|
Match
|
Document |
Document Title |
|
|
5405510 |
Portable analyte measuring system for multiple fluid samples
A portable, ready-for-use analyte measuring device is provided for the measurement of multiple sequential fluid samples. The device has a disposable cartridge, a calibrating fluid external to the...
|
|
|
5391271 |
Method of monitoring acid concentration in plating baths
A method of monitoring the concentration of certain plating bath major constituents such as acid is provided which is insensitive to the effects of hydrogen produced during plating. The method...
|
|
|
5346606 |
Electrochemical sensor
An electrochemical sensor wherein the salt bridge is a unitary plug of semipermeable material which is saturated with an electrolyte. The plug has a spiral cut from its outer surface to the central...
|
|
|
5330634 |
Calibration solutions useful for analyses of biological fluids and methods employing same
Novel calibration solutions are provided which are useful, for example, with sensor assemblies used for analysis of CO 2 , especially in combination infusion fluid delivery/blood chemistry analysis...
|
|
|
5290408 |
Probe for measuring liquid buffering capacity
An apparatus and method for measuring the buffering capacity of a liquid which utilizes a pH electrode positioned at the surface of a working electrode. Measured changes in pH of the metal-water...
|
|
|
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...
|
|
|
5250163 |
Proton concentration sensor/modulator for sulfonated and hydroxylated polyaniline electrodes
Broadly, the present invention takes advantage of the ability of self-protonated sulfonated polyaniline (SPAN) to sense and/or modulate pH of a medium in the vicinity of a SPAN electrode....
|
|
|
5236568 |
Apparatus for determining the pH of liquids
A method for determining the pH of liquids by a pH difference measurement of a solution under test and a reference solution and an apparatus for determining the pH of liquids is provided which can...
|
|
|
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...
|
|
|
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...
|
|
|
5147524 |
pH sensor
A pH sensor includes a unitary cylindrical semi-porous plug which is formed with a central bore and is also formed with a cavity near a first end of the plug. A pH electrode is positioned in the...
|
|
|
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...
|
|
|
5139641 |
Method of generating a constant derivation potential and a reference electrode in analytical chemistry
In connection with a method for generating a constant derivation potential in analytical chemistry by means of a pH measuring chain containing a reference electrode, in particular for a pH test...
|
|
|
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...
|
|
|
5132000 |
Calibration solution and calibration method for sensor
A calibration solution, which is used when measuring the ion concentration of solution under examination such as blood or other body fluids using a pH sensor or the like ion sensor with a solid...
|
|
|
5081420 |
Method and apparatus for measuring hydrogen ion concentration and activity in an electrolyte
A pH-measuring system using a Barnacle electrode (e.g. Ni--NiO 2 ) in an electrolyte to abstract hydrogen from a metal electrode in the same electrolyte, and produces data as to the time t max ...
|
|
|
5066373 |
Monitoring pH in phenol acetone
Monitoring acidity at the ppm level in phenol-acetone-cumene process streams on a continuous basis is accomplished with a standard hydrogen electrode and a double-junction reference electrode with...
|
|
|
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...
|
|
|
4988418 |
Method of electrically measuring the concentration of acids
In a method for the electrical measurement of the concentration of acids a measurement electrode (11) consisting at least predominantly of crystalline graphite is arranged in an acid (12) having...
|
|
|
4981567 |
Lithium-salt reference half-cell for potentiometric determinations
The present invention provides an electrolyte solution, a reference half-cell, and a complete electrochemical cell particularly useful in making pH measurements of industrial and waste streams...
|
|
|
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...
|
|
|
4936956 |
Microelectrochemical devices based on inorganic redox active material and method for sensing
Novel microelectrochemical devices are provided which consist of closely spaced microelectrodes coated with metal ion based inorganic redox active material such as oxides or mixed oxides of any of...
|
|
|
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...
|
|
|
4886584 |
Potential measuring method and apparatus having signal amplifying multiple membrane electrode
Ionic concentration in a solution is measured using a multiple membrane electrode potential amplification device. The apparatus includes a plurality of potential sensing membranes and reference...
|
|
|
4872956 |
Methods of measuring ion-concentration and the like and a calibrating sheet as well as a calibrating method of measuring devices used therein
A method of measuring an ion-concentration and the like characterized by a sample absorbed in an easily absorbing solution material and the absorbing material is brought into contact with a...
|
|
|
4839000 |
Buffer compensation in enzyme-modified ion sensitive devices
A system suitable for determining the concentration of an enzyme's substrate in a solution 21 containing a buffer comprises two ion-sensitive devices 22, 23, such as ISFETS, in contact with the...
|
|
|
4756804 |
Method of detecting hydrogen cyanide gas in a gaseous or liquid sample
A method of detecting hydrogen cyanide using an electrochemical cell is disclosed. The cell comprises an electrolyte which is initially free of any salt capable of dissociating to form cyanide...
|
|
|
4686011 |
Method for the protection of and/or monitoring of changes in a reference system in analytical measuring engineering, and reference system with a reference electrode
Method for the protection and/or monitoring of a reference system with reference electrode in analytical measuring techniques, and reference system therefor, wherein an additional monitor electrode...
|
|
|
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...
|
|
|
4632732 |
Ion-selective measuring electrode device and method for measuring hydrogen ion
An ion selective electrode device, in particular a pH-sensitive electrode device, employing an intercalation electrode (3) as contact material between an ion selective element (2) and an electrical...
|
|
|
4552625 |
Reference electrode assembly
A new reference electrode assembly is provided that includes a hydrogen ion specific electrode which is encapsulated in a polymer matrix. The bulk of the polymer matrix has an open cell structure...
|
|
|
4545877 |
Method and apparatus for etching copper
A method for etching copper metal from articles, such as printed circuit boards, by contacting the articles with an etchant solution containing cupric tetrammine ions at an etching station,...
|
|
|
4544455 |
Salt bridge liquid
Salt bridge liquid for use in potentiometric measurement of blood or a blood liquid. The salt bridge liquid contains Na + -ions and HCOO - -ions in substantially equimolar amounts, preferably in...
|
|
|
4512853 |
Method of monitoring pH
A method of electrometrically monitoring the pH of an electrolyte in an electrolytic cell with a pH sensor having a reference electrode with a porous membrane is provided by placing the pH sensor...
|
|
|
4461998 |
Ion selective measurements
A reference electrode (102), standard calibration solutions (72 and 76) and a sample solution (80) are all placed in liquid contact with one another and a reference solution (70). Contact between...
|
|
|
4454007 |
Ion-selective layered sensor and methods of making and using the same
A layered half cell comprising (a) an inert insulating substrate having coated thereon (b) a layer of conductive material having coated thereon (c) a layer of carbon dispersed in a dielectric...
|
|
|
4447775 |
Apparatus and method for continuous pH monitoring
An apparatus and method are disclosed for the continuous monitoring of pH in a fluid stream flowing at a low volumetric flow rate. The stream is directed through an enclosed conduit with a glass...
|
|
|
4302299 |
Titration control method
In a titration controlling method and apparatus wherein variations of a titration system caused by intermittent titrations are successively detected electrically, and the quantity of each...
|
|
|
4276323 |
Process for controlling of chemical copper plating solution
A concentration of copper ions, a concentration of a reducing agent, a concentration of a complexing agent and a pH of a chemical copper plating solution are continuously detected all as...
|
|
|
4272245 |
Method and apparatus for electro-chemical measurement
A method and apparatus for measuring a chemical characteristic of a liquid such as its hydrogen ion activity or pH value. A disposable cassette having a reference and indicating electrode therein...
|
|
|
4264328 |
Method for recording measured values in an automatically performed blood gas analysis
The measured values are calculated from the following equation: ##EQU1## in which X 1 , X i +1, X i +2 are three values of signals obtained from one electrode measured successively at equal...
|
|
|
4251218 |
Method of adjusting pH
In a potentiometric system for measuring low levels of ion activity, a method of adjusting the pH in a sample stream by the passive addition of low molecular weight acid or base reagent, without...
|
|
|
4240879 |
Methods of measuring the concentrations of ions
Equipment for measuring the concentration of certain ions, particularly hydrogen ions, is disclosed. The ion sensitive electrodes used in this equipment are far more stable than those previously...
|
|
|
4189367 |
Method for testing ion selective electrodes in continuous measuring systems
The membrane of an ion selective electrode is tested for damage while it is being used for continuous measurement by sending a test current through the electrode system and measuring the voltage...
|
|
|
4182638 |
Coating process with voltammetric sensing of the coating solution
The effective concentration of an electroactive ingredient of a coating solution is determined, and may be restored to a desired level, in response to deviations in the voltammetric current sensed...
|
|
|
4154660 |
Method and apparatus for monitoring sulfide in well drilling mud
An apparatus for measuring electrochemical species in well drilling mud. The apparatus comprises a sulfide electrode, a pH electrode and a reference electrode. An electrical circuit is provided...
|
|
|
4133732 |
Combination electrode system
The hydrogen ion concentration or pH of liquids may be measured, particularly in industrial or municipal processes, by a combination glass electrode system containing a glass electrode, a reference...
|
|
|
4119498 |
Monocrystalline metal electrode and method of use
An improved metal electrode for the determination of pH, P O s or P CO s in liquids is disclosed. The improved electrode consists of a metal sensor (e.g., antimony) in a holder characterized in...
|
|
|
4105509 |
Combination measuring and reference potential electrode and method of measuring pH in samples subject to large voltage gradients
A combination measuring and reference electrode which has a large annular reference junction around the centrally located measuring electrode filled with a gel electrolyte so as to provide an equal...
|