Matches 101 - 150 out of 241 < 1 2 3 4 5 >
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5320724 Method of monitoring constituents in plating baths  
A method of monitoring a plating bath which combines ac and dc voltammetry to accurately measure major and trace constituent concentrations. The method involves applying both ac and dc voltammetric...
5312762 Method of measuring an analyte by measuring electrical resistance of a polymer film reacting with the analyte  
The change in electrical resistance of an electroactive polymer such as polypyrrole, polyaniline or polythiophene when it reacts with an analyte is used to measure the analyte. The open circuit...
5298129 Method of selectively monitoring trace constituents in plating baths  
A method of selectively monitoring particular trace constituents within a plating bath containing multiple trace constituents. The method provides improved selectivity over known voltammetric...
5284570 Fluid sample analyte collector and calibration assembly  
A fluid sample collector, sensing, and calibration device contains a collector like a syringe, with one or more analyte sensors, and a calibrator for calibrating the sensor. These can be...
5262305 Interferant eliminating biosensors  
A biosensor including an interferant-eliminating catalyst and method for analyzing an analyte in a biological sample is disclosed.
5246859 Method of stabilizing a carbon dioxide sensor  
The method of stabilizing a carbon dioxide sensor involves formulation of a bicarbonate buffer solution in the sensor with a bicarbonate ion concentration of from about 100 mM to about 200 mM...
5244561 Process and apparatus for the electrochemical determination of pCO.sub.2 in blood  
In a blood gas analyzer, a measurement liquid, advantageously high-purity water, is fed from a suitable vessel to a diffusion cell in which the measurement liquid is brought into contact via a...
5240573 Phosphate selective composition and electrode  
Phosphate ion-sensitive composition and ion-selective electrode are disclosed incorporating an ionophore having the formula: R 1 -X (a) or ...
5238853 Process and apparatus for the electrochemical determination of oxygen in a blood gas analyzer  
In a blood gas analyzer, a substantially oxygen-free measurement solution is fed through a measuring cell as far as a diffusion cell in which the measurement solution is brought into contact with a...
5212092 Storage and calibration solution for multiparameter intravascular blood gas sensor device  
The solution for storage and calibration of an intravascular blood sensor is an aqueous solution of from 10-35 mM of a first buffer component of bicarbonate, and at least one additional buffer...
5200051 Wholly microfabricated biosensors and process for the manufacture and use thereof  
An efficient method for the microfabrication of electronic devices which have been adapted for the analyses of biologically significant analyte species is described. The techniques of the present...
5186798 Solution quantitative analysis apparatus, quantitative analysis methods, and nuclear reactor water quality control system  
This invention comprises electrochemical analytical devices capable of performing electrolysis in multiple pulse modes. It relates to a method of quantitative analysis and equipment for performing...
5174872 Metal-free buffer for ion selective electrode-based assays  
A heavy metal-free composition and its method of use in an ion selective electrode-based assay are disclosed. The heavy metal-free composition includes a borate compound and an alkalinity adjusting...
5139626 Ion concentration measurement method  
An electrochemical cell is formed by immersing an electrochemical ion sensor and a reference electrode into a solution of interest, the electrochemical ion sensor exhibiting ion selectivity with...
5139640 Probe for measuring fluid buffering capacity  
An apparatus and method for measuring the buffering capacity of a fluid which utilizes a pH electrode that is positioned at the surface of a smooth metal working electrode. Measured changes in pH...
5124011 Cyclic voltammetry  
The invention provides a method of monitoring reagent levels in aqueous copper electrolytic solutions. To determine the amount of glue present in an electrowinning solution, potential is applied,...
5120420 Biosensor and a process for preparation thereof  
A biosensor of the invention comprises an insulating base board (1) having formed thereon, in sequence, leads (2, 3, 3'), an electrode system mainly made of carbon (4, 5, 5'), an insulating layer...
5104639 Method for biological testing and/or developing pharmaceuticals for treatment of disorders using electrochromatography  
A method for establishing a treatment protocol for correcting an abnormal condition or disease in a living organism is described. The method comprises the steps of analyzing body fluids from normal...
5081015 Enzyme electrode and method for determination of alcohol content using the same  
An enzyme electrode possessing an immobilized enzyme membrane or an immobilized enzyme layer composed by applying a solution containing alcohol oxidase and a crosslinking agent, in which the...
5074977 Digital biosensors and method of using same  
A mearsuring instrument is disclosed having a reversibly selective binding protein immobilized upon the insulated-gate region of a field-effect transistor located on a sensor. With the sensor...
5071526 Acidic gas sensors and method of using same  
The present invention provides a sensor, preferably an electrochemical sensor, for detecting acidic gases, e.g. carbon dioxide. The electrochemical sensor has a sensing electrode (20, 22), a...
5037737 Analysis by sensor placement in recprocating flow  
A method and apparatus for analyzing a sample to determine an analyte content has a sensor for sensing the analyte positioned between a first and second transducer. The analyte or derivatives...
5030333 Polarographic method for measuring both analyte and oxygen with the same detecting electrode of an electroenzymatic sensor  
Novel polarographic (voltametric) methods for measuring in vivo or in vitro analytes in an animal tissue and oxygen in the sensor enzymatic reaction layer with an electroenzymatic sensor are...
5030334 Ozone measuring method  
Quantitative determination of ozone contained in a fluid by an amperometric method comprises the steps of: (A) providing an amperometric cell having a sensing electrode, a counter electrode, an...
5019229 Method of controlling epoxy resin etchant ion concentration  
A method of and an apparatus for etching an epoxy resin having a high backetching rate, in particular bores with printed circuit boards, with stable, strong, basic alkaline permanganate etching...
5001070 Method for determining the total carbonate content of a fluid  
An electrochemical method for determining the total carbonate content of fluids, especially biological fluids. According to the invention, using an ion-selective electrode, the concentration of...
4985123 In situ polarographic sensor calibration  
A coated polarographic sensor is calibrated by exposing the sensor to calibration media having known temperatures and species chemical potentials. The sensor is allowed to equilibrate with respect...
4985130 Amperometric method and apparatus  
A method for determination of a first electroactive and normally gaseous species (EAGS) and a second EAGS in a fluid medium containing both EAGS; the medium is contacted with a first working...
4963815 Photoresponsive electrode for determination of redox potential  
Devices and methods are provided for determining the presence and amount of an analyte by measuring a redox potential-modulated photoinducing signal from a photoresponsive element. Further devices...
4952300 Multiparameter analytical electrode structure and method of measurement  
An ion sensitive electrode device and method of its use in analytical and clinical chemistry are provided for measuring the concentration of an ionizable analyte contained in an aqueous medium. The...
4948473 Surfactant sensing electrode for potentiometric titrations  
A coated-wire electrode for potentiometrically titrating surfactant molecules having more than ten carbon atoms includes an electrically-conductive core coated with a semipermeable membrane. The...
4935107 Process for electrochemical measurement of the concentration of oxide ions in a bath based on molten halides  
The invention concerns a process and apparatus for electrochemical measurement of the concentration of oxide ions dissolved in a bath based on molten halides. The process is based on impedance...
4929313 Amperometric electrochemical ion sensors and method for determining ion concentration  
Electrochemical devices constructed according to the present invention can be used to convert an ion flux into an electric current for determination of ion concentration. The devices are operated...
4921582 Dissolved oxygen measuring method  
A system for measuring dissolved oxygen in a fluid employs a galvanic electrode operated in a transient mode. In operation, the galvanic electrode is intermittently coupled and decoupled, under...
4919770 Method for determining the concentration of electro-chemically convertible substances  
The invention involves a method for determining the concentration of electro-chemically convertible substances in a solution by means of an analyzer equipped with a test electrode, so that a...
4908105 Flow-compensated electrochemical cell and method of analysis  
A method and an apparatus for measuring concentration of a dissolved substance are disclosed. In accordance with the method, measurements are made with two instruments having different permeability...
4851088 Electrochemical detection of carbon dioxide  
An electrochemical system for the detection of carbon dioxide includes a single cell chamber exposed to the sample medium through a polymeric barrier membrane, a single set of electrodes and...
4846937 Method of detecting carbon dioxide in a gaseous or liquid sample  
A method is disclosed for determining carbon dioxide content in gaseous or liquid samples. A semi-permeable membrane-type sensor comprising a sensor electrode, reference electrode and an...
4841974 Apparatus and method for the examination of a liquid medium  
A measuring canal is provided which is connected to a catheter. The canal includes a measuring sensor and a reference sensor. The catheter includes several lumens that have a common opening to the...
4789436 Method and apparatus for nondestructive in vivo measurement of photosynthesis  
A device for in situ, nondestructive measurement of photosynthesis in live plants and photosynthetic microorganisms is disclosed which comprises a Clark-type oxygen electrode having a substantially...
4786374 Electro-chemical sensors and methods for their manufacture and use  
Improved electrochemical sensors are provided through isostatic processing techniques. Improved electrochemical sensors, especially those suitable for use in metallurgical melts, having, at once,...
4759828 Glucose electrode and method of determining glucose  
An electrode assembly for polarographic assay of glucose in solution having a laminated membrane, the outer membrane being from 1 to 20 μm thick and having a pore size of 10 to 125 Å, the inner...
4753714 Method of optimizing flow pattern and increasing signal-to-noise ratios in electrochemical flow through sensors  
In electrochemical flow through sensors comprising at least one cell for the passage of a fluid for analysis therethrough, the method of optimizing the flow pattern and signal-to-noise ratio...
4740274 Reference liquid comprising CsCl  
There is disclosed a reference liquid for use with (a) a sample liquid to determine ionic activity of analytes, using differential analysis, and (b) two substantially identical dry-operative,...
4735692 Phosphate selective membrane electrode and method of determining phosphate  
A novel ion-selective membrane electrode for the determination of phosphate anions. This device possesses an excellent selectivity for phosphate over many common anions such as sulfate, chloride,...
4711703 Thermal protection method for electroanalytical cell  
A method of thermal protection of a membrane-enclosed amperometric cell of the type comprising an electrolyte within an electrolyte space containing electrodes and enclosed by a semi-permeable...
4696183 Method and apparatus of flow analysis  
A flow path in a flow analyzing apparatus is branched into two or more branch flow paths. In one of the branch flow paths, a flow path blockage detector and an electrolyte measuring electrode are...
4686479 Apparatus and control kit for analyzing blood sample values including hematocrit  
Hematocrit level of a blood sample is measured by flowing the sample along a liquid flow path and using electrodes in the flow path to obtain electrical signals representative of the sample's...
4672971 Oxygen sensor  
An oxygen sensor and method of monitoring the oxygen content of blood or other body fluids are provided, which oxygen sensor and method achieve monitoring of enhanced accuracy that is not...
4666565 Gas sensor and method  
An electrochemical cell for use in the detection and measurement of water soluble gases includes a vessel having a first chamber adapted to receive and contain said gas and having located therein a...
Matches 101 - 150 out of 241 < 1 2 3 4 5 >