| Patents for G01N 31 - Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroups; Apparatus specially adapted for such methods (18,554) |
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| 06/14/1990 | WO1990006508A1 Process and apparatus for the detection of sulfur |
| 06/13/1990 | EP0372802A2 Optical waveguide sensor |
| 06/13/1990 | EP0371992A1 Ionophores as reagents for detecting ions. |
| 06/13/1990 | CN1008402B Automatical potentiometric titrimeter |
| 06/12/1990 | US4933525 Microwaveable container having temperature indicating means |
| 06/12/1990 | US4933144 Colorimetric gas measuring device for fluorine |
| 06/06/1990 | EP0371513A2 Device and method for assay of liquid sample |
| 06/05/1990 | US4931579 Indicators for the detection of thiol groups |
| 06/05/1990 | US4931387 Analysis implement having an oxygen supplying layer |
| 06/05/1990 | US4931223 Mixture releasing light of different wavelengths by enzyme decomposition |
| 05/31/1990 | WO1990005914A1 Biological diagnostic assay system |
| 05/30/1990 | EP0371003A2 Device for the analytical determination of components in a body fluid |
| 05/30/1990 | EP0370417A1 Biological diagnostic assay system |
| 05/30/1990 | CN2057758U Arsenic-determining instrument by china pharmacopoeia standard |
| 05/29/1990 | US4929562 Method and apparatus for detecting gem-polyhalogenated hydrocarbons |
| 05/23/1990 | EP0369733A2 Fluorescent indicator dyes for alkali metal cations, their preparation and use |
| 05/23/1990 | EP0369013A1 Testing piece and testing device for measuring chloride |
| 05/22/1990 | US4927566 Dissolving, abosrption, extraction |
| 05/17/1990 | WO1990005302A1 Enhanced electrochemiluminescence |
| 05/16/1990 | EP0368562A2 Determination of the functionalization of a solid support |
| 05/16/1990 | EP0368358A2 Method and apparatus for the continuous measuring of mercury and other heavy metals in waste gases |
| 05/16/1990 | CN1042238A Quick determination for water hardness of low pressure boiler |
| 05/15/1990 | US4924716 Dissolution testing apparatus |
| 05/09/1990 | EP0367581A1 Fragrance releasing pull-out sampler |
| 05/08/1990 | US4923806 Method and apparatus for refrigerant testing in a closed system |
| 05/03/1990 | WO1990004783A1 Quick color test to detect lead release form glazed ceramic and enameled metal ware |
| 05/03/1990 | WO1990004781A1 Assay for qualitative and quantitative detection of organic and inorganic analytes of diverse chemical classes via the selective formation and growth of light scattering crystals |
| 05/01/1990 | CA1268406A1 Test strip with adjustable sample absorption capacity |
| 04/28/1990 | CA2001477A1 Quick color test to detect lead release from glazed ceramic and enameled metal ware |
| 04/25/1990 | EP0364705A2 Air transportation device for a gas-sampling tube |
| 04/24/1990 | US4920057 Solvent extraction of dithizone complex with metal cations; drinking water analysis |
| 04/24/1990 | US4919893 Adjusting temperature control; furnace and cooling means |
| 04/24/1990 | US4919891 Sensor with overcoating and process for making same |
| 04/18/1990 | EP0363993A2 Chimically sensitive, dimensionally-stable organosilicon material composition and techniques |
| 04/18/1990 | EP0363472A1 Quantitative carbon dioxide detector |
| 04/17/1990 | US4918022 Analysis of bulk asbestos samples |
| 04/17/1990 | US4917863 Colorimetric gas measuring device for chlorosilanes |
| 04/17/1990 | US4917503 Monitoring freshness of perishable products |
| 04/17/1990 | CA1267816A1 Process for the production of test strips by casting method |
| 04/17/1990 | CA1267812A1 Adjustable test pack |
| 04/10/1990 | US4916077 Method and apparatus for oxidative decomposition and analysis of a sample |
| 04/10/1990 | US4916058 Chromogens |
| 04/10/1990 | EP0265513A4 Method and apparatus for measuring cyanide. |
| 04/10/1990 | CA1267597A1 Reagent test device containing hydrophobic barriers |
| 04/10/1990 | CA1267596A1 Multilayer analytical element and method of making, using ultrasonic or laser energy |
| 04/10/1990 | CA1267595A1 Test strips and process for the production of test strips |
| 04/05/1990 | DE3900848A1 Method and apparatus for the qualitative determination of tar-containing constituents in lining asphalts |
| 04/04/1990 | EP0360847A1 Curcumin in the detection and warning of cyanide adulterated food products |
| 04/03/1990 | US4914037 Method and apparatus for analysis of a sample for nitrogen |
| 04/03/1990 | US4914020 Multi-layer analytical element with preserved enzyme containing spreading layer |
| 04/03/1990 | US4913882 Diffusion sampler having a conversion zone |
| 04/03/1990 | US4913881 Dosimeter |
| 03/27/1990 | CA1267081A1 Multizone analytical element having labeled reagent concentration zone |
| 03/22/1990 | WO1990002511A1 Method and apparatus for chemical species determination |
| 03/21/1990 | EP0358991A1 Test device for an optical determination of cations, anions or electrically neutral ionogenic species, and test method using said device |
| 03/21/1990 | CN2054906U Enzyme washer |
| 03/15/1990 | DE3930654A1 Multidimensionale chromatographische anordnung Multidimensional chromatographic arrangement |
| 03/14/1990 | EP0358206A2 Method and device for the analysis of mercury |
| 03/13/1990 | US4908323 Method for the determination of organic peroxides in organic solutions |
| 03/13/1990 | US4908321 Contacting sample with keto group containing organic acid, determining liberated carbon dioxide |
| 03/08/1990 | WO1990002329A1 Smog monitor |
| 03/08/1990 | WO1990002000A1 Microtiter plate washer |
| 03/07/1990 | EP0357586A2 Process for the quantitative determination of at least one parameter of a liquid or gaseous sample |
| 03/07/1990 | EP0356698A2 Method and apparatus for cleaning atmosphere gas used in making high-purity fine particles of reactive metals |
| 03/06/1990 | CA1266386A1 Apparatus and process for pyrolysis and analysis of samples containing organic matter |
| 03/01/1990 | DE3928568A1 Ion assay device contg. ionophore with several crown ether residues - which forms ion complex which reacts with colour forming indicator, esp. for clinical measurement of alkali metal |
| 02/28/1990 | EP0356116A2 A steam sensitive composition and a sterilization indicator composition containing the same |
| 02/28/1990 | EP0355688A2 Method for measuring the alcohol content of a damping liquid in an alcohol damping device of an offset printing machine |
| 02/28/1990 | EP0355637A2 System and process for spotting reagents on porous supports |
| 02/27/1990 | US4904606 Method and apparatus for reductive decomposition and analysis of a sample |
| 02/27/1990 | US4904449 Colorimetric gas measuring device |
| 02/22/1990 | WO1990001696A1 Process and device for determining oxidable substances contained in the water of an aqueous sample liquid |
| 02/22/1990 | WO1990001695A1 Carbon dioxide indicator |
| 02/20/1990 | US4902478 Indicator sheet for an autoclave test pack |
| 02/20/1990 | US4902477 Non-diffusive substituted aryldiazonium salt reagent |
| 02/15/1990 | DE3827578A1 Verfahren und vorrichtung zur bestimmung oxidierbarer wasserinhaltsstoffe einer waessrigen probenfluessigkeit Method and device for determination of oxidizable substances water content of an aqueous probenfluessigkeit |
| 02/14/1990 | EP0354726A1 Test for catalyst activity |
| 02/14/1990 | CN1039656A Process and reagent for determination of ionic strength or specific weight of aqueous liquids |
| 02/13/1990 | US4900936 Dosimeter construction |
| 02/13/1990 | US4900682 Method and reagent for the determination of peracids |
| 02/13/1990 | US4900665 Separation of substrate and layer containing acid acceptor and buffer; storage stability |
| 02/13/1990 | US4900663 Colorimetric test filter has substrate to which antibodies bind |
| 02/08/1990 | DE3826090A1 Indicator device for traces of sulphur compounds |
| 02/07/1990 | EP0354204A2 Optical sensor and process for its production |
| 02/06/1990 | US4898813 Catalytic test composition intended to produce a range of colors |
| 01/31/1990 | EP0353189A1 Copper and nickel dihalogenide complexes, process for their preparation and their use |
| 01/31/1990 | EP0352319A1 Assaying aluminium in drinking water |
| 01/30/1990 | US4897548 Apparatus for the multiple analysis of gases |
| 01/30/1990 | US4897347 Multilayer analysis film for analyzing transaminase |
| 01/30/1990 | US4897128 Process of determining the zinc content of phosphating baths |
| 01/25/1990 | WO1990000737A1 A method and device for measuring formaldehyde emission from surfaces |
| 01/25/1990 | WO1990000618A1 Preparation and use of fluorescent benzothiazole derivatives |
| 01/25/1990 | WO1990000572A1 Hydrogel dye film sensing elements and their preparation |
| 01/25/1990 | DE3825053A1 Method and titration apparatus for the biamperometric determination of water by the Karl Fischer method |
| 01/24/1990 | EP0351605A1 Quantitative determination of phosphorus |
| 01/23/1990 | US4895704 Sensitivity, strength |
| 01/23/1990 | US4895567 Ethylene-vinyl acetate or ethylene-acrylic acid copolymer; diapers |
| 01/23/1990 | CA1264543A1 Method of hair damage assessment |
| 01/18/1990 | DE3823996A1 Method (metal indicator detection) for the complexometric determination of oxyanions/polyanions at picomole sensitivity, use for the continuous post-column detection in liquid chromatographic separation and for detection after separation on thin layer supports |
| 01/16/1990 | US4894346 Scale or corrosion inhibitors |