Patents
Sitemap › G01 - Measuring; Testing › G01N - Investigating or analysing materials by determining their chemical or physical properties › G01N 27 - Investigating or analysing materials by the use of electric, electro-chemical, or magnetic means
Patents for G01N 27 - Investigating or analysing materials by the use of electric, electro-chemical, or magnetic means (109,839)
03/1991
03/13/1991CN1012015B Debris detector
03/13/1991CA2025052A1 High performance microcapillary gel electrophoresis
03/13/1991CA2020529A1 Water-cut monitoring means and method
03/12/1991US4999582 Biosensor electrode excitation circuit
03/12/1991US4999492 Inductively coupled plasma mass spectrometry apparatus
03/12/1991US4999340 Rehydratable agarose gels
03/12/1991US4999284 Enzymatically amplified piezoelectric specific binding assay
03/12/1991US4999162 High temperature flame jet for gas chromatography
03/12/1991US4998431 Field usable calibrator for humidity meters
03/12/1991CA1281206C Moisture monitoring system
03/07/1991WO1991003068A1 Method of preparing a sample for analysis
03/07/1991WO1991002970A1 Electrochemical sensor
03/07/1991WO1991002969A1 Method for detecting wear on metal assemblies having inert coatings thereon
03/07/1991WO1991002815A1 Process and device for separating and detecting constituents of a mixture of substances by temperature gradient gel electrophoresis
03/07/1991WO1991002576A1 Blotting technique for membrane assay
03/07/1991WO1991002485A1 Microelectrodes and their use in a cathodic electrochemical current arrangement with telemetric application
03/07/1991DE4017805A1 Preparing thin film of analyte for examination - by laser desorption from surface e.g. of electrophoretic gel plate, chromatography plate or bio:sensor
03/07/1991DE4014497C1 Plug connector for pH probe - has metallic tubular pieces which are earthed to provide good shielding
03/06/1991EP0415726A1 Streaming current detector and fluid treatment system using same
03/06/1991EP0415393A1 Method and apparatus for reviving an electrode of a biosensor
03/06/1991EP0415388A2 Method and apparatus for reviving an electrode of a biosensor
03/06/1991EP0415007A1 Oxygen sensor especially for engine exhaust gases
03/06/1991EP0414924A1 Device for determining the parameters of developing surface cracks
03/06/1991EP0414665A1 Terminal member for o 2? sensor
03/06/1991EP0414664A1 Heated o 2? sensor having isolated ground
03/06/1991EP0217884B1 Relative air humidity measurement device
03/06/1991EP0191798B1 Method and apparatus for monitoring redox reactions
03/06/1991CN2072688U Work voltage-stabilizing electrophoresis instrument
03/06/1991CN2072687U Precision hygrothermograph
03/06/1991CN1011917B Method for determining every gas concentration in mixing gas and sensor of measuring thermal conductivity
03/06/1991CA2024573A1 Magnetic particle inspection field strength indicator
03/05/1991US4998070 Method and apparatus for testing a dielectric coating
03/05/1991US4998068 Bias current control for providing accurate potentiometric measurements
03/05/1991US4998016 Probe unit, driving method thereof, and scanning device for detecting tunnel current having said probe unit
03/05/1991US4997627 Sample analysis
03/05/1991US4997541 Electrode and counterelectrode; partitioned housing; colorimetric analysis
03/05/1991US4997537 High performance microcapillary gel electrophoresis
03/05/1991US4997536 Control of electrokinetic potential by treatment with redox agents
03/05/1991US4997526 Electrolytic oxidation or reduction
03/05/1991US4996993 In vivo osmometer
03/05/1991CA1281072C Reference electrode
03/01/1991CA2024322A1 Pacman quench detector
03/01/1991CA2024092A1 Integrated temperature control/alignment system for high performance capillary electrophoretic apparatus
02/1991
02/28/1991DE3927499A1 Eddy current tube testing by aligned coils - coupled with saw-tooth generator supplying data to coordinate writer
02/28/1991DE3927283A1 Elektrochemischer messfuehler Electrochemical measurement sensor
02/28/1991DE3910038A1 Sensor arrangement having increased sensitivity stability
02/27/1991EP0414571A1 Method for detecting wear on metal assemblies having inert coatings thereon
02/27/1991EP0414033A1 Method for continuous electrolyte transfer and reference electrode system
02/27/1991EP0414032A1 Electrode holding structure for immersion-, flow-through- or fixed-measuring systems in analytical chemistry
02/27/1991EP0413962A1 Imaging screen for electrophoresis applications and apparatus for the visualisation of the image
02/27/1991EP0413742A1 Detection method
02/26/1991US4996658 Self-calibrating glass container inspection machine
02/26/1991US4996486 Method and apparatus for inspecting laminated iron core stacks for interlamination shorts
02/26/1991US4996160 Method and apparatus for quantitative measurement of ionic and organic contaminants remaining on cleaned surfaces
02/26/1991US4995960 Electrochemical electrodes
02/26/1991US4995959 Measuring apparatus for determination of the activity or of the concentration of ions in solutions
02/26/1991US4995957 Rotating electrodes
02/26/1991US4995939 Method and apparatus for determining the layer thickness of semiconductor layer structures
02/26/1991US4995731 Method for measuring heat transfer coefficient and sensor including heat transfer element and thermal insulation element
02/26/1991US4995402 Analyte sensor
02/26/1991US4995391 Electrode device
02/26/1991US4995256 Zirconia cell O2 sensor for respiratory gas analysis
02/26/1991CA1280804C Particulate measuring system
02/24/1991CA2019505A1 Process for rapidly determining the solids content in drilling fluids
02/22/1991CA2016904A1 Process for rapidly determining the swelling-clay content of cement mixtures
02/21/1991WO1991002245A1 Oxygen sensor
02/21/1991WO1991002244A1 Nucleic acid fractionation by counter-migration capillary electrophoresis
02/21/1991WO1991002243A1 A method and a monitor for detecting combustible gases
02/21/1991DE3927467A1 Sepn. and detection of mixts. - by temp. gradient gel electrophoresis using either a spatial or temporal temp. gradient
02/20/1991EP0413419A1 Electrochemical cell for sensing fluids
02/20/1991EP0413232A2 Holder for electrodes for a measuring system to be plunged and immersed, made of several elements, in analytical chemistry
02/20/1991EP0413042A1 Method of producing micromechanical sensors for the AFM/STM profilometry and micromechanical AFM/STM sensor head
02/20/1991EP0413041A1 Method of producing micromechanical sensors for the AFM/STM profilometry and micromechanical AFM/STM sensor head
02/20/1991EP0413040A1 Method of producing ultrafine silicon tips for the AFM/STM profilometry
02/20/1991EP0231239B1 Method for electrophoretic separation
02/20/1991CN2071787U General ion-electric potential extraction apparatus
02/19/1991WO1991002598A1 Paint conductivity measurement system
02/19/1991US4994751 System for assessing lachrymal fluid content of a sample pad
02/19/1991US4994748 Surface ionization detector for analyzing gas mixtures
02/19/1991US4994742 Hall effect device and magnetic coil circuits for magnetic field detection
02/19/1991US4994397 Contactor electrodes wired through speaker or variable oscillator to amplifier, producing patterns of coded pulses
02/19/1991US4994167 Biological fluid measuring device
02/19/1991US4994166 Single apparatus for slab gel electrophoresis and blotting
02/19/1991US4994165 Liquid junction coupling for capillary zone electrophoresis/ion spray spectrometry
02/19/1991US4994161 Equilibrium electrophoresis
02/19/1991US4994158 Method for analyzing a gas mixture
02/19/1991US4994156 Perfluoropolyethers, fluorinated surfactant and hydrogenated alcohol
02/19/1991CA2038955A1 Paint conductivity measurement system
02/19/1991CA1280295C Sensor for measurement electrical heating
02/16/1991WO1991002577A1 Blotting methods using polyaldehyde activated membranes
02/16/1991CA2059549A1 Blotting methods using polyaldehyde activated membranes
02/14/1991DE3926687A1 Continuous electrophoresis appts. - for elution of fractions sepd. by electrophoresis without destroying the gel
02/14/1991DE3926027A1 PH or redox measurement transducer tester - uses second, monitoring transducer with immersion bell contg. electrodes and diaphragm
02/13/1991EP0412746A2 Fluid testing device and method
02/13/1991EP0412301A1 Boron nitride membrane in wafer structure
02/13/1991CN2071340U Electrolysis used in line potential gradient detector
02/13/1991CN1049228A Surface ionization tester for analysing mixed gases
02/13/1991CN1011616B Method for detecting of damage of corrosionresistant protective layer and measuring device for performing method
02/12/1991WO1991002242A1 Self-supporting thin-film filament detector, process for its manufacture and its applications to gas detection and gas chromatography
02/12/1991US4992965 Circuit arrangement for the evaluation of a signal produced by a semiconductor gas sensor
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