| 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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| 04/04/1991 | WO1991004488A1 Method and means for detecting polyhydroxyl compounds |
| 04/04/1991 | WO1991004481A1 Process for determining very small quantities of herbicides based on triazine compounds |
| 04/03/1991 | EP0346384A4 Method and system for determining organic matter in an aqueous solution |
| 04/02/1991 | US5004696 Automatic total reducers monitoring and adjustment system |
| 04/02/1991 | US5004685 Dry-type multilayer analytical element |
| 04/02/1991 | US5004585 Having particulate substrate impregnated with both indicator and pretreatment material; for hydrogen detection and measurement |
| 04/02/1991 | US5004584 Device for testing fluids |
| 04/02/1991 | CA1282305C Colorimetric gas dosimeter |
| 03/27/1991 | EP0419167A1 Isotopic composition analyzer |
| 03/27/1991 | EP0418798A2 Method and apparatus for the determination of watersoluble oxidants in air |
| 03/27/1991 | EP0418385A1 Benzotriazole derivatives and reagents containing same for analyzing carboxylic acids |
| 03/26/1991 | US5002894 Method for the determination of lignin content of a sample by flash pyrolysis in an atmosphere of hydrogen or helium and method therefor |
| 03/26/1991 | US5002892 Titration; Standardizing Product Uniformity |
| 03/21/1991 | WO1991003731A1 Method of and device for measuring extremely small quantity of oxygen in gas |
| 03/21/1991 | DE3929751A1 Test strip foil photometric analysis - replaces separate filter by correspondingly coloured carrier medium |
| 03/20/1991 | EP0418169A2 Method for determination of ion concentration, specific gravity, or osmotic pressure of a solution and apparatus therefor |
| 03/20/1991 | EP0417535A2 Optical oxygen sensor |
| 03/20/1991 | CA2025650A1 Method and apparatus for measuring the air content of water-soluble oxidizers |
| 03/19/1991 | US5000920 Device for the heat treatment of gaseous test samples |
| 03/19/1991 | US5000919 For colorimetric analysis; protecive coating by immersion in hot saturated salt solution |
| 03/19/1991 | CA1281715C Water-compatible reducible compounds and their use in analytical compositions and methods |
| 03/19/1991 | CA1281642C Solid-phase analytical device and method for using same |
| 03/13/1991 | EP0416504A1 The Bowie-Dick test device |
| 03/13/1991 | EP0416160A1 Apparatus for measuring the partial pressure of gases or vapours |
| 03/13/1991 | CN1049909A Gravimetric determination of ioding number of carbon black |
| 03/13/1991 | CN1012018B Scale plate of apparatus for measuring ionic concentration and like and scale method thereof |
| 03/13/1991 | CN1012013B Process for characterizing catalyst by determining activity of conversion and coking |
| 03/12/1991 | US4999305 Apparatus for titration flow injection analysis |
| 03/12/1991 | US4999285 Paper strip in a housing, immunoassay |
| 03/12/1991 | CA2022558A1 Optical oxygen sensor |
| 03/12/1991 | CA1281267C Colorimetric detection device |
| 03/07/1991 | WO1991002973A1 Porous polymer film calcium ion chemical sensor and method of using the same |
| 03/06/1991 | EP0415679A2 Blood separation and analyte detection techniques |
| 03/06/1991 | EP0414935A1 Method and composition for the assay of albumin |
| 03/01/1991 | CA2024064A1 Blood separation and analyte detection techniques |
| 03/01/1991 | CA2022937A1 Gravimetric determination of the iodine number of carbon black |
| 02/24/1991 | CA2018780A1 Autosampler for stable isotope analysis |
| 02/22/1991 | CA2023717A1 Porous polymer film calcium ion chemical sensor and method of using same |
| 02/21/1991 | WO1991002249A1 Water-disintegrable material and testing member for bodily fluid prepared therefrom |
| 02/20/1991 | EP0413678A2 Method for the detection and determination of human serum albumin in biological fluids using fluorogenic cyanine dyes |
| 02/20/1991 | EP0413114A2 Method for bonding an analyte-sensitive dye compound to an addition-cure silicone |
| 02/20/1991 | CN2071788U High-pressure sample dissolving tank |
| 02/19/1991 | US4994570 Indicators for the detection of thiol groups |
| 02/19/1991 | US4994398 Uniform mixture of tungsten and tin powders; for molded shapes used in quantitative analysis of carbon or sulfur in alloys |
| 02/19/1991 | US4994395 Determination of potassium cations |
| 02/19/1991 | US4994117 Quantitative carbon dioxide detector |
| 02/16/1991 | CA2019726A1 Method for bonding an analyte-sensitive dye compound to an addition-cure silicone |
| 02/12/1991 | US4992382 Porous polymer film calcium ion chemical sensor and method of using the same |
| 02/12/1991 | US4992381 Method of detecting electrolytes in an aqueous test sample using chromogenic hemispherands and test device therefor |
| 02/12/1991 | US4992379 Field test for aromatics in groundwater |
| 02/12/1991 | US4992296 Abuse-type drug test papers and methods of making and using same |
| 02/07/1991 | WO1991001490A1 Analytical assay method |
| 02/06/1991 | EP0411848A2 An on-line moisture control method for powdered or granular materials and a system to execute the method |
| 02/06/1991 | EP0411732A1 Surgical glove |
| 02/06/1991 | EP0411416A1 Selectivity improvement for lithium ion tests |
| 02/06/1991 | CN1011551B Additive for measuring carbon and sulphur contents in iron and steel |
| 02/05/1991 | US4990459 Moving a solution drop on a hydrophobic surface containing absorbed impurities and analyzing |
| 02/05/1991 | US4990457 Porous spreading layer containing cholic acid, deoxycholic acid or salts; accuracy |
| 02/05/1991 | US4990284 Solvent dyes consist of cobaltous chloride, resins as a binder and solvent carrier; high speed |
| 02/05/1991 | US4990075 Reaction vessel for performing sequential analytical assays |
| 02/04/1991 | CA2021407A1 Selectivity improvements for lithium ion tests |
| 02/02/1991 | CA2022386A1 On-line moisture control method for powdered or granular materials and a system to execute the method |
| 01/29/1991 | US4988626 On-line test and analysis process to establish a material balance of a chemical reaction |
| 01/29/1991 | US4988625 Carbonyldiimidazole treatment of the support crosslinking to form a carbamate with polysaccharides |
| 01/24/1991 | WO1991001001A1 A detector for monitoring low molecular weight compounds |
| 01/23/1991 | EP0408748A1 Light emitting probe complex for measuring ph and method of ph measurement |
| 01/23/1991 | EP0321487B1 Enhanced luminescent assay |
| 01/22/1991 | US4987195 Polyacrylamide gels and method for the preparation of polyacrylamide gels |
| 01/16/1991 | EP0407818A1 Hydrogen Gas Analyzer |
| 01/16/1991 | EP0407800A2 Analysis method for determining substances from biological fluids |
| 01/15/1991 | US4985205 Test carrier analysis system |
| 01/15/1991 | US4984476 Air conveyor for gas-sampling tubes |
| 01/15/1991 | CA1279099C Method for remotely detecting an electric field |
| 01/09/1991 | EP0406334A1 Hydrogel dye film sensing elements and their preparation |
| 01/08/1991 | CA2019424A1 Analysis method for determining substances from biological fluids |
| 01/02/1991 | EP0405693A1 Method and device for determination of the wobbe index |
| 01/02/1991 | CN1048266A Light or heavy volatile oil determination instrument |
| 01/01/1991 | US4981361 Color comparison device having a color sample-bonding wheel which permits easy removal of a color sample sticker |
| 12/27/1990 | EP0403876A2 Method and device for determining the use intensity of textile pieces |
| 12/26/1990 | CN1010984B Method and apparatus for saccharide analysis |
| 12/25/1990 | US4980131 Analysis |
| 12/19/1990 | EP0402667A1 Diarylimidazoles |
| 12/18/1990 | US4978612 Coupling of nitrogen heterocyclic compound and aromatic amine; dye forming |
| 12/18/1990 | US4978504 Medical swab with preimpregnated reagant |
| 12/18/1990 | US4978364 Aqueous solution containing iodine; mixed prior to application |
| 12/12/1990 | EP0401648A1 Process and equipment for the determination of organic carbon content in complex matrixes |
| 12/12/1990 | EP0377729A4 Improved methods of using chemiluminescent 1,2-dioxetanes |
| 12/11/1990 | US4977094 Comparing electrical impedance of samples vaporized at different temperatures and condensed |
| 12/11/1990 | US4977093 Removal of hydrogen sulfide impurities, then conversion of carbonyl sulfide to hydrogen sulfide, measurement, calibration |
| 12/05/1990 | EP0401001A2 Chemiluminescent doubletriggered 1,2-dioxetanes |
| 12/05/1990 | EP0400512A2 Device for testing samples for mercury and/or hydride-generators |
| 12/05/1990 | EP0341249A4 Developing system and a method of using the developing system for detection of carboxylic acids |
| 12/04/1990 | US4975366 Immobilization of both antibody and substrate for the enzyme labeled antigen; high-speed automatic equipment |
| 12/01/1990 | WO1990015040A1 Chemiluminescent double-triggered 1,2-dioxetanes |
| 11/30/1990 | CA2017146A1 Diarylimidazoles |
| 11/28/1990 | EP0225474B1 Test strip identification |
| 11/27/1990 | US4972935 Apparatus for fixing the position of test zones of a test strip and for reversing the latter |
| 11/27/1990 | CA1276877C Multizone analytical element having detectable signal concentration zone |
| 11/27/1990 | CA1276863C Compositions useful for detecting the presence of oxygen, process forthe preparation of these compositions and oxygen detectors comprising them |
| 11/22/1990 | EP0398739A2 Filter applicator |