Abstract:
The present disclosure relates to a method of separating a compound of interest, particularly unsaturated compound(s) of interest, from a mixture. The compound is separated using a column having a chromatographic stationary phase material for various different modes of chromatography containing a first substituent and a second substituent. The first substituent minimizes compound retention variation over time under chromatographic conditions. The second substituent chromatographically and selectively retains the compound by incorporating one or more aromatic, polyaromatic, heterocyclic aromatic, or polyheterocyclic aromatic hydrocarbon groups, each group being optionally substituted with an aliphatic group.
Abstract:
In einem Aspekt stellt die vorliegende Erfindung ein chromatographisches stationäre Phasen-Material für verschiedene Chromatographie-Methoden bereit, dargestellt durch die Formel 1: [X](W)a(Q)b(T)c (Formel 1). X kann eine hochreine chromatographische Kernzusammensetzung sein, umfassend Kieselerde-Kernmaterial, Metalloxid-Kernmaterial, ein anorganisch-organisches Hybridmaterial oder eine Gruppe von Blockcopolymeren davon. W kann fehlen und/oder kann einen Wasserstoff umfassen und/oder kann Hydroxyl an der Oberfläche von X umfassen. Q kann eine funktionelle Gruppe sein, die die Retentionsschwankung im zeitlichen Verlauf (Drift) unter chromatographischen Bedingungen bei Verwendung von geringen Wasserkonzentrationen minimiert. T kann eine oder mehrere hydrophile, polare, ionisierbare und/oder geladene funktionelle Gruppen umfassen, die mit dem Analyten chromatographisch interagieren. Außerdem können b und c positive Zahlen sein, wobei das Verhältnis 0,05 ≤ (b/c) ≤ 100 lautet und a ≥ 0.
Abstract:
In one aspect, the present invention provides a chromatographic stationary phase material for various different modes of chromatography represented by Formula 1:[X](W)a(Q)b(T)c (Formula 1). X can be a high purity chromatographic core composition having a surface comprising a silica core material, metal oxide core material, an inorganic-organic hybrid material or a group of block copolymers thereof. W can be absent and/or can include hydrogen and/or can include a hydroxyl on the surface of X. Q can be a functional group that minimizes retention variation over time (drift) under chromatographic conditions utilizing low water concentrations. T can include one or more hydrophilic, polar, ionizable, and/or charged functional groups that chromatographically interact with the analyte. Additionally, b and c can be positive numbers, with the ratio 0.05 = 0.
Abstract:
The present disclosure relates to a method of separating a compound of interest, particularly unsaturated compound(s) of interest, from a mixture. The compound is separated using a column having a chromatographic stationary phase material for various different modes of chromatography containing a first substituent and a second substituent. The first substituent minimizes compound retention variation over time under chromatographic conditions. The second substituent chromatographically and selectively retains the compound by incorporating one or more aromatic, polyaromatic, heterocyclic aromatic, or polyheterocyclic aromatic hydrocarbon groups, each group being optionally substituted with an aliphatic group.
Abstract:
In one aspect, the present invention provides a chromatographic stationary phase material for various different modes of chromatography represented by Formula 1:[X](W)a(Q)b(T)c (Formula 1). X can be a high purity chromatographic core composition having a surface comprising a silica core material, metal oxide core material, an inorganic-organic hybrid material or a group of block copolymers thereof. W can be absent and/or can include hydrogen and/or can include a hydroxyl on the surface of X. Q can be a functional group that minimizes retention variation over time (drift) under chromatographic conditions utilizing low water concentrations. T can include one or more hydrophilic, polar, ionizable, and/or charged functional groups that chromatographically interact with the analyte. Additionally, b and c can be positive numbers, with the ratio 0.05 ≤ (b/c) ≤ 100, and a ≥ 0.
Abstract:
In one aspect, the present invention provides a chromatographic stationary phase material for various different modes of chromatography represented by Formula 1: [X](W)a(Q)b(T)c (Formula 1). X can be a high purity chromatographic core composition having a surface comprising a silica core material, metal oxide core material, an inorganic-organic hybrid material or a group of block copolymers thereof. W can be absent and/or can include hydrogen and/or can include a hydroxyl on the surface of X. Q can be a functional group that minimizes retention variation over time (drift) under chromatographic conditions utilizing low water concentrations. T can include one or more hydrophilic, polar, ionizable, and/or charged functional groups that chromatographically interact with the analyte. Additionally, b and c can be positive numbers, with the ratio 0.05≤(b/c)≤100, and a≥0.
Abstract:
In one aspect, the present invention provides a chromatographic stationary phase material for various different modes of chromatography represented by Formula 1:[X](W)a(Q)b(T)c (Formula 1). X can be a high purity chromatographic core composition having a surface comprising a silica core material, metal oxide core material, an inorganic-organic hybrid material or a group of block copolymers thereof. W can be absent and/or can include hydrogen and/or can include a hydroxyl on the surface of X. Q can be a functional group that minimizes retention variation over time (drift) under chromatographic conditions utilizing low water concentrations. T can include one or more hydrophilic, polar, ionizable, and/or charged functional groups that chromatographically interact with the analyte. Additionally, b and c can be positive numbers, with the ratio 0.05 ≤ (b/c) ≤ 100, and a ≥ 0.
Abstract:
Methods are provided for making rapid labeled dextran ladders and other calibrants useful in liquid chromatography. The methodologies include a two-step process comprising a reductive amination step of providing a reducing glycan and reacting it with a compound having a primary amine to produce an intermediate compound. The intermediate compound is then rapidly tagged with a rapid tagging reagent to produce the rapid labeled dextran ladder.
Abstract:
The present invention provides a chromatographic stationary phase material various different types of chromatography. One example chromatographic stationary phase is represented by Formula 1 [X](W)a(Q)b(T)c (Formula 1). X can be a high purity chromatographic core composition. W can be absent and/or can include hydrogen and/or can include hydroxyl on the surface of X. Q can be bound directly to X and can include a first hydrophilic, polar, ionizable, and/or charged functional group that chromatographically interacts with the analyte. T can be bound directly to X and can include a second hydrophilic, polar, ionizable, and/or charged functional group that chromatographically interacts with the analyte. Additionally, Q and T can essentially eliminate chromatographic interaction between the analyte, and X and W, thereby minimizing retention variation over time (drift or change) under chromatographic conditions utilizing low water concentrations.
Abstract:
The present invention provides novel chromatographic materials, e.g., for chromatographic separations, processes for its preparation and separations devices containing the chromatographic material; separations devices, chromatographic columns and kits comprising the same; and methods for the preparation thereof. The chromatographic materials of the invention are chromatographic materials comprising having a narrow particle size distribution.