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    HYDROLYTICALLY STABLE ZWITTERIONIC CHROMATOGRAPHIC MATERIALS
    1.
    发明申请
    HYDROLYTICALLY STABLE ZWITTERIONIC CHROMATOGRAPHIC MATERIALS 有权

    公开(公告)号：US20220362741A1

    公开(公告)日：2022-11-17

    申请号：US17731952

    申请日：2022-04-28

    申请人： Waters Technologies Corporation

    发明人： Nicole L. Lawrence ,  Darryl W. Brousmiche ,  Jessica Field ,  Daniel P. Walsh

    IPC分类号： B01J20/26 ,  B01D15/36 ,  B01J20/28 ,  B01J43/00

    摘要： In some aspects, the present disclosure pertains to chromatographic materials that comprise (a) a bulk material and (b) a zwitterionic polymer covalently linked to a surface of the bulk material, in which the zwitterionic polymer comprises one or more monomer residues that comprise an amide or urea moiety, a positively charged moiety, and a negatively charged moiety. Other aspects of the present disclosure pertain to chromatographic separation devices that comprise such chromatographic materials, to chromatographic methods that employ such chromatographic separation devices, and to kits that contain (i) such chromatographic materials and (ii) one or more chromatographic devices for containing such materials.

    Functionalized substrates with ion-exchange properties
    7.
    发明授权
    Functionalized substrates with ion-exchange properties 有权
    具有离子交换性能的功能化底物

    公开(公告)号：US09314712B2

    公开(公告)日：2016-04-19

    申请号：US12118447

    申请日：2008-05-09

    申请人： Xiaodong Liu ,  Christopher A. Pohl ,  Jinhua Chen ,  L. Andy Woodruff

    发明人： Xiaodong Liu ,  Christopher A. Pohl ,  Jinhua Chen ,  L. Andy Woodruff

    IPC分类号： B01D15/36 ,  B01D15/32 ,  B01J20/28 ,  B01J20/32 ,  B01J39/26 ,  B01J43/00 ,  B01D15/38

    CPC分类号： B01D15/362 ,  B01D15/325 ,  B01D15/361 ,  B01D15/363 ,  B01D15/3847 ,  B01J20/28097 ,  B01J20/3221 ,  B01J20/3285 ,  B01J20/3295 ,  B01J39/26 ,  B01J43/00 ,  B01J41/20

    摘要： The current invention provides compositions, which are useful as stationary phases for a variety of chromatographic applications, such as high performance liquid chromatography (HPLC) and solid-phase extraction (SPE). The compositions include a porous solid support (e.g., silica gels, silica monoliths or synthetic organic resins) having an exterior surface and pore openings defined by “interior walls”. To the solid support are covalently bound organic ion-exchange ligands (e.g., silyl ligands), which incorporate at least one ion-exchange group (e.g., ionic or ionizable group). The compositions further include micro-particles (e.g., latex particles) incorporating ion-exchange groups having a charge that is opposite to the charge found on the support. The micro-particles are bound to the exterior surface of the support (e.g., via electrostatic forces). The micro-particles have a size that is sufficient to minimize the number of particles that can enter the pores of the support thereby reducing or essentially preventing binding of the micro-particles to the interior walls of the pores. While the pores are essentially too small for the micro-particles, they can still be accessed by the analytes present in a chromatographic sample. The physical separation of ion-exchange groups located within the pores and the surface of the micro-particles, respectively, prevents reactions (e.g., formation of salt-bridges) between the oppositely charged groups and provides compositions with both anion-exchange and cation-exchange capabilities within the same stationary phase. The ligands bound to the solid support can optionally include additional (e.g., reverse-phase) functionalities creating multi-modal (e.g., trimodal) stationary phases.

    摘要翻译： 本发明提供了用于各种色谱应用的固定相的组合物，例如高效液相色谱（HPLC）和固相萃取（SPE）。 组合物包括具有由“内壁”限定的外表面和孔开口的多孔固体支持物（例如硅胶，二氧化硅整料或合成有机树脂）。 固体支持物是共价结合的有机离子交换配体（例如，甲硅烷基配体），其结合至少一个离子交换基团（例如离子或可离子化基团）。 组合物还包括结合离子交换基团的微粒（例如胶乳颗粒），其具有与载体上发现的电荷相反的电荷。 微粒子结合到支撑体的外表面（例如通过静电力）。 微粒具有足以使能够进入载体的孔的颗粒数量最小化的尺寸，从而减少或基本上防止微粒与孔内壁的结合。 虽然孔对于微粒基本上太小，但是它们仍然可以通过色谱样品中存在的分析物进行访问。 分别位于孔和微粒表面之间的离子交换基团的物理分离防止相反电荷基团之间的反应（例如，形成盐桥），并提供具有阴离子交换和阳离子交换的组合物， 交换能力在同一个固定阶段。 与固体支持物结合的配体可以任选地包括产生多模态（例如，三峰）固定相的另外的（例如反相）官能团。