公开(公告)号：US20240198255A1

公开(公告)日：2024-06-20

申请号：US18067711

申请日：2022-12-18

Applicant: DIONEX CORPORATION

Inventor： John Edward Madden ,  Charanjit Saini ,  Yan Liu

IPC: B01D15/36 ,  B01J39/05

CPC classification number: B01D15/364 ,  B01J39/05

Abstract: A method comprising separating a plurality of arsenic species using a mixed mode column and a strong acid. The plurality of arsenic species includes at least one of each of an anionic arsenic species, a cationic arsenic species, a neutral arsenic species, and a zwitterionic arsenic species.

公开(公告)号：US10175211B2

公开(公告)日：2019-01-08

申请号：US14587780

申请日：2014-12-31

Applicant: DIONEX CORPORATION

Inventor： Kannan Srinivasan ,  Rong Lin ,  Christopher A. Pohl ,  John Edward Madden

IPC: G01N30/96 ,  B01D15/08 ,  B01D15/36 ,  B01D61/46 ,  B01D61/52 ,  B01J39/26 ,  B01J41/20 ,  B01J47/04 ,  B01J20/281 ,  G01N30/00 ,  G01N30/02

Abstract: An apparatus for treating an aqueous sample stream includes analyte ions. The apparatus comprises an ion exchange barrier; a sample stream flow channel; an ion receiving stream flow channel adjacent to the sample stream flow channel and separated therefrom by said first ion exchange bather. Stationary flow-through ion exchange packing is disposed in the sample flow channel of the same charge as the ion exchange bather. The ion exchange packing comprises a mixture of a first ion exchange portion with strong ionizable groups and a second ion exchange portion with weak ionizable groups of the same charge. First and second electrodes are in electrical communication with the sample stream flow channel and ion receiving flow channel.