| 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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| 07/07/1981 | US4277248 Methods for the detection of low level concentrations of sulfonamides |
| 07/07/1981 | CA1104489A1 In situ oil shale retorting |
| 07/01/1981 | EP0031149A1 Method of calibrating a measuring arrangement for the determination of the partial pressure of oxygen in blood |
| 06/30/1981 | US4276190 Process for monitoring time-temperature histories of perishables utilizing inactive form of diacetylene |
| 06/30/1981 | US4276049 Method for the determination of an amino or aminosulphonic acid |
| 06/25/1981 | WO1981001746A1 Chromatographic sheet of layer for pressurized layer chromatographic apparatus |
| 06/16/1981 | CA1103137A1 Method of monitoring surface charge of suspended materials colloidal system |
| 06/10/1981 | EP0030161A2 Method for determining chemical species |
| 06/10/1981 | EP0029917A1 Indicator composition and test device containing amine oxide |
| 06/09/1981 | US4272485 Indicators, vessels |
| 06/09/1981 | US4272484 Filling for optodes |
| 06/09/1981 | US4272480 Device for reducing the sensitivity of an ethylene oxide leak detector |
| 06/09/1981 | US4272479 Sulfuric acid, silica gel, quartz |
| 06/02/1981 | US4271125 Substrate impregnated with acid, methyl red and mercuric chloride |
| 06/02/1981 | US4271121 Plaque for measuring the dose of reactive gases |
| 06/02/1981 | US4270920 Integrated material for chemical analysis and a method of using the same |
| 06/02/1981 | US4270919 Process for assessing the presence of oxidizing agents on of keratin fibers |
| 06/02/1981 | CA1102226A1 Urea assay and reagents therefor |
| 05/27/1981 | EP0029089A1 Method of diagnosing metabolism disorders by quantitatively determining the surface charge of serum-lipoproteins |
| 05/26/1981 | US4269804 Colorimetric quantitative analysis; portable; air pollution |
| 05/26/1981 | US4269604 Dissolving an oil sample in a solvent and titrating with a base; repeat using an acid; measuring the volumes of titrants; quantitative analysis |
| 05/26/1981 | CA1101772A1 Reusable radiation monitor |
| 05/26/1981 | CA1101771A1 Method of making reagent test device and reagent test device made according to this method |
| 05/26/1981 | CA1101767A1 Reagent composition adapted to the determination of peroxides and method for analytically employing such composition |
| 05/19/1981 | CA1101320A1 No translation available |
| 05/19/1981 | CA1101319A1 Printed reagent test devices and method of making same |
| 05/13/1981 | EP0028319A1 Method and apparatus for effecting a repeated chemical analysis of a process stream |
| 05/12/1981 | US4266942 Method for the automatic electro-chemical determination of the end point of a titration |
| 05/06/1981 | EP0027917A1 Reagent and process for the determination of hydrazine |
| 05/05/1981 | US4265856 Analysis reactor and its use for volumetric analysis of a sample of a substance in powder form |
| 05/05/1981 | US4265635 Hollow fibers, colorimetric analysis |
| 04/28/1981 | CA1100021A1 Test means and method for interference resistant determination of oxidizing substances |
| 04/21/1981 | US4263406 Apparatus for continuously referenced analysis of reactive components in solution |
| 04/21/1981 | US4262713 Process for charging and mixing standard gas mixture |
| 04/21/1981 | CA1099710A1 Antitumor agents |
| 04/07/1981 | US4260777 Diagnostic agent for the detection of protein in body fluids |
| 04/07/1981 | US4260679 Method and reagent for the quantitative determination of hydrogen peroxide and precursors thereof |
| 04/01/1981 | EP0025782A1 Device for measuring a certain amount of liquid |
| 03/31/1981 | US4259431 Method for making stationary heat transfer coefficient fields visible by photochemical means |
| 03/31/1981 | US4259287 Testing tube construction for measuring sodium hydroxide and/or calcium oxide |
| 03/24/1981 | US4258001 Including biological fluids |
| 03/24/1981 | US4258000 Poromeric matrix containing dissolved indicator |
| 03/24/1981 | US4257776 By chromatographic separation using a polyamide coated plate over which linoleic acid is deposited and heated to produce a color change |
| 03/24/1981 | US4257772 Method and apparatus for chemical analysis of specimens |
| 03/18/1981 | EP0025227A2 Precursor indicator compositions |
| 03/17/1981 | US4256694 Carbon monoxide monitoring system |
| 03/17/1981 | US4256693 Lamination, filters, erythrocytes |
| 03/17/1981 | US4256462 Method and composition for determination of n-nitrosamines |
| 03/11/1981 | EP0024566A1 An apparatus for the analysis of oxygen, nitrogen and hydrogen contained in metals |
| 02/24/1981 | CA1096197A1 Apparatus for measuring excess oxygen or combustibles in a gaseous sample of a combustion process |
| 02/17/1981 | CA1095819A1 Element for analysis of liquids |
| 02/17/1981 | CA1095817A1 Compositions for the detection of hydrogen peroxide |
| 02/11/1981 | EP0023631A1 Means and method for determining the ionic strength or specific gravity of an aqueous test sample |
| 02/10/1981 | US4250257 Automatic determination of hematocrit |
| 02/10/1981 | US4249904 Method and apparatus for extraction of airborne N-nitroso compounds without artifact formation |
| 02/05/1981 | WO1981000303A1 Process for monitoring the history of temperature versus time of deep-frozen product,indicator for applying said process and utilization of said process |
| 02/04/1981 | EP0023230A1 Reagent for the quantitative determination of water, and its use |
| 02/03/1981 | US4248829 Integrated analytical material suitable for simultaneously performing a plurality of analyses |
| 02/03/1981 | US4248598 Process and apparatus for the determination of the contents of organically bound carbon in water containing organic substances and a high concentration of salts |
| 02/03/1981 | US4248597 Ph color change |
| 01/27/1981 | US4247297 Test means and method for interference resistant determination of oxidizing substances |
| 01/27/1981 | CA1094434A1 Process for the quantitative analysis of organoaluminum compounds in their solutions |
| 01/27/1981 | CA1094432A1 Colorimetric assay for bilirubin |
| 01/21/1981 | EP0022623A1 Indicator material |
| 01/20/1981 | US4245997 Detection of gas by color change, warning by an alarm when gas is above or below threshold |
| 01/14/1981 | EP0022284A1 Steam sterilization indicator |
| 01/13/1981 | US4245096 Useful as ph indicators of for the detection of ammonia |
| 01/13/1981 | US4244917 Sample pyrolysis oven |
| 01/13/1981 | US4244696 By a photochemically accelerated oxidation with water |
| 01/13/1981 | US4244695 Process for the quantitative determination of the oxygen demand of water containing oxidizable matter |
| 01/13/1981 | US4244693 Using a acid-base indicator to detect the alkalimetal hydroxide or carbonate, a solvent, and a nonionic surfactant with a light-colored pigment |
| 01/07/1981 | EP0021492A1 Disposable diaper type garment having wetness indicator |
| 01/07/1981 | EP0021407A1 Use of substituted or condensed pyridines in a process for detecting peroxydatively active substances, such a process and diagnostic test strip containing such pyridines |
| 01/07/1981 | EP0021261A1 Test device resistant to cross contamination between reactant areas and process for making it |
| 01/07/1981 | EP0021245A1 Rapid test for detecting ascorbic acid and method for its preparation |
| 12/30/1980 | US4242301 Automated reaction housing for use in quantitative analysis |
| 12/30/1980 | US4242188 Method for controlling plasma chemical reactions |
| 12/23/1980 | US4240926 Thiobarbituric acid and parabanic acid or urea and dimethyl oxalate, inks |
| 12/23/1980 | CA1091987A1 Moisture indicator |
| 12/16/1980 | CA1091560A1 Temperature control system for chemical reaction cell |
| 12/10/1980 | EP0020072A1 Analytical method and apparatus for the determination of the total nitrogen content in a sample |
| 12/10/1980 | EP0019786A1 Chemiluminescent analytical device and its use |
| 12/09/1980 | US4238297 Process for the determination of the content of solid, dissolved and with water immiscible organic substances in water |
| 11/26/1980 | EP0019601A1 Substrate composition and use thereof |
| 11/18/1980 | US4234541 Combustion chamber cleaning apparatus |
| 11/18/1980 | US4234316 Device for delivering measured quantities of reagents into assay medium |
| 11/18/1980 | US4234315 Gas chromatographic analysis method and apparatus |
| 11/18/1980 | US4234313 Device and method for quantitative uric acid testing |
| 11/18/1980 | US4234257 Flame photometric detector adapted for use in hydrocarbon streams |
| 11/11/1980 | US4233029 Controlled fluid flow |
| 11/04/1980 | US4232318 Duplex microwave radio communication system |
| 11/04/1980 | US4231990 Reactor for preparing and analyzing fluids |
| 11/04/1980 | US4231754 Chemiluminescent analytical device |
| 11/04/1980 | US4231370 Disposable diaper type garment having wetness indicator |
| 10/29/1980 | EP0017752A1 Process for making visible stationary fields of heat-transition coefficients by photochemical means |
| 10/28/1980 | US4230671 Apparatus for processing fluid materials particularly in the preparation of samples for radioactive isotope tracer studies |
| 10/28/1980 | US4230457 Impregnated with zinc dust, arsenic trioxide, and water; gold chloride indicating layer |
| 10/21/1980 | US4229180 Process and catalyst for determining nitrogen in a sample according to the Kjeldahl principle |
| 10/21/1980 | CA1087981A1 D and c red 33 as plaque disclosing agent |
| 10/21/1980 | CA1087971A1 Alcohol retainer cartridge and method for using same |