公开(公告)号：US11448626B2

公开(公告)日：2022-09-20

申请号：US16865696

申请日：2020-05-04

Applicant: DIONEX CORPORATION

Inventor： Manikandan Jayaraman ,  Christopher A. Pohl ,  Charanjit Saini

IPC: G01N30/96 ,  B01D15/36 ,  B01J39/20 ,  B01J39/26 ,  B01J41/20 ,  B01J39/05 ,  B01J39/07 ,  B01J41/07 ,  B01D15/20 ,  B01J47/02

Abstract: An ion exchange chromatographic packing material is described that includes support resin particles and a copolymer grafted to the support resin particles. The copolymer includes polymerized functional monomers such as a first ion exchange group monomer and a second ion exchange group monomer. At a first pH, the first ion exchange group monomer is configured to have a first charge at a first pH, and the second ion exchange group monomer is configured to have a net neutral charge. At a second pH, the first ion exchange group monomer is configured to have the first charge at a second pH, and the second ion exchange group monomer is configured to have a second charge at the second pH where the first charge and second charge both have a same polarity.

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：US10773254B2

公开(公告)日：2020-09-15

申请号：US15928384

申请日：2018-03-22

Applicant: DIONEX CORPORATION

Inventor： Charanjit Saini ,  Christopher A. Pohl

IPC: B01J41/20 ,  B01J41/13 ,  B01J41/04 ,  C08J5/22 ,  B01D15/36

Abstract: An anion exchange stationary phase includes a negatively charged substrate particle, a base condensation polymer layer, a crosslinked ethanolamine condensation polymer, and a glycidol condensation layer. The crosslinked ethanolamine condensation polymer layer can be covalently attached to the base condensation polymer layer. The crosslinked ethanolamine condensation polymer layer can be formed by a condensation reaction product of a polyepoxide compound and ethanolamine. The glycidol condensation layer can be formed by the treatment of glycidol. The anion exchange stationary phase are suitable for separating a variety of haloacetic acids and common inorganic anions in a single chromatographic run in less than 20 to 30 minutes.

公开(公告)号：US10766026B2

公开(公告)日：2020-09-08

申请号：US16101264

申请日：2018-08-10

Applicant: DIONEX CORPORATION

Inventor： Charanjit Saini ,  Christopher A. Pohl

IPC: B01J41/13 ,  C08L63/00 ,  C08L79/02 ,  B01J41/20 ,  C08G59/14

Abstract: An anion exchange stationary phase includes a negatively charged substrate particle, a base condensation polymer layer, a crosslinked ethanolamine condensation polymer, and a glycidol condensation layer. The crosslinked ethanolamine condensation polymer layer can be covalently attached to the base condensation polymer layer. The crosslinked ethanolamine condensation polymer layer can be formed by a condensation reaction product of a polyepoxide compound and ethanolamine. The glycidol condensation layer can be formed by the treatment of glycidol. The anion exchange stationary phase are suitable for separating a variety of haloacetic acids and common inorganic anions in a single chromatographic run in less than 20 to 35 minutes.