| Patents for G01N 30 - Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography (41,194) |
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| 03/20/1991 | EP0382752A4 Improved differential pressure capillary viscometer |
| 03/19/1991 | US5001071 Vented retention gap capillary gas chromatography method |
| 03/13/1991 | EP0416748A1 Quaternised pei silica solid supports for chromatography |
| 03/13/1991 | EP0416416A1 Method for purifying low molecular weight compounds of peptide or pseudo-peptide structure |
| 03/13/1991 | EP0416326A2 Apparatus for automated isolate extraction using solid phase sorbent |
| 03/13/1991 | CN1049910A Manufacture of self-sustainings film filament type sensor and application of same |
| 03/12/1991 | US4999493 Electrospray ionization interface and method for mass spectrometry |
| 03/12/1991 | US4999285 Paper strip in a housing, immunoassay |
| 03/12/1991 | US4999162 High temperature flame jet for gas chromatography |
| 03/12/1991 | US4999112 Removal of thiamine monophosphate from a solution of thiamine |
| 03/12/1991 | US4999105 Apparatus for membrane assisted liquid chromatography |
| 03/12/1991 | US4999102 Liquid transfer manifold system for maintaining plug flow |
| 03/12/1991 | US4999098 Ion chromatography, screening, regeneration, ion exchanging |
| 03/12/1991 | US4998433 Method and means for condensing trace air contaminates from gases |
| 03/12/1991 | CA1281208C Method and apparatus for reagent addition to a flowing liquid carrier stream |
| 03/08/1991 | CA2005917A1 Method for activating polymeric carriers and compositions prepared therefrom for use in affinity chromatography |
| 03/07/1991 | WO1991002816A1 Isolating cells by elution from cationically derivatized cellulosic material |
| 03/07/1991 | DE4017805A1 Preparing thin film of analyte for examination - by laser desorption from surface e.g. of electrophoretic gel plate, chromatography plate or bio:sensor |
| 03/06/1991 | EP0415822A1 Continuous process and apparatus of chromatographic separation of a mixture of at least three components into three purified effluents by means of one solvent at two different temperatures and/or pressures |
| 03/06/1991 | EP0415821A1 Continuous process and apparatus of chromatographic separation of a mixture of at least three components into three purified effluents by means of two solvents |
| 03/06/1991 | EP0415148A2 Chromatographic instrument with command sequencing |
| 03/05/1991 | USH896 Separating column for gas chromatography |
| 03/05/1991 | US4997966 Chromatography, chemical condensation |
| 03/05/1991 | US4997965 Enantiomeric silanes, modified packing material, and use thereof |
| 03/05/1991 | US4997536 Control of electrokinetic potential by treatment with redox agents |
| 03/05/1991 | CA2024250A1 Method for purifying low molecular weight compounds of peptide of pseudo-peptide structure |
| 03/01/1991 | WO1991003722A1 Osmotic method for determining the molecular weight of solutes in solution with a solvent |
| 03/01/1991 | CA2065322A1 Osmotic method for determining the molecular weight of solutes in solution with a solvent |
| 02/28/1991 | DE3927863A1 High pressure liq., chromatography analyser - with holder for pre-column for opt. needle connection instead of main column |
| 02/27/1991 | EP0414324A1 Method of manufacturing a separation column and a separation column |
| 02/26/1991 | US4995163 Method of assembling a chromatography column |
| 02/19/1991 | US4994180 Solvent handling system |
| 02/19/1991 | US4994096 Gas chromatograph having integrated pressure programmer |
| 02/19/1991 | CA1280399C Spherical sio2 particles |
| 02/13/1991 | EP0412301A1 Boron nitride membrane in wafer structure |
| 02/13/1991 | CN2071341U Double sleeve five piece circular sprayer |
| 02/12/1991 | WO1991002242A1 Self-supporting thin-film filament detector, process for its manufacture and its applications to gas detection and gas chromatography |
| 02/12/1991 | WO1991001721A1 Cyclodextrin polymer beads |
| 02/12/1991 | US4992168 Controlling temperature; calibration |
| 02/12/1991 | US4992083 Apparatus for intermediate enrichment of trace substances from a gas stream in a cold trap, and chromatography arrangement provided therewith |
| 02/12/1991 | US4991883 Conduit |
| 02/12/1991 | US4991428 Ion chromatography method for low concentrations |
| 02/12/1991 | US4991423 Method of gas-chromatographic analysis of mixtures and device therefor |
| 02/12/1991 | CA2060183A1 Self-supporting thin-film filament detector, process for its manufacture and its applications to gas detection and gas chromatography |
| 02/07/1991 | WO1991001489A1 Optical devices |
| 02/05/1991 | US4990458 Derivatization of organic compounds during their analysis or determination |
| 02/05/1991 | US4990456 Analysis of asphalt |
| 02/05/1991 | US4990259 Chromatographic separator sorbent bed preparation |
| 02/05/1991 | US4990250 Reference flow liquid chromatography system with stable baseline |
| 02/05/1991 | US4989974 Chromatographic, spectrographic scintillation measurements |
| 02/05/1991 | CA1279864C Method for determining the amount of oil in a sponge core |
| 01/31/1991 | DE3839035A1 Verfahren zur chromatographischen bestimmung von kationen Chromatographic method for the determination of cations |
| 01/30/1991 | EP0410665A2 Discharge ionization detector |
| 01/30/1991 | EP0410341A2 Method and apparatus for interfacing chromatographic equipment with a mass spectrometer |
| 01/30/1991 | EP0410340A2 Method and apparatus for interfacing a chromatographic equipment with a mass spectrometer |
| 01/30/1991 | EP0409972A1 Apparatus and method for delivering supercritical fluid. |
| 01/30/1991 | EP0175721B1 Method and apparatus for the separation of components of a mixture by thin layer chromatography |
| 01/30/1991 | CN2070447U High-pressure liquid phase chromatograph electrochemical tester |
| 01/29/1991 | US4988870 Open-split interface for mass spectrometers |
| 01/29/1991 | US4988447 Pumping a solvent for chromatography, dividing into streams, injection, detection, signals |
| 01/29/1991 | US4988446 Quantitative analysis by chromatography of hydrocarbon oils, uv radiation |
| 01/29/1991 | US4987767 Exposive detection screening system |
| 01/29/1991 | CA1279592C Nortriptyline conjugates to antigenic proteins and enzymes |
| 01/24/1991 | WO1991001000A1 Device and installation of thin film chromatography, with improved development |
| 01/24/1991 | WO1991000999A1 Gas chromatograph/autosampler coupling assembly |
| 01/24/1991 | WO1991000762A1 Perfusive chromatography |
| 01/23/1991 | EP0409814A1 Variant proteins and polypeptides possessing enhanced affinity for immobilized-metal affinity matrices |
| 01/23/1991 | EP0409522A2 Valve device |
| 01/23/1991 | EP0409176A2 Method and materials for detecting pathology from alterations in estrogen metabolism |
| 01/23/1991 | EP0408585A1 Immobilized artificial membranes |
| 01/23/1991 | EP0389571A4 Differential refractometer |
| 01/23/1991 | EP0387276A4 Method to produce immunodiagnostic reagents |
| 01/22/1991 | USRE33524 Cyclic variation of acoustic energy propagation |
| 01/22/1991 | US4986919 Chromatographic pumping method |
| 01/22/1991 | US4986909 Efficient, uniform distribution of fluid flow |
| 01/22/1991 | US4986908 High performance liquid chromatography |
| 01/22/1991 | US4986110 Method and apparatus for taking samples of and for analyzing hydrocarbons |
| 01/17/1991 | DE3921845A1 Quantitative determn. of thin layer chromatography fractions - by processing various materials pyrolysed by microwave or laser |
| 01/16/1991 | EP0408177A1 Check valve cartridges with controlled pressure sealing |
| 01/16/1991 | EP0408146A2 Method for the purification of therapeutically active recombinant acidic fibroblast growth factor |
| 01/16/1991 | EP0407560A1 Chromatography on a continuous polymer. |
| 01/16/1991 | EP0407512A1 Compact separation system with snap-in columns. |
| 01/16/1991 | EP0407469A1 Process and device for non-intrusively, continuously and automatically taking, storing and supplying analysis samples and data for future evaluation. |
| 01/16/1991 | EP0407412A1 Substituted cyclodextrins and process for chromatographic separation of chiral organic compounds. |
| 01/15/1991 | US4985625 Transfer line for mass spectrometer apparatus |
| 01/15/1991 | US4985144 Purification of protein antigens |
| 01/15/1991 | US4985143 Method for packing chromatographic beds |
| 01/15/1991 | US4984602 Pressure control apparatus and apparatus for effecting extraction chromatographic separation, and fractionation by employing the same |
| 01/14/1991 | CA2020720A1 Method for the purification of therapeutically active recombinant acidic fibroblast growth factor |
| 01/10/1991 | WO1991000145A1 Anion exchanger |
| 01/10/1991 | WO1991000131A1 Direct resistive heating and temperature measurement of metal-clad capillary columns in gas chromatography and related separation techniques |
| 01/09/1991 | EP0406757A2 Method for chromatographic separation |
| 01/08/1991 | US4983528 Measurement of unsaturation level in butyl and EPDM rubbers |
| 01/08/1991 | US4983044 Quantitative analysis of biological materials and photogrtaphic film and apparatus therefor |
| 01/08/1991 | US4982616 Sampling device for inspection vehicles |
| 01/08/1991 | US4982597 Restrictor heating in supercritical fluid chromatography |
| 01/03/1991 | DE3921231A1 Flow monitor, e.g. for buffer soln. in high pressure - LC has chamber with inlet, outlet and contact electrode arrangement |
| 01/02/1991 | EP0404934A1 A method of preparing samples for mass analysis by desorption from a frozen solution. |
| 01/02/1991 | CA1278561C Lipoprotein adsorbent and apparatus for removing lipoproteins using the same |
| 01/01/1991 | US4982097 Vaporization device for continuous introduction of liquids into a mass spectrometer |