Ligand compositions and stationary phases comprising polyhedral oligomeric silsesquioxane moieties are incorporated in to chromatographic stationary phases, and these phases are incorporated into chromatography devices, such as columns. The compositions and devices are of use to separate molecular mixtures.

Disclosed in certain embodiments are carbon dioxide and VOC sorbents that include a porous support impregnated with an amine compound.

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.

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 high purity chromatographic materials comprising a chromatographic surface wherein the chromatographic surface comprises a hydrophobic surface group and one or more ionizable modifier.

An adsorbent article for CO.sub.2 capture and methods of making the same. The adsorbent article for CO.sub.2 capture includes a ceramic substrate, a plurality of inorganic support particles, and an organic CO.sub.2 sorbent on the support particles. The ceramic substrate includes a plurality of porous partitions walls that define a plurality of open channels extending from an inlet end to an outlet end of the ceramic substrate. The organic CO.sub.2 sorbent is supported by the inorganic support particles within the pores of porous partition walls of the ceramic substrate. The surfaces of the porous partition walls surfaces defining the open channels are essentially free of the organic CO.sub.2 sorbent.

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.

Metal-containing sorbent materials are provided, methods of making the metal-containing sorbent materials, methods of using the metal-containing sorbent materials, and metal complex-containing composite materials resulting from the sorption of basic, nitrogen-containing compounds on the metal-containing sorbent materials are provided. The sorbent materials are prepared by incorporating divalent metals into a precursor material that is formed by treating a porous siliceous material having mesopores with a silane or disilazane surface treatment agent. The metal-containing sorbent materials can be used to capture basic, nitrogen-containing compounds having a molecular weight no greater than 150 grams/mole.

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 high purity chromatographic materials comprising a chromatographic surface wherein the chromatographic surface comprises a hydrophobic surface group and one or more ionizable modifier

The method relates to the modification of mineral adsorbent particularly halloysite in the form of clay or tube using dendritic polymer for treating wastewater containing ionic or nonionic water pollutants such as heavy metal ions, dyes, surfactants, high molecular weight coagulants and mineral oils. The method will increase surface activity of the adsorbent and can be applied to create positive or negative charges on the surface of the adsorbent. The modified mineral can be used as: adsorbent of pollutant such as dye, heavy metal ion, aromatic material from aqueous solutions, for removal of cations from aqueous solutions, for removal of anions from aqueous solutions, as filler in nano-composite, as nano-particle in polymeric membrane, adsorbent for soil, and special pharmaceutical application.

The present invention relates to a method for measuring a polymer modification ratio, and more particularly, to a method for measuring a polymer modification ratio, which includes preparing a first solution by dissolving a polymer mixture containing a modified polymer and an unmodified polymer in a first solvent, injecting the first solution into a column filled with an adsorbent, adsorbing the modified polymer onto the adsorbent, and eluting the first solution in which the unmodified copolymer is dissolved, transferring the eluted first solution to a detector, injecting a second solvent into the column to elute the second solution in which the adsorbed modified polymer is dissolved, and transferring the eluted second solution to the detector.