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| Number | Title | Issue Date |
| 7189315 | Ion sensor and clinical analyzer using the same An ion sensor has a flow path through which a sample flows. An ion-exchange membrane is in contact with the sample in the sample flow path. An internal solution is provided on one side of the ion-exchange membrane. An internal electrode is provided so as to come in ... | 03/13/2007 |
| 7179398 | Etchant for wires, a method for manufacturing the wires using the etchant, a thin film transistor array substrate and a method for manufacturing the same including the method First, a lower film of AlNd Alloy and an upper film of MoW alloy are deposited in succession, and then patterned by an etchant including HNO3 of 0.1–10%, H3PO4 of 65–55%, CH3COOH of 5–20%, a stabilizer of 0.1–5% an... | 02/20/2007 |
| 7144735 | Electrodialysis method and apparatus for trace metal analysis An electrodialysis method and apparatus are provided for treating a sample including trace metals in a matrix. Advantageously, the present invention allows for highly accurate detection of trace contaminants in a solution sample, in particular trace metals, substant... | 12/05/2006 |
| 7063774 | Recloseable biosensor A biosensor is provided that comprises a substrate, a sample site positioned on the substrate, a cover coupled to the substrate, and biocide positioned between the substrate and the cover. The biosensor may also include desiccant. The cover is operative to selective... | 06/20/2006 |
| 7022071 | Method for measuring the concentration of substances in living organisms using microdialysis and a device for carrying out said method The invention relates to a method for measuring the concentration of substances in living organisms using microdialysis, whereby bodily fluid is mixed with a perfusate and passed through a membrane and a substance value is determined for the bodily fluid with the ai... | 04/04/2006 |
| 6913668 | Electrochemical test strip cards that include an integral dessicant Electrochemical test strip cards that can be singulated to produce electrochemical test strips are provided. The electrochemical test cards are made up of two or more electrochemical test strip precursors, where each precursor is characterized by the presence of a d... | 07/05/2005 |
| 6841060 | Method for quantifying antioxidant levels in food and medical specimens A simple analytical method for determining antioxidant level in food product and body fluids such as urine is based on reduction of elemental iodine. The method adds an aqueous solution of iodine and an iodophor to the sample to be tested. Polyvinylpyrrolidone is a ... | 01/11/2005 |
| 6350524 | Hydrophilic polyurethane-coated chloride-selective electrodes The present invention relates to chloride-selective electrodes which comprise insoluble metal salt layer and a protecting membrane formed of hydrophilic polyurethane thereon, wherein the hydrophilic polyurethane coated chloride-selective electrodes show f... | 02/26/2002 |
| 6248229 | Detection of analytes using reorganization energy The invention relates to novel methods and compositions for the detection of analytes using the nuclear reorganization energy, λ, of an electron transfer process.... | 06/19/2001 |
| 6159745 | Interdigitated electrode arrays for liposome-enhanced immunoassay and test device A test device for detecting or quantifying determining an analyte in a test solution includes an absorbent material having contact, liposome lysing and electrochemical measurement portions. The contact portion is positioned for contact with and uptake of ... | 12/12/2000 |
| 5906719 | Sensor device An amperometric sensor device comprising a working electrode, a reference/pseudo-reference electrode and a permselective membrane incorporating a charged organic species. The electrodes are in intimate contact with the membrane and are on a side of the me... | 05/25/1999 |
| 5700360 | Fluoroelastomer gasket for blood sensors An elastomer, especially a fluoropolymeric elastomer, meets requirements necessary for use as a gasket in contact with primary membranes of electrochemical sensors of both blood gas and ionic species in blood. The elastomer can electrochemically seal an e... | 12/23/1997 |
| 5552032 | Solid state ion selective electrode and method of using the same A solid state ion-selective electrode device to detect a selected ion species in solution an electrode consisting of a homogeneous solid mixture. The mixture is a solid electrolyte composition possessing ionic conductivity and polyvinyl chloride, and opti... | 09/03/1996 |
| 5531870 | Potentiometric ion determinations using enhanced selectivity asymmetric ion-selective membranes This invention relates to a process for performing enhanced selectivity potentiometric ion determinations using an asymmetric ion membrane electrode having an asymmetric membrane with a hydrophilic layer fused to an ion-selective layer.... | 07/02/1996 |
| 5505828 | Calibration solutions useful for analysis of biological fluids and methods employing same Novel calibration solutions are provided which are useful, for example, with sensor assemblies used for analysis of CO2, and optionally, for concurrent analysis of O2, especially in combination infusion fluid delivery/blood chemistry... | 04/09/1996 |
| 5415746 | Potentiometric ion determinations using enhanced selectivity asymmetric ion-selective membrane This invention relates to a process for performing enhanced selectivity potentiometric ion determinations using an asymmetric ion membrane electrode having an asymmetric membrane with a hydrophilic layer fused to an ion-selective layer.... | 05/16/1995 |
| 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 CO2, especially in combination infusion fluid delivery/blood chemistry analysis systems which include a sensor assembly with eac... | 07/19/1994 |
| 5288374 | Method and apparatus for electrochemical analysis and an aqueous solution for use therein A method of electrochemical analysis involves contacting fluid samples of first and second different types in a mixed sequence with an electrochemical sensor, and also contacting the sensor with a standard fluid, in order to measure the values of an analy... | 02/22/1994 |
| 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 |
| 5228973 | Sample diluent for measurement with ion-selective electrodes and method of using the same A body fluid sample is diluted with a diluent which comprises an aqueous solution containing bis(2-hydroxyethyl)-iminotris(hydroxymethyl)methane and boric acid to obtain a diluted body fluid sample, and the ion concentration in the diluted body fluid samp... | 07/20/1993 |
| 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 compound, and is used to dilute a test sample; buffer the... | 12/29/1992 |
| 5112454 | Ion concentration-measuring method The electromotive force of a standard liquid for correction is measured. Both before and after this measurement, the electromotive force of a reference liquid is measured at least once. A calibration curve is prepared based on the resultant data. The cali... | 05/12/1992 |
| 5022980 | System for determining concentration of an electrolyte A system and method for checking the concentration of an electrolyte in a solution utilizing ion-selective electrodes for sequentially measuring potential levels of a sample solution and a correction solution at selected time intervals. The potential leve... | 06/11/1991 |
| 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 without the need for a reference electrode and are specific... | 05/29/1990 |
| 4877492 | Method of measuring electrolyte in blood and urine by electrode method Method of measuring electrolyte concentration in a urine sample, by preparing a calibrating solution containing ions of the electrolytes to be measured, preparing a diluent containing the same ions, diluting the urine sample with the diluent, measuring th... | 10/31/1989 |
| 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 measuring portion to measure an ion-concentration and the like in... | 10/10/1989 |
| 4870024 | Concurrent analysis of a fluid sample for calcium and a monovalent ion A method for determining the concentrations of total calcium and at least one monovalent ion in a sample includes the steps of mixing the sample with a diluent that has a pH within the range pH 6.5 to 7.0 and includes 2-amino-2-hydroxymethyl-1,3-propanedi... | 09/26/1989 |
| 4865698 | Reference solution for measuring ionic activity A reference solution for measuring an ionic activity which is utilized at the time of measuring the activity of a particular ion in an aqueous solution by the differential method using ion-selective electrodes, which is characterized by containing the com... | 09/12/1989 |
| 4680270 | Method and apparatus for conducting flow analysis A single sampling tube is inserted into a whole blood sample contained in a sample cup, and the blood introduced into a switch-valve and a first channel without being diluted. The switch-valve has a volumetric section. In the first channel are arranged a ... | 07/14/1987 |
| 4627893 | Means and methods for quantitative determination of analyte in liquids A testing module is provided having units which can be arranged seriatim to provide narrow through passageways linked to each other for quantitative determination of analytes passing through the units as by electrical testing with electrodes. Auxiliary pa... | 12/09/1986 |
| 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 a concentration larger than or equal to ... | 10/01/1985 |
| 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 polymer, the layer being coated with (d) an ion-selective membr... | 06/12/1984 |
| 4400242 | Electrochemical method of determining oxygen, halothane and nitrous oxide In a method of electrochemically sensing the presence of O2, N2 O and halothane in a fluid, a gold or platinum electrode and a silver electrode are exposed to the fluid through a permeable membrane. both electrodes are held at a first pot... | 08/23/1983 |
| 4019861 | Method and apparatus for measurement of CO2 and chloride in body fluids An improved apparatus and method for detecting CO2 and Cl- in body fluids, such as whole blood, blood serum and plasma, etc. A reagent and a known amount of the sample to be tested react in a vessel to release CO2 into a g... | 04/26/1977 |
