Abstract: The invention relates to a polymeric material comprising crosslinked spherical particles that are obtained by photoinitiated precipitation polymerization of crosslinking monomer and optionally a further monomer in the presence of an initiator and a solvent. It also relates to a method for producing the material and a chromatography column containing the material.

Abstract: A novel open tube with a zwitterionic betaine polymer layer can be prepared by initiated grafting polymerization. This open tube can be used for separating inorganic anions, peptides and proteins. A capillary electrophoresis method and a capillary chromatography method use the novel open tube. There are methods for manufacturing the novel open tube.

Abstract: A porous silica particle suitable can be used in zwitterionic high performance liquid chromatography. The particle comprises covalently bound zwitterionic groups grafted through a polymerization reaction. A hydrophilic column packing material suitable for use as a stationary phase in zwitterionic high performance liquid chromatography may comprise porous silica particles. The particles may comprise covalently bound zwitterionic groups. Methods for manufacturing and applying the silica particles exist.

Abstract: The present invention provides porous monoliths with high flow permeability that can be produced by polymerising and divinylbenzene in the presence of an initiator, a carboxy-functionalized nitroxide stable free radical and polymeric porogens. The monoliths produced with these stable free radicals functionalized with carboxylic groups feature porosities very different from those produced by polymerizations involving other SFRs, characterized by very large surface areas in combination with relatively large through-pores. The invention also provides a method for producing the monoliths, a column containing the monoliths and an assay method using the column.

Abstract: A novel sorbent suitable for use as a stationary phase in a chromatography column, the core of which consists of an organic polymer of synthetic or natural origin. Further, the carrier exhibits a plurality of covalently bonded non-aromatic zwitterionic groups on its surface. Additionally, the invention also relates to a method for purifying a particular biological macromolecule, such as a protein or a nucleic acid, by zwitterionic ion exchange chromatography as well as an ion exchange column suitable for use in the zwitterionic ion exchange chromatography.

Abstract: A porous silica particle suitable can be used in zwitterionic high performance liquid chromatography. The particle comprises covalently bound zwitterionic groups grafted through a polymerization reaction. A hydrophilic column packing material suitable for use as a stationary phase in zwitterionic high performance liquid chromatography may comprise porous silica particles. The particles may comprise covalently bound zwitterionic groups. Methods for manufacturing and applying the silica particles exist.

Abstract: A novel open tube with a zwitterionic betaine polymer layer can be prepared by initiated grafting polymerization. This open tube can be used for separating inorganic anions, peptides and proteins. A capillary electrophoresis method and a capillary chromatography method use the novel open tube. There are methods for manufacturing the novel open tube.

Abstract: The present invention provides porous monoliths with high flow permeability that can be produced by polymerising and divinylbenzene in the presence of an initiator, a carboxy-functionalized nitroxide stable free radical and polymeric porogens. The monoliths produced with these stable free radicals functionalized with carboxylic groups feature porosities very different from those produced by polymerizations involving other SFRs, characterized by very large surface areas in combination with relatively large through-pores. The invention also provides a method for producing the monoliths, a column containing the monoliths and an assay method using the column.

Abstract: A method of measuring a content of a compound such as gaseous sulfur dioxide in air comprising adsorbing the compound on a solid adsorbent, including a carrier consisting of a solid buffer of a partially regenerated ion exchanger.In addition the solid adsorbent may comprise a stabilizer which is either a stabilizer for the compound intended to be adsorbed on the adsorbent or a stabilizer for a reaction product thereof formed in the adsorption.