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| Number | Title | Issue Date |
| 7235214 | System and method for measuring molecular analytes in a measurement fluid A molecular contamination monitoring system includes a piezoelectric measurement sensor exposed to a molecular constituent to be measured; a piezoelectric reference sensor; and a filter for filtering said molecular constituent, the filter located between the referen... | 06/26/2007 |
| 7189314 | Method and apparatus for quantitative analysis A sensory apparatus including a substrate including a plurality of sensors to obtain an analyte profile, the sensors including an ion-selective sensor capable of measuring ion content and a chlorine sensor capable of measuring chlorine content, is disclosed. A metho... | 03/13/2007 |
| 7190278 | Asset tag with event detection capabilities Described herein are a transient event detector comprising electrical circuitry suitable to detect a transient event, and a container having a wall with at least two electrically conductive contacts that are electrically connected to the electrical circuitry, each o... | 03/13/2007 |
| 7179653 | Measuring method for concentration of halogen and fluorine compound, measuring equipment thereof and manufacturing method of halogen compound The present invention provided a method for measuring a halogen gas and/or a hydrofluorocarbon for the purpose of controlling the concentration of the halogen gas and/or the hydrofluorocarbon, in a plant producing a halogen compound or a perfluorocarbon, at a predet... | 02/20/2007 |
| 7087150 | Chloramine amperometric sensor A chloramine amperometric sensor includes a sensor body with an electrolyte disposed inside the sensor body. A membrane is coupled to the sensor body and adapted to pass chloramine therethrough. A reference electrode is disposed in the electrolyte and coupled to a f... | 08/08/2006 |
| 6962675 | Use of spatiotemporal response behavior in sensor arrays to detect analytes in fluids Methods, systems and sensor arrays are provided implementing techniques for detecting an analyte in a fluid. The techniques include providing a sensor array including at least a first sensor and a second sensor in an arrangement having a defined fluid flow path, exp... | 11/08/2005 |
| 6960477 | Closed heat-decomposing appliance, pretreatment method of sample using it, analytical method and device therefor Disclosed are a closed heat-decomposing appliance comprising a heating section with one side closed and other side having common ground portion, screw portion or O-ring-mounted portion and a closed introducing section that allows to connect to this heating section a... | 11/01/2005 |
| 6913930 | Analytical method and apparatus therefor involving continuous titration The present invention relates to an improved analytical method and apparatus therefor, in particular to a method and apparatus for continuous titration in which at least one parameter of at least one compound in a test mixture may be monitored as the composition of ... | 07/05/2005 |
| 6913686 | Methods for analyzing solder plating solutions The present invention relates to methods and apparatus for determining concentrations of various inorganic or organic components in solder plating solutions, which include titration or parallel titration methods, direct potentiometry methods, calibration methods, an... | 07/05/2005 |
| 6908536 | Electrochemical sensor A digital electrochemical sensor is provided with a sensor electrode array (1-4) and an operating electronic unit integrated on a chip for processing electrical signals received therefrom. The operating electronic unit includes a potentiostat circuit and a mi... | 06/21/2005 |
| 6902701 | Apparatus for sensing volatile organic chemicals in fluids A chemical-sensing apparatus is formed from the combination of a chemical preconcentrator which sorbs and concentrates particular volatile organic chemicals (VOCs) and one or more chemiresistors that sense the VOCs after the preconcentrator has been triggered to rel... | 06/07/2005 |
| 6372105 | Apparatus for measuring a silver or halogen ion concentration A method of producing a silver halide photographic emulsion in which a silver ion concentration in precipitation of a silver halide emulsion in a precipitation bath is controlled, wherein a precipitation bath in which stirring is conducted rapidly and uni... | 04/16/2002 |
| 6261440 | Interference free biosensor Provided are microparticle forms of carbon, carbon catalysts and carbon-containing electrically conductive materials which are covalently linked to peroxidase. The carbon:peroxidase conjugates are suitable for use as substrates in conventional electrodes.... | 07/17/2001 |
| 6224745 | Process and device for continuously detecting at least one substance in a gaseous or liquid mixture by means of a sensor electrode Processes and devices are disclosed for continuously detecting at least one substance in a gaseous or liquid mixture by means of a sensor electrode to which is applied a variable potential. In an alternative, the substances are concentrated at the surface... | 05/01/2001 |
| 6129831 | Hydrogen peroxide sensor The sensor electrode has a sensing surface intended to contact a liquid medium for continuous measuring, in combination with a counter electrode and a reference electrode, of the hydrogen peroxide concentration over a concentration range from 0.005 mole/l... | 10/10/2000 |
| 6129824 | Electrochemical sensor for the detection of hydrogen chloride The present invention provides an electrochemical sensor for the detection of hydrogen chloride. In general, the electrochemical sensor comprises a housing having disposed therein a working electrode, a reference electrode and a counter electrode. The ele... | 10/10/2000 |
| 5958214 | Electrochemical sensor with a solid electrolyte for measuring the gas concentration The invention relates to an electrochemical sensor to determine the concentration of a gas to be quantified, comprising a housing, a measuring electrode comprising a catalystically active material which causes a reaction of the gas to be quantified, a cou... | 09/28/1999 |
| 5948236 | Determination of chlorate ion concentration using microelectrodes An in-situ procedure is described for measuring chlorate ion concentration in aqueous media containing the same by employing electrodes, particularly microelectrodes which generate a sigmoidal-type response at high chlorate ion concentration, and which ex... | 09/07/1999 |
| 5944969 | Electrochemical sensor with a non-aqueous electrolyte system Accordingly, the present invention provides an electrochemical sensor comprising at least two electrochemically active electrodes, a non-aqueous electrolyte system and a diffusion barrier membrane through which the analyte in its gas phase is mobile but t... | 08/31/1999 |
| 5908546 | Detection of hydrogen chloride The present invention provides an electrochemical sensor for the detection of hydrogen chloride. In general, the electrochemical sensor comprises a housing having disposed therein a working electrode, a reference electrode and a counter electrode. The ele... | 06/01/1999 |
| 5525197 | Electrochemical detector cell, method and pyrolysis furnace An electrochemical detection cell (320), which is usable either for potentiometric or electrolytic conductivity detection, has a capillary (305), which controls electrolyte flow. A gas stream containing detectable substances is input through a non-wettabl... | 06/11/1996 |
| 5460710 | Electro-analysis of liquids and sensing elements for use therein A sensing element, for use in determining the presence and/or concentration of a species in a solution, comprises a flat insulating substrate (10) having at least one thin metallic electrode (16) deposited on it and overlaid with an insulating layer (20).... | 10/24/1995 |
| 5456811 | Method and apparatus for measuring silver ion activity A method of measuring the silver ion activity of a mixed halide solution or dispersion comprises measuring the potential difference between a silver halide coated silver electrode and a reference electrode immersed in the solution or dispersion. Prior to ... | 10/10/1995 |
| 5437773 | Method for monitoring environmental and corrosion A corrosion sensor array incorporating individual elements for measuring various elements and ions, such as chloride, sulfide, copper, hydrogen (pH), etc. and elements for evaluating the instantaneous corrosion properties of structural materials. The exac... | 08/01/1995 |
| 5437772 | Portable lead detector Apparatus and methods for quickly and easily detecting trace amounts of metallic or non-metallic, electro-active substances, and in particular trace amounts of metals, such as lead in a portable, hand-held detector system with single potential control.... | 08/01/1995 |
| 5403451 | Method and apparatus for pulsed electrochemical detection using polymer electroactive electrodes In a first embodiment, a target analyte in solution is detected by exposing the solution to an electrode that includes a conducting electroactive polymer to which a periodic alternating voltage is coupled. Upon exposure to the analyte, an electrode charac... | 04/04/1995 |
| 5393399 | Amperometric measuring device having an electrochemical sensor An amperometric sensor device comprises in combination a sensor (21) having a planar structure obtained by photolithographic techniques and a circuit (22) for measuring the intensity of the electrochemical current generated by the sensor (21). The planar ... | 02/28/1995 |
| 5376243 | Process for the determination of iodine in low concentration in a nitrate solution, particularly a uranyl nitrate solution The invention relates to a process for the determination of iodine in low concentration in a nitrate solution, particularly a uranyl nitrate solution. According to this process, to the sample to be determined is added a reducing agent such as ascorbic aci... | 12/27/1994 |
| 5286358 | Method of analyzing the complexing power of a pickling liquor A method is provided for accurately determining the complexing capacity (or free HF concentration) of a pickling liquor. A sample of pickling liquor is obtained and an excess of ferric ion is added thereto to complex with all of the free HF in the sample.... | 02/15/1994 |
| 5273631 | Method for continuously determining concentration of chloride ions and bromide ions contained in serum A method is disclosed for determining the concentration of chloride ions and bromide ions employing one and the same serum specimen and one measuring electrode assembly consisting of a working electrode, a counter electrode and a reference electrode which... | 12/28/1993 |
| 5230783 | Electrolytic cell and process for the labeling of proteins and peptides An electrolytic cell for the labeling of proteins, peptides and other organic molecules employs a cathodic half cell and an anodic half cell, where a porous working electrode is located in one half cell and a counter electrode is located in the other of t... | 07/27/1993 |
| 5198988 | Method of determining optimum operating conditions in an electrochemical detector and electrochemical detector using the method A method of determining optimum operating potential in an electrochemical detector and an electrochemical detector for performing the method, particularly for use in connection with a liquid chromatograph, are disclosed. A control and data processing unit... | 03/30/1993 |
| 5118398 | Method and an apparatus for detecting ionizable substance The amount of ionizable substance within a stream can be continuously monitored through the use of an ionizable substance detector. The substance is ionized at an electrode producing ions and free electrons. The ions are transported across an ion exchange... | 06/02/1992 |
| 5102528 | Ag2 S membrane, process for its preparation and process for its use in detecting silver or halide ions in solution The invention relates to an Ag2 S crystalline membrane, a process for its manufacture, and a process for its use in detecting silver ions or halide ions. The membrane according to the invention comprises silver sulfide doped with an ion capable... | 04/07/1992 |
| 5002644 | Method for monitoring sulfates and chlorides at low concentration A method for monitoring low anion concentrations, and particularly sulfate concentrations in aqueous solutions is provided which includes the steps of adjusting the pH of the solution to substantially reduce the presence of hydroxides therein, mixing a no... | 03/26/1991 |
| 4992738 | Device for the measuring of gas, vapor or aerosol fractions of a measured gas For the measurement of gas, vapor, or aerosol fractions of a measured gas, the fraction to be determined is absorbed in a reaction solution, and a change of resistance from a reaction between the fraction and the reaction solution is determined as the mea... | 02/12/1991 |
| 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 anions which form graphite intercalation compounds with grap... | 01/29/1991 |
| 4988948 | Method for the automatic line calibration of a sensor for measuring the concentration of a liquid phase dissolved electrochemical substance A method for the automatic line calibration of an electrochemical sensor for measuring the concentration of a liquid phase dissolved electrochemical substance flowing into a pipe and is characterized by the following stages: upstream of the electrochemica... | 01/29/1991 |
| 4942133 | Procedure for the continuous analysis of the chloride ions present in the overhead waters of a hydrocarbon distillation column Procedure and apparatus for the continuous analysis of the chloride ion content of overhead waters downstream of a hydrocarbon distillation column for more effectively preventing hydrochloric acid corrosion of downstream equipment while avoiding over-neut... | 07/17/1990 |
| 4818348 | Method and apparatus for identifying and quantifying simple and complex chemicals A portable instrument for use in the field in detecting, identifying, quantifying, and monitoring gas, liquid or solid materials is disclosed. The instrument may analyze either liquids or gases depending upon the type of sensor array therein. The instrume... | 04/04/1989 |
