| Patent Number |
Title Of Patent |
Date Issued |
| D346753 |
PH and concentration meter |
May 10, 1994 |
|
| D334208 |
Portable printer |
March 23, 1993 |
|
| 7323091 |
Multimode electrochemical sensing array |
January 29, 2008 |
| A multimode electrochemical sensing array formed on an integrated circuit chip is structured to provide electrochemical determination of acidity or alkalinity, as well as electrochemical and potentiometric measurement of oxidation/reduction potentials, conductivity measurements, electros |
| 6793787 |
Ion-selective electrode |
September 21, 2004 |
| An improved ion-selective electrode with enhanced sensitivity and reliability. The electrode is readily formed from an electrode assembly sealingly joined to the upper end of an electrode chamber whose lower end opens into in a tube bore of substantial path length that provides a con |
| 6350367 |
Calibration method using a stable and safe redox standard solution |
February 26, 2002 |
| The present invention is directed to a stable, non-hazardous solution for calibrating oxidation-reduction potential (ORP) measurement cells. The redox standard calibration solution of the present invention consists essentially of an aqueous solution containing the triiodide/iodide redox |
| 6168707 |
Ion measurement apparatus and methods for improving the accuracy thereof |
January 2, 2001 |
| The accuracy and temperature-independence of ion-selective electrode meters having a logarithm resistance temperature correction incorporated therein is enhanced by using a microprocessor controlled and measured circuit with switched reference and switched capacitor filter, and by adding |
| 6159353 |
Capillary electrophoretic separation system |
December 12, 2000 |
| The present invention provides an electrophoretic separation system on a planar chip of glass or plastic material with on-chip FIA (flow injection analysis) injection and one or multiple sets of electrodes for on-column, end-column, off-column electrical or electrochemical, suppressed or |
| 6126801 |
Low detection limit ion selective membrane electrodes |
October 3, 2000 |
| A new type of ion-selective solvent polymeric or liquid membrane electrode is constructed which allows to extend the measuring range at the lower end by at least six (6) orders of magnitudes. The new method can be used with membranes based on a neutral ionophore, a charged ionophore, or |
| 6068744 |
Combination ISE and solutions therefor |
May 30, 2000 |
| Described is a combination, PVC-membrane, Ion-Selective Electrode (ISE) with a replaceable sensing module and a single-junction, sleeve-type reference electrode. pH and ion-selective electrodes (ISEs) in the "Combination" configuration, i.e., single probes containing both the sensing |
| 5872454 |
Calibration procedure that improves accuracy of electrolytic conductivity measurement systems |
February 16, 1999 |
| Disclosed is a two-point calibration procedure, that when used with a mathematical algorithm, improves the accuracy of electrolytic conductivity measurements by correcting for non-linear behavior of conductivity cells. Unlike purely mathematical means of correcting for non-linearity whic |
| 5840168 |
Solid contact ion-selective electrode |
November 24, 1998 |
| A new substrate for the construction of solid internal contact ion-selective electrode comprising a conductive and porous carbon matrix is described. The well-defined (i.e., fixed) interfacial potential between the organic electroactive phase and the internal reference element, coupl |
| 5830338 |
Combination ISE and solutions therefor |
November 3, 1998 |
| Described is a combination, PVC-membrane, Ion-Selective Electrode (ISE) with a replaceable sensing module and a single-junction, sleeve-type reference electrode. pH and ion-selective electrodes (ISEs) in the "Combination" configuration, i.e., single probes containing both the sensing |
| 5744100 |
Connectorized capillaries for use with separation instrumentation components |
April 28, 1998 |
| A connectorized capillary and in-line flow cell system which greatly expedites the construction of capillary zone electrophoresis (CZE) and other separation instrumentation. A capillary is mounted within a cavity formed in a body, and a mechanical fastener is positioned about the body. |
| 5651876 |
Interference suppressing buffer |
July 29, 1997 |
| The present invention is a reagent which, when added as a conditioning solution to samples containing calcium and magnesium, selectively converts the calcium into a complex which does not interfere with magnesium ISEs, and thus allows accurate magnesium determinations by ISE in a wide va |
| 5494641 |
Connectorized capillaries for use with separation instrumentation components |
February 27, 1996 |
| A connectorized capillary and in-line flow cell system which greatly expedites the construction of capillary zone electrophoresis (CZE) and other separation instrumentation. A capillary is mounted within a cavity formed in a body, and a mechanical fastener is positioned about the body. |
| 5300442 |
Method and device for measuring chlorine concentrations with enhanced sensitivity |
April 5, 1994 |
| A method and apparatus for measuring the amount of residual chlorine in solution with enhanced accuracy. The basic measurement technique involves introducing a solution of iodide ion into the sample to reduce the chlorine, thereby producing a proportionate amount of iodine; measurement |
| 5198093 |
pH and concentration meter |
March 30, 1993 |
| The present invention comprises an electrochemical metering apparatus that provides for convenient storage and presentation of the analytical electrode, simple assembly, and two calibration modes. The apparatus includes an electrode storage and presentation assembly that permits the |
| 5108578 |
pH and concentration meter |
April 28, 1992 |
| The present invention comprises an electrochemical metering apparatus that provides for convenient storage and presentation of the analytical electrode, simple assembly, and two calibration modes. The apparatus includes an electrode storage and presentation assembly that permits the |
| 4688437 |
Electrode holder assembly |
August 25, 1987 |
| An electrode holder assembly is provided for holding test electrodes in a sample container. The assembly comprises a vertically aligned lead screw mounted to rotate freely, and a nut, inserted over the lead screw, adapted to move freely over the length of the lead screw when subject to a |
| 4687500 |
Method for manufacturing an ion-sensitive electrode |
August 18, 1987 |
| The body of an ion-sensitive electrode is formed from a bulb (32) of an ion-selective material that is transparent to infrared radiation. A glass tube (12) made of material that absorbs infrared radiation is inserted into the bulb, and a source (15) of infrared radiation is focused throu |
| 4667523 |
Electrode friction chuck |
May 26, 1987 |
| A friction chuck for securing a test probe within a platform holder. The chuck, formed of elastomeric material, comprises a chuck body with an axially extending bore and a plurality of downward extending fingers disposed around the outer circumference of the projection of the chuck b |
| 4661236 |
Fluid electrode and method of making |
April 28, 1987 |
| An improved electrode for detecting ion concentration and a method of manufacturing such an electrode. The electrode includes concentric glass tubes, including an inner tube which is filled with a filling solution and a larger, outer tube which extends above the level of the filling solu |
| 4600494 |
Ion analyzer calibration cell |
July 15, 1986 |
| Apparatus for calibrating an ion analyzer comprises a calibration cell having defined therein a first volume for measuring an ion concentration of a sample when the instrument is operated in a monitoring and a second volume for measuring the ion concentration when the instrument is opera |
| 4166021 |
Reference electrode |
August 28, 1979 |
| An improved electrochemical reference electrode for use in potentiometric determinations of species in solution. The body of the electrode is composed of a material substantially permeable to liquid water whose exterior surface, excepting a comparatively small area, is covered by a m |
