressure fluid channel and pressurized fluid channel, the separator configured to retain liquid in the pressurized fluid channel and allow gas to flow through the separator to the low pressure fluid channel. The pressurized fluid channel may extend along an outer periphery of the low pressure fluid channel. The eluent may be received from an eluent generator at a pressure of at least about 3300 psi, and in various embodiments up to about 5000 psi. A liquid chromatography system and method are also disclosed.

High pressure degas assembly for chromatography system and method

Ion chromatography system with flow-delay eluent recycle

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Fremont, CA, United States of America

Zhongqing Lu