| 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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| 02/02/1982 | CA1117403A1 Process for the quantitative determination of the carbon of organic compounds in water |
| 01/26/1982 | US4312834 Diagnostic agent for the detection of component materials in liquid and process for producing same |
| 01/26/1982 | CA1116987A1 Process and apparatus for measuring the concentration of gaseous oxygen, carbon monoxide and carbon dioxide in gaseous or liquid samples, in particular in breath and blood samples |
| 01/19/1982 | US4311793 Containers, cultures |
| 01/19/1982 | US4311485 Method and apparatus for photometrically monitoring the concentrations of both chlorine and chlorine dioxide |
| 01/12/1982 | CA1116064A1 Automated reaction housing |
| 01/12/1982 | CA1116063A1 Monitoring device |
| 01/07/1982 | WO1982000056A1 Improved albumin reagent |
| 01/06/1982 | EP0043240A1 Isolation and determination of nitrosoamines |
| 01/06/1982 | EP0043042A1 Device for colorimetrically measuring gaseous traces |
| 01/05/1982 | US4309385 Reaction with mercuric oxide to give atomic mercury measured by ultraviolet spectroscopic analysis |
| 01/05/1982 | US4309186 Hydrophilic film for detection of heavy metals |
| 01/05/1982 | CA1115630A1 Analytical method and apparatus for the determination of nitrogen derived from nitrites or nitrates in aqueous systems |
| 12/30/1981 | EP0042393A1 Chromatographic sheet of layer for pressurized layer chromatographic apparatus. |
| 12/29/1981 | US4308030 Method of determination of alkaline earth metal ions in concentrated alkali metal chloride brines |
| 12/29/1981 | US4308027 Complexing with ferrozine; colorimetric analysis |
| 12/29/1981 | CA1115186A1 Multilayered test device for determining the presence of a liquid sample component, and method of use |
| 12/29/1981 | CA1115185A1 Combustible gas detecting element |
| 12/29/1981 | CA1115184A1 Composition, device and method for determining reducing agents |
| 12/22/1981 | US4307188 Diagnosis and detection device |
| 12/22/1981 | US4306879 Chemical logging of geothermal wells |
| 12/22/1981 | CA1114725A1 Test means and method for interference resistant determination of oxidizing substances |
| 12/15/1981 | US4305906 Apparatus for analyzing oxygen, nitrogen and hydrogen contained in metals |
| 12/15/1981 | CA1114269A1 Integral element for the detection of glycerol or triglycerides |
| 12/15/1981 | CA1114191A1 Nickel carbonyl analyzer |
| 12/09/1981 | EP0041175A2 Ion specific analytical element |
| 12/08/1981 | US4304672 Stored blood and liquid system pH control method and apparatus |
| 12/01/1981 | US4303419 Method and composition for determination of N-nitrosamines |
| 12/01/1981 | US4303409 Method, composition and test strip for colorimetric analysis of ascorbic acid |
| 12/01/1981 | US4303408 Removal of interferents in analytical assays in a two phase interferent-removal zone |
| 12/01/1981 | CA1113472A1 Bis-(2,4-dinitrophenyl)-methyl-pyridinium compounds and the preparation thereof |
| 12/01/1981 | CA1113356A1 Process and diagnostic device for the determination of ammonia and of substrates which react with the formation of ammonia |
| 11/24/1981 | US4302439 Method of disclosing dental plaque with D and C Red 33 |
| 11/24/1981 | US4302299 Intermittent, electric signal of potential |
| 11/24/1981 | CA1113155A1 Duplex microwave radio system |
| 11/17/1981 | US4301413 Circuit arrangement for amperometric titration |
| 11/17/1981 | US4301115 Support with hydrophobic barrier layer with affixed spaced apart reagents responsive to various materials |
| 11/17/1981 | US4300910 Test vial construction and method of measuring gas, vapor and aerosol components in an air sample |
| 11/17/1981 | US4300905 Using a 2,18-phosphomolybdic acid carrier, acid buffer and an alkali chlorate |
| 11/17/1981 | CA1112797A1 Polymeric colour indicators and a method of their preparation |
| 11/04/1981 | EP0039027A1 Chemical compounds, method for their preparation, means containing these compounds and their application |
| 11/03/1981 | US4298569 Irreversible color change with formaldehyde |
| 11/03/1981 | US4298348 Time-temperature indicator composition |
| 11/03/1981 | US4298010 Breathing alcohol testing device |
| 10/27/1981 | US4297106 Rapid method for the measurement of iodine value |
| 10/21/1981 | EP0038205A1 Method for determination of peroxide and test reagent therefor |
| 10/21/1981 | EP0038064A2 Gas analyser for the determination of the ammonia content in a mixture of gases |
| 10/20/1981 | US4296086 Monitoring process and apparatus |
| 10/20/1981 | US4295990 Reagent for the quantitative determination of water |
| 10/20/1981 | US4295856 Nitrosamine specificity for electrolytic conductivity detector |
| 10/20/1981 | US4295853 Method for measuring peroxidic substances |
| 10/20/1981 | CA1110956A1 Catalytic reactor systems method and apparatus |
| 10/20/1981 | CA1110871A1 Method for the determination of the organic carbon content of raw rocks and similar |
| 10/20/1981 | CA1110831A1 Apparatus for the treatment of fluids |
| 10/15/1981 | WO1981002929A1 Ammonia analysis apparatus |
| 10/13/1981 | US4294798 Acid reaction to generate hydrogen |
| 10/13/1981 | US4294583 Highly sensitive gas measuring method for the analysis of breath alcohol concentrations, using test tubes |
| 10/13/1981 | CA1110528A1 Device for detecting serum bilirubin |
| 10/06/1981 | US4293522 Electrophotolysis oxidation system for measurement of organic concentration in water |
| 10/06/1981 | US4293308 Combustion in helium, catalytic oxidation and reduction, gas chromatography, flame photometry |
| 10/06/1981 | CA1110147A1 Diagnostic test strips |
| 09/30/1981 | EP0036798A1 Process for titrating uranium (VI) or dialkyldithiophosphoric acid present in organic solvents |
| 09/30/1981 | EP0036487A1 Karl Fischer reagent without pyridine and method for the determination of water using this reagent |
| 09/29/1981 | US4292272 Multilayer analysis sheet for analyzing liquid samples |
| 09/29/1981 | US4292040 Mixing with acid catalysts, a nonionic surfactant, sulfanilamide, and n/-naphthyl/ethylenediamine |
| 09/29/1981 | CA1109773A1 Diagnostic agent for the detection of ketone bodies in fluids and process for its manufacture |
| 09/22/1981 | US4291122 Biological indicator for sterilization processes |
| 09/22/1981 | US4290776 Method for analyzing acidic substances by high speed liquid chromatography |
| 09/22/1981 | CA1109375A1 Process for detecting the oxidation of keratinized fibers and particularly human hair |
| 09/09/1981 | EP0035311A2 A detector for detecting air components |
| 09/09/1981 | EP0035066A2 Titration reagent for the determination of small water quantities and method for its use |
| 09/08/1981 | US4288344 Stable diazonium salt generator for improved marijuana analysis |
| 09/08/1981 | US4288228 Whole blood analyses and diffusion apparatus therefor |
| 09/08/1981 | CA1108514A1 Test means and assay for determining the urea content of fluids |
| 09/08/1981 | CA1108483A1 Drug detection device |
| 09/02/1981 | EP0034692A2 The use of starch derivatives as indicators |
| 09/01/1981 | US4286965 Containing copper ions, sodium hydroxide, and formaldehyde |
| 08/25/1981 | US4285699 Redox systems |
| 08/25/1981 | US4285697 Food spoilage indicator |
| 08/19/1981 | EP0034049A1 Test device for analysis of a plurality of analytes |
| 08/18/1981 | US4284719 Substrate composition and use thereof |
| 08/12/1981 | EP0033707A1 Element for liquid analysis having interferent-removal zone and method for using same |
| 08/11/1981 | US4283370 And eluting with a mineral acid |
| 08/11/1981 | US4283256 Method and apparatus for measuring the strength of the air/fuel mixture supplied e.g. to an I.C. engine |
| 08/11/1981 | US4283201 Titration |
| 08/04/1981 | US4282183 Combustion system |
| 08/04/1981 | US4282001 Compositions and method for reducing turbidity in samples |
| 08/04/1981 | CA1106207A2 Flow indicator for gas sampling system |
| 07/28/1981 | CA1105781A1 Time watch or depletion indicator for removable substances |
| 07/22/1981 | EP0032469A1 Pipette with positive displacement |
| 07/21/1981 | US4279993 Indicator composition and test device containing amine oxide, and method of use |
| 07/21/1981 | US4279991 Process and apparatus for preparing multi-component reagent solutions |
| 07/21/1981 | US4279773 Quantitatively measuring the hydrogen chloride evolved from a polymer with an ion selective electrode |
| 07/21/1981 | US4279514 Apparatus for the analysis of test tape |
| 07/21/1981 | US4279213 For controlled release agents; pesticides |
| 07/15/1981 | EP0031826A1 Process for monitoring the history of temperature versus time of deep-frozen product, indicator for applying said process and utilization of said process. |
| 07/14/1981 | US4278561 Monitoring shelf life of perishables, polymerization, color change |
| 07/14/1981 | US4278507 As difference between total chlorine and combined chlorine |
| 07/07/1981 | US4277438 Method and apparatus for measuring the amount of carbon and other organics in an aqueous solution |
| 07/07/1981 | US4277368 Sulfur dioxide detector |