An ion selective electrode assembly () comprises an ion selective electrode () provided as a solid pellet of polycrystalline electrolyte material with inert conductive and polymeric binding agent additives. The ion selective electrode () includes a first face (), a second face (), and at least one sidewall (). An integral sealing surface () is electrolytically formed on the sidewall of the ion selective electrode (). The integral sealing surface () may also be formed on a portion of the second face () of the ion selective electrode (). The assembly () further comprises a housing () for receiving the ion selective electrode. An adhesive () is positioned between the integral sealing surface () and the housing (). The adhesive () bonds the ion selective electrode to the housing.
Method For Treating Electrodes And Improved Electrochemical Cell
Radhakrishna M. Neti - Brea CA John N. Harman - Placentia CA
Assignee:
Beckman Industrial Corporation - La Habra CA
International Classification:
G01N 2746 B05D 302
US Classification:
204415
Abstract:
An improved electrochemical cell is described which comprises at least one electrode having increased signal strength achieved by treating at least the working surface of the electrode with a coating of a polytetrafluoroethylene and a catalyst metal selected from the group consisting of platinum and the oxides thereof in an aqueous oligosaccharide solution. Following coating, the electrode is heated to a temperature below the sintering temperature of the polymer to thermally convert the oligosaccharide in the presence of the catalyst metal and drive off the conversion products. An electrode thus treated exhibits a substantially inproved signal strength as compared to an electrode of the same construction which has not been treated in accordance with the invention.
Sterilizable Ph Electrode And Method For Producing The Same
John N. Harman - Placentia CA Radhakrishna M. Neti - Brea CA
Assignee:
Beckman Instruments, Inc. - Fullerton CA
International Classification:
G01N 2736
US Classification:
204408
Abstract:
A pH electrode which is capable of withstanding repeated exposures to sterilizing temperatures. An electrode body having a pH sensing member is at least partially filled with a bed of electrochemically inert particles. After an internal reference is inserted into the particle bed, the bed is injected with a quantity of electrolyte which is sufficient to establish continuity between the sensing member and the internal reference, but which is not sufficient to produce destructive internal pressures when the electrode is subjected to sterilizing temperatures. The electrode is completed by forming a seal between the electrode body and the internal reference.
Amperometric Gas Sensor, Cathode Assembly Therefor And Method Of Making Said Cathode Assembly
An improved electrode assembly for use in amperometric gas sensors. A portion of the interior of the electrode assembly that is adjacent to the electrode is filled with an electrochemically inert water-repellant fluid. Once the fluid is in place, a fluid barrier is inserted to cover the fluid and to serve as a foundation for the introduction of a sealing compound. A pressure relief structure, such as a gas bubble, may be provided within the fluid to relieve the pressures incident to the thermal expansion and contraction of the electrode assembly. Because of the water repellancy of the fluid, the electrolyte solution which surrounds the electrode assembly is prevented from migrating into the interior thereof and thereby initiating output current errors.
Solid State Ion-Sensitive Electrode And Method Of Making Said Electrode
Radhakrishna M. Neti - Brea CA John N. Harman - Placentia CA
Assignee:
Beckman Instruments, Inc. - Fullerton CA
International Classification:
G01N 2736
US Classification:
204195G
Abstract:
A solid state ion-sensitive measuring electrode is disclosed in which a filler solution comprising sodium silicate is provided between an outer glass membrane of the electrode and an internal metallic wire which serves as a conductor from the electrode to a meter. The filler solution is inserted into the electrode as a liquid, and is subsequently dehydrated to provide a permanent solid-state matrix which is electrically conducting between the outer glass membrane and the internal wire.
Gas Analysis Instrument Having Flow Rate Compensation
An apparatus for compensating for changes in the mass flow rate of a sample gas stream in gas analysis instruments having outputs that are calibrated in terms of the concentration of a component of the sample stream. In instruments in which a pressure regulated sample gas stream is applied to a detector assembly through a flow restrictor such as a sample capillary, a gas flow sensor is connected in series with the flow restrictor to develop a correction signal that varies in accordance with the mass flow rate of the sample stream. A correcting circuit combines the correction signal from the flow sensor with the output signal from the detector assembly to produce a corrected output signal that correctly indicates the concentration of the component of interest.
John P. Frain - Costa Mesa CA John N. Harman - Placentia CA Radhakrishna M. Neti - Brea CA
Assignee:
Beckman Instruments, Inc. - Fullerton CA
International Classification:
B01D 3904
US Classification:
55316
Abstract:
A method of analyzing nitric oxide (NO) in a gas stream containing nitrogen dioxide (NO. sub. 2) and a scrubber apparatus for selectively removing nitrogen dioxide from a gas stream containing nitric oxide. The scrubber apparatus comprises a container having an inlet port for the gas stream and an outlet port. The scrubber material in the container includes silver carbonate whereby the scrubber has an efficiency of at least about 99% and a capacity of about 11. 5 parts per million hours of 99% nitrogen dioxide removal per gram of silver carbonate. The method involves passing the gas stream through a scrubber material containing silver carbonate so as to remove nitrogen dioxide from the gas stream while passing the nitric oxide unattenuated and thereafter conveying the gas stream from the scrubber material to an analyzer for nitric oxide. The gas stream is analyzed with the analyzer to determine the nitric oxide concentration therein.
John N. Harman - Placentia CA R. Murty Neti - Brea CA
Assignee:
Beckman Industrial Corporation - Cedar Grove NJ
International Classification:
G01N 2736
US Classification:
204420
Abstract:
A normal pH sensitive glass electrode is deactivated by exposure to thermal treatments at relatively high temperatures of approximately 190. degree. C. for predetermined periods of time until the nominal electrode sensitivity is reduced to very low levels such that the output potentials of such deactivated glass electrode approach the characteristics desired for a theoretically perfect reference electrode. Additionally, a method of forming a deactivated pH glass electrode including the steps of exposing a normal pH or other ion sensitive glass electrode to high temperatures in the order of 190. degree. C. or higher for predetermined periods of time is disclosed. Additionally, there is disclosed an electrode measuring assembly for use in a potentiometric measuring system including, a vessel having a sample solution to be measured therein and a pH measuring electrode pair consisting of a normal pH sensitive glass electrode half cell and a deactivated pH glass electrode half cell disposed in spaced relation and immersed in the sample solution in said vessel, to be measured. The respective normal pH sensitive glass electrode half cell and the deactivated pH glass electrode are calibrated by suitable buffer solutions and a variable span analyzer before the electrode measuring assembly is connected into the potentiometric measuring system.
Resumes
Senior Graphic Artist At Gannet Government Media Corporation
Art Director at EX2 Adventures, Senior Graphic Artist at Gannett Government Media Corporation
Location:
Springfield, Virginia
Industry:
Graphic Design
Work:
EX2 Adventures since 2000
Art Director
Gannett Government Media Corporation since Nov 1999
Senior Graphic Artist
The Connection Newspapers Jun 1997 - Nov 1999
Paginator/Designer
Dr. Harman graduated from the University of Pennsylvania School of Medicine in 1969. He works in Ewing, NJ and 1 other location and specializes in Internal Medicine and Pulmonary Disease. Dr. Harman is affiliated with Capital Health Regional Medical Center.
Washington Grove Elementary School Gaithersburg MD 1970-1977, Summit Hall Elementary School Gaithersburg MD 1972-1973, Gaithersburg Middle School Gaithersburg MD 1977-1978, Montgomery Village Middle School Gaithersburg MD 1978-1980
Middletown-North High School Middletown NJ 1957-1961
Community:
Vita Bua, Cynthia Apfelbaum, Susan Beyer, Barbara Petrillo, Dan Lekander, Dolores Vitolo, Rich Kingston, Thomas Wilton, Terrie Phillips, Marilyn Olsen, Les Barr
North Raleigh Christian Academy Raleigh NC 1998-2002
Community:
Jordan Schmid, Whitney Davis, Juliet Jones, Margaret Moore, Erin Boush, Ryan Mullaney, Christine Skaar, Courtney Brooks, Barrett Brumley, Christi Thorn, Robert Borka, Jessica Johns