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| Number | Title | Issue Date |
| 8016916 | Apparatus and method for separating gas There is provided a gas separation apparatus for separating a specified gas from a gas to be treated containing a plurality of gases. The gas separation apparatus includes a plurality of serially-connected separation units that separate the specified gas from other ... | 09/13/2011 |
| 7964022 | Method and apparatus for selective capture of gas phase analytes using metal β-diketonate polymers A process and sensor device are disclosed that employ metal β-diketonate polymers to selectively capture gas-phase explosives and weaponized chemical agents in a sampling area or volume. The metal β-diketonate polymers can be applied to surfaces in various analyti... | 06/21/2011 |
| 7892322 | Apparatus and method for separating gas An apparatus and a method for separating a specified gas from a gas to be treated containing the specified gas comprising at least one ingredient, which comprises allowing the gas to be treated to flow through a column without the use of another gas for transferring... | 02/22/2011 |
| 7390349 | Polyhydrosiloxane compounds and articles and use thereof The present disclosure, in embodiments, provides a compound of the formula where R1, R2, R3, n, and m are as defined in the specification. The disclosure also provides an article including: ... | 06/24/2008 |
| 7329386 | Column packing material and method for producing the same The first subject of this invention is a column packing material comprising: a silica gel having a silanol group; a first chemical modification group which is bound to said silanol group; a silicon... | 02/12/2008 |
| 7314505 | Stationary phase deposition based on onium salts Onium salt chemistry can be used to deposit very uniform thickness stationary phases on the wall of a gas chromatography column. In particular, the stationary phase can be bonded to non-silicon based columns, especially microfabricated metal columns. Non-silicon mic... | 01/01/2008 |
| 7309377 | Method for separation of isotopes This invention relates to a method for separation of isotopes, that is, to obtain isotopically pure fractions by separating natural 1 isotope mixtures in elements, where hydrogen is employed as ligand on the elements that are to be isotopically separated, and where ... | 12/18/2007 |
| 7165444 | Concentrating column and sample processing device useful for elemental analysis of trace metals A concentrating column useful for elemental analysis of trace metals consists mainly of column body, filtration membranes 6 fixed at the fluid inlet end and the outlet end of the column body, and column packing 8 packed inside the column body, wherein ... | 01/23/2007 |
| 7157004 | Freeze drying for gas chromatography stationary phase deposition The present disclosure relates to methods for deposition of gas chromatography (GC) stationary phases into chromatography columns, for example gas chromatography columns. A chromatographic medium is dissolved or suspended in a solvent to form a composition. The comp... | 01/02/2007 |
| 7122496 | Para-xylene selective adsorbent compositions and methods Adsorbent compositions for vapor-phase adsorption processes, which are selective for para-xylene. Such compositions can be used in gas-phase adsorption processes for the separation of para-xylene or the separation of para-xylene and ethylbenzene from mixed xylenes o... | 10/17/2006 |
| 7022160 | Method of purifying gaseous nitrogen trifluoride The present invention relates to a method of purifying gaseous nitrogen trifluoride from CF4 as impurity. The method comprises selective adsorption of nitrogen trifluoride by dehydrated erionite at a temperature of from −30 to 30° C., displaceme... | 04/04/2006 |
| 6541273 | Multiple sorbent cartridges for solid phase extraction Methods and apparatus are disclosed which are useful for detecting the presence of various pesticides, including aryl pyrazoles such as fipronil. Pesticide residues are extracted from a variety of samples, including soil and/or water samples using techniq... | 04/01/2003 |
| 6368559 | Device for analyzing organic compounds particularly in aqueous and gaseous samples A device for analyzing organic compounds, particularly in aqueous and gaseous samples, constituted by a duct which is supplied in input by a gas whose pressure can be controlled by means of a regulator connected to a capillary column which is connected in... | 04/09/2002 |
| 6362245 | Porous co-polymer particles, process for preparing the same and use of the same A porous copolymer particle having a particle size of from 0.1 to 2,000 μm and a permanent pore size of from 2 to 800 nm comprising (i) a monomer containing from 5 to 60 wt % of a monomer (A) selected from N-vinylcarboxylic acid amides represented by for... | 03/26/2002 |
| 6326189 | Nucleic acid separating vessel, a method of manufacturing the nucleic acid separating vessel, and a method for separating the nucleic acid The sample vessel 1 comprises plurality of vessels 1a. The vessel 1a comprises an opening for sample inlet 3, a liquid sample outlet 4, and a silicon oxide composite particles structural body 2 is arranged at the bottom of the vessel 1a, i.e. the liquid s... | 12/04/2001 |
| 6270640 | Polymerized oligopeptide-surfactant chiral micelles Chiral separations can be enhanced through the use of polymerized dipeptide-surfactant or oligopeptide-surfactant chiral micelles. Because polymerized micelles eliminate much of the complex dynamic behavior associated with conventional micelles, polymeriz... | 08/07/2001 |
| 6190559 | Evaporative packing a capillary columns Method for loading a column with a packing material by inserting one end of a column to be packed into a slurry of a packing material in a volatile solvent, allowing said slurry to be drawn into said end of said column by capillary action, withdrawing sai... | 02/20/2001 |
| 5997746 | Evaporative packing of capillary columns Method for loading a column with a packing material by inserting one end of a column to be packed into a slurry of a packing material in a volatile solvent, allowing said slurry to be drawn into said end of said column by capillary action, withdrawing sai... | 12/07/1999 |
| 5900145 | Liquid crystal stationary phases for chromatography The present invention relates to liquid crystalline alkenes and liquid crystalline polysiloxanes prepared from these alkenes. More precisely, the present invention is related to the development of fused ring aromatic-containing side chain liquid crystal p... | 05/04/1999 |
| 5840953 | Purified tetraethoxysilane and method of purifying Tetraethoxysilane is purified by passing impure material through a gas chromatographic separating column at a temperature below the boiling point of the pure tetraethoxysilane. Separation of pure material from impurities occurs on the column, and the pure... | 11/24/1998 |
| 5770084 | Polymerized chiral micelles for chiral separations Chiral separations can be enhanced through the use of polymerized chiral micelles. Because polymerized micelles eliminate much of the complex dynamic behavior associated with conventional micelles, polymerized chiral micelles have stronger chiral recognit... | 06/23/1998 |
| 5716705 | Products having multiple-substituted polysiloxane monolayer A protective monolayer is formed on e.g. silica gel and glass surfaces comprising a monolayer of silicon and oxygen atoms which is substituted with first and second hydrocarbyl substituents.... | 02/10/1998 |
| 5679576 | Gas chromatographic analysis of fluoromethyl-1,1,1,3,3,3-hexafluoroisopropyl ether The present invention provides a method in which organic matter in the product accompanied with a non-reacted hydrogen fluoride can be handled without damaging the apparatus, using a cross-linked cyanopropylmethylphenylsilicone capillary column with which... | 10/21/1997 |
| 5653875 | Nucleophilic bodies bonded to siloxane and use thereof for separations from sample matrices A structure comprising bodies having a functional surface property bonded to a substrate via a siloxane polymer adhesive. The structure may comprise a novel composition comprising a siloxane polymer having carbon bodies bonded thereto by direct carbon to ... | 08/05/1997 |
| 5647979 | One-step preparation of separation media for reversed-phase chromatography A separation medium for reversed-phase chromatography is prepared by polymerizing an aqueous vinyl monomer mixture to which a hydrophobic alkyl methacrylate with 3 or more carbon atoms in the alkyl group and a detergent have been added. The further inclus... | 07/15/1997 |
| 5645717 | Hydrophobic polymers from water-soluble monomers and their use as chromatography media Macromolecular species in a liquid sample are chromatographically separated in a separation medium formed by polymerization of monomers in an aqueous solution with a sufficient amount of crosslinking agent to cause aggregation and precipitation of the pol... | 07/08/1997 |
| 5630937 | Nucleophilic bodies bonded to siloxane and use thereof for separations from sample matrices A structure comprising bodies having a functional surface property bonded to a substrate via a siloxane polymer adhesive. The structure may comprise a novel composition comprising a siloxane polymer having carbon bodies bonded thereto by direct carbon to ... | 05/20/1997 |
| 5620603 | Nucleophilic bodies bonded to siloxane and use thereof for separations from sample matrices A structure comprising bodies having a functional surface property bonded to a substrate via a siloxane polymer adhesive. The structure may comprise a novel composition comprising a siloxane polymer having carbon bodies bonded thereto by direct carbon to ... | 04/15/1997 |
| 5609756 | Nucleophilic bodies bonded to siloxane and use thereof for separations from sample matrices A structure comprising bodies having a functional surface property bonded to a substrate via a siloxane polymer adhesive. The structure may comprise a novel composition comprising a siloxane polymer having carbon bodies bonded thereto by direct carbon to ... | 03/11/1997 |
| 5607580 | Nucleophilic bodies bonded to siloxane and use thereof for separations from sample matrices A structure comprising bodies having a functional surface property bonded to a substrate via a siloxane polymer adhesive. The structure may comprise a novel composition comprising a siloxane polymer having carbon bodies bonded thereto by direct carbon to ... | 03/04/1997 |
| 5599625 | Products having multiple-substituted polysiloxane monolayer A protective monolayer is formed on e.g. silica gel and glass surfaces comprising a monolayer of silicon and oxygen atoms which is substituted with first and second hydrocarbyl substituents.... | 02/04/1997 |
| 5599445 | Nucleophilic bodies bonded to siloxane and use thereof for separations from sample matrices A structure comprising bodies having a functional surface property bonded to a substrate via a siloxane polymer adhesive. The structure may comprise a novel composition comprising a siloxane polymer having carbon bodies bonded thereto by direct carbon to ... | 02/04/1997 |
| 5492627 | Method for separating mercury from fluids using composite articles Composite articles are useful for separating mercury from fluids. The composite articles can be porous supports comprising an inert substrate having immobilized thereon finely divided gold optionally in combination with a tin salt coating. The porous supp... | 02/20/1996 |
| 5431821 | Glassy carbon in separation processes A separation process includes producing low temperature glassy carbon from an aromatic oligomeric precursor with acetylene groups and using the resultant glassy carbon as the stationary phase in a separation process. Glassy carbon with preselected selecti... | 07/11/1995 |
| 5378440 | Method for separation of substances Methods for separation of substances are provided. The methods include contacting a mixture of at least two components in flowable conditions with mesoporous, crystalline materials termed M41S which also include MCM-41 materials. The mesoporous crystallin... | 01/03/1995 |
| 5338454 | Chiral mobile phase additives for improved liquid-chromatography separations Chromatographic separations and resolutions of racemic mixtures and diastereoisomers are enhanced by simultaneously employing an enantiomeric, chiral stationary phase (CSP) and an enantiomeric, chiral mobile phase additive (CMPA) bearing a stereoisomeric ... | 08/16/1994 |
| 5334310 | Column with macroporous polymer media A continuous liquid chromatographic column containing a separation medium in the form of a macroporous polymer plug is disclosed. The column possesses numerous advantages over conventional columns which are packed with beads or particles. The plug contain... | 08/02/1994 |
| 5308495 | Chromatography processes using doped sol gel glasses as chromatographic media Chromatography processes employ doped sol gel glasses as chromatographic media. In one embodiment, a process for qualitative or quantitative determination of a reactive chemical contained in a sample comprises passing the sample through a column or planar... | 05/03/1994 |
| 5272126 | Adsorption type packing for gas chromatography and process for producing the same An adsorption type packing for gas chromatography composed of finely divided carbon particles in whole, and having a ratio of nitrogen gas adsorption at a relative pressure of 0.3 (V0.3) to nitrogen gas adsorption at a relative pressure of abou... | 12/21/1993 |
| 5271833 | Polymer-coated carbon-clad inorganic oxide particles Polymer-coated carbon-clad inorganic oxide particles are disclosed which are useful in sorbent applications, particularly as packing materials for High Performance Liquid Chromatography (HPLC). A method for the preparation of a chromatographic support mat... | 12/21/1993 |
