Patents by Inventor Yasukazu Iwamoto

Yasukazu Iwamoto has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20220268726
    Abstract: A water quality measuring system includes a first introduction section for introducing rearing water as a sampling target, and a first adding section which adds an acid to the rearing water introduced by the first introduction section, and a nitrous acid sensor whose measurement target is nitrous acid and which measures the measurement target concentration of the rearing water to which the acid has been added by the first adding section. The water quality measuring system includes a second adding section which adds a base to the rearing water introduced by the first introduction section, and an ammonia sensor whose measurement target is ammonia and which measures the measurement target concentration of the rearing water to which the base has been added by the second adding section.
    Type: Application
    Filed: July 14, 2020
    Publication date: August 25, 2022
    Inventors: Yoji TAKEHIRO, Kazusei TAMAI, Gray Lawrence Sirosi PUTRA, Keisuke TASHIMA, Shunsuke KAMEI, Junji KOJIMA, Yasukazu IWAMOTO, Hiroshi NAGAI
  • Patent number: 9377429
    Abstract: This invention relates to a correction liquid for a liquid membrane type ion-selective electrode that makes it possible to measure a ratio between a sodium ion concentration and a potassium ion concentration in urine by correcting for an influence from an ionic strength of the urine. The correction liquid comprises a sodium ion-sensitive part that selectively reacts with the sodium ion and a potassium ion-sensitive part that selectively reacts with the potassium ion, and measures a ratio between a sodium ion concentration and a potassium ion concentration in urine, and comprises the sodium ion, the potassium ion, and an electrolytic ionic strength modifier.
    Type: Grant
    Filed: December 26, 2012
    Date of Patent: June 28, 2016
    Assignee: HORIBA, Ltd.
    Inventor: Yasukazu Iwamoto
  • Patent number: 9151727
    Abstract: This invention relates to a liquid membrane type ion-selective electrode that can restrain an electric potential fluctuation of an inner electrode due to ultraviolet rays and that can conduct an analysis with high accuracy. The liquid membrane type ion-selective electrode comprises a liquid membrane type ion-sensitive membrane wherein a predetermined ionophore is supported by a base material, an inner electrode that has electrical conductivity and that is arranged at a position on the ion-sensitive membrane through which light transmitted is incident, an internal solution that contains an electrolyte and that makes contact with the ion-sensitive membrane and the inner electrode, wherein the ion-sensitive membrane contains an ultraviolet absorber or an ultraviolet reflecting agent having an insulative property.
    Type: Grant
    Filed: December 26, 2012
    Date of Patent: October 6, 2015
    Assignee: HORIBA, Ltd.
    Inventor: Yasukazu Iwamoto
  • Patent number: 9063071
    Abstract: In order to provide a planar type multi-ion sensor which is easily thinned and has high measurement accuracy, a multi-ion sensor 1 adapted to measure a concentration ratio of sodium ions to potassium ions in a sample solution, includes: a sodium ion electrode 41 selectively reacting to the sodium ions; a potassium ion electrode 42 selectively reacting to the potassium ions; and a common electrode 28 in contrast with the sodium ion electrode 41 and the potassium ion electrode 42, wherein the sodium ion electrode 41, potassium ion electrode 42 and common electrode 28 are provided on the same support body, the common electrode 28 does not include internal solution, and the concentration ratio of the sodium ions to the potassium ions is measured based on a variable A that is obtained by the following Equation (1), FIG . ? 7 A = E Na Q × ? Na - E K Q × ? K .
    Type: Grant
    Filed: October 11, 2013
    Date of Patent: June 23, 2015
    Assignee: HORIBA, LTD.
    Inventors: Yasukazu Iwamoto, Hiromi Ohkawa
  • Patent number: 8758586
    Abstract: The present invention is intended to enable silver ions in an internal electrolyte solution of a reference electrode to be suppressed from being eluted, and also suppress a potential variation that occurs due to production of a poorly-soluble silver compound on surfaces of a liquid communication part and the like, and specifically provided with: an internal electrode formed of a silver/silver chlorides electrode; an internal electrolyte solution that is in contact with the internal electrode; and a containing body that contains the internal electrolyte solution, in which the containing body is formed of a material that does not have anionic conductivity but has cationic conductivity and moisture permeability.
    Type: Grant
    Filed: December 14, 2011
    Date of Patent: June 24, 2014
    Assignee: Horiba, Ltd.
    Inventor: Yasukazu Iwamoto
  • Publication number: 20140170764
    Abstract: The present invention is mainly intended to provide a pretreatment system that can use an calcium ion electrode to accurately measure calcium ion concentration with a simple configuration, and the pretreatment system is a pretreatment system 1 that is intended to perform pretreatment before measuring calcium ion concentration in a sample solution containing a calcium compound with a calcium ion electrode, and provided with: an acid adding mechanism 3 that adds acid to the sample solution; and a base adding mechanism 4 that adds base to the sample solution added with the acid.
    Type: Application
    Filed: September 3, 2013
    Publication date: June 19, 2014
    Applicant: HORIBA, Ltd.
    Inventors: Keiko KUWAMOTO, Yasukazu IWAMOTO, Takashi AOMI
  • Publication number: 20140105788
    Abstract: In order to provide a planar type multi-ion sensor which is easily thinned and has high measurement accuracy, a multi-ion sensor 1 adapted to measure a concentration ratio of sodium ions to potassium ions in a sample solution, includes: a sodium ion electrode 41 selectively reacting to the sodium ions; a potassium ion electrode 42 selectively reacting to the potassium ions; and a common electrode 28 in contrast with the sodium ion electrode 41 and the potassium ion electrode 42, wherein the sodium ion electrode 41, potassium ion electrode 42 and common electrode 28 are provided on the same support body, the common electrode 28 does not include internal solution, and the concentration ratio of the sodium ions to the potassium ions is measured based on a variable A that is obtained by the following Equation (1), Fig .
    Type: Application
    Filed: October 11, 2013
    Publication date: April 17, 2014
    Applicant: HORIBA, Ltd.
    Inventors: Yasukazu IWAMOTO, Hiromi OHKAWA
  • Patent number: 8608917
    Abstract: A reference electrode for improving a product life cycle without using a gelled hydrophobic ionic liquid having a prescribed hardness or viscosity and without having a large thickness so as to be difficult to manufacture is provided. The reference electrode is provided with a housing for accommodating an internal electrode, a filler for electrically connecting the internal electrode, and a sample liquid. The filler is formed having a layer between the internal electrode and an opening formed in the housing for contacting the sample liquid and the filler. The filler includes a first layer including a water soluble electrolytic solution formed to be in contact with the internal electrode a second layer including a hydrophobic ionic liquid formed to be in contact with the first layer; and a third layer including a gelled hydrophobic ionic liquid formed in the opening so as to be in contact with the second layer.
    Type: Grant
    Filed: August 25, 2011
    Date of Patent: December 17, 2013
    Assignee: HORIBA, Ltd.
    Inventors: Manabu Shibata, Yasukazu Iwamoto
  • Patent number: 8486246
    Abstract: This invention provides a reference electrode that can be downsized and stable in voltage. The reference electrode in accordance with this invention is a reference electrode that does not require an internal aqueous solution such as a KCl aqueous solution and comprises a metal body, a slightly soluble salt film that comprises a slightly soluble salt of the metal body and that coats the metal body and a hydrophobic ionic liquid that is arranged to make contact with both the slightly soluble salt film and a sample to be measured.
    Type: Grant
    Filed: September 13, 2007
    Date of Patent: July 16, 2013
    Assignee: HORIBA, Ltd.
    Inventors: Takashi Kakiuchi, Satoshi Nomura, Mikito Yamanuki, Yasukazu Iwamoto, Manabu Shibata
  • Publication number: 20130153417
    Abstract: A reference electrode for improving a product life cycle without using a gelled hydrophobic ionic liquid having a prescribed hardness or viscosity and without having a large thickness so as to be difficult to manufacture is provided. The reference electrode is provided with a housing for accommodating an internal electrode, a filler for electrically connecting the internal electrode, and a sample liquid. The filler is formed having a layer between the internal electrode and an opening formed in the housing for contacting the sample liquid and the filler. The filler includes a first layer including a water soluble electrolytic solution formed to be in contact with the internal electrode a second layer including a hydrophobic ionic liquid formed to be in contact with the first layer; and a third layer including a gelled hydrophobic ionic liquid formed in the opening so as to be in contact with the second layer.
    Type: Application
    Filed: August 25, 2011
    Publication date: June 20, 2013
    Applicant: HORIBA, LTD.
    Inventors: Manabu Shibata, Yasukazu Iwamoto
  • Patent number: 8436622
    Abstract: Disclosed are a measurement method and a measurement apparatus both of which can measure the content of water or an organic acid in a polar organic solvent with high accuracy even when water or the organic acid is contained in the polar organic solvent at a low content. The content of water or an organic acid in a polar organic solvent can be measured by using, as a work electrode, an ISFET electrode in which a thin film comprising an oxide or nitride of a metal or metalloid element belonging to Groups 3 to 15 is formed on a gate.
    Type: Grant
    Filed: December 26, 2008
    Date of Patent: May 7, 2013
    Assignee: Horiba, Ltd.
    Inventors: Yuji Nishio, Yasukazu Iwamoto
  • Patent number: 8262877
    Abstract: Disclosed is a sensitive glass for use in a pH-sensitive glass electrode, which comprises at least Me2O3 (Me represents a lanthanoid) and further comprises Y2O3 or Sc2O3 in an amount smaller than that of the Me2O3. Also disclosed is a sensitive glass for use in a cation-sensitive glass electrode, which comprises at least Y2O3 or Sc2O3.
    Type: Grant
    Filed: September 6, 2007
    Date of Patent: September 11, 2012
    Assignee: HORIBA STEC, Co., Ltd.
    Inventors: Yasukazu Iwamoto, Yuji Nishio
  • Patent number: 8206567
    Abstract: A reference electrode traps silver ions and chloro complex ions leaching to an internal filling solution so that the blocking of the liquid junction can be prevented. A silver/silver chloride electrode can be provided as an internal electrode in an internal filling solution; and a tube which houses, in order from top to bottom, the internal electrode, an inorganic cation exchanger for trapping silver ions and/or chloro complex ions from leaching from the internal electrode, and a ceramic member for preventing the diffusion of the silver ions and/or the chloro complex ions to the internal filling solution.
    Type: Grant
    Filed: August 1, 2007
    Date of Patent: June 26, 2012
    Assignee: Horiba, Ltd.
    Inventors: Yasukazu Iwamoto, Naomi Kitaoka
  • Publication number: 20120152741
    Abstract: The present invention is intended to enable silver ions in an internal electrolyte solution of a reference electrode to be suppressed from being eluted, and also suppress a potential variation that occurs due to production of a poorly-soluble silver compound on surfaces of a liquid communication part and the like, and specifically provided with: an internal electrode formed of a silver/silver chlorides electrode; an internal electrolyte solution that is in contact with the internal electrode; and a containing body that contains the internal electrolyte solution, in which the containing body is formed of a material that does not have anionic conductivity but has cationic conductivity and moisture permeability.
    Type: Application
    Filed: December 14, 2011
    Publication date: June 21, 2012
    Applicant: HORIBA, LTD
    Inventor: Yasukazu IWAMOTO
  • Patent number: 8197651
    Abstract: Disclosed is an ion-selective electrode having excellent mechanical strength, excellent durability, low membrane resistance and good ion response accuracy. This ion-selective electrode comprises a response glass membrane which has ion selectivity and is made of an oxynitride glass containing Li.
    Type: Grant
    Filed: December 17, 2008
    Date of Patent: June 12, 2012
    Assignee: Horiba, Ltd.
    Inventors: Yuji Nishio, Yasukazu Iwamoto
  • Patent number: 8080315
    Abstract: An ion-selective electrode has a responsive glass membrane with an exterior thin film containing titanium dioxide of an anatase type that is continuously formed as an integrated body. The thin film, of several hundred nm in numbers, is electrically connected by an amount of titanium dioxide that will form a continuity in the thin film structure. The thin film can be porous and contain at least one metal selected from cobalt, nickel, tungsten, copper, platinum, gold, silver and iron. Additionally, significantly larger titanium dioxide particles of 0.02 ?m in diameter can be further mixed into the thin film.
    Type: Grant
    Filed: February 26, 2008
    Date of Patent: December 20, 2011
    Assignees: Horiba, Ltd., Mie University
    Inventors: Yuji Nishio, Yasukazu Iwamoto, Tadanori Hashimoto
  • Patent number: 7976690
    Abstract: Disclosed is a sensitive glass film for a pH electrode, which is not deteriorated in its glass strength or pH-measuring function, which is hardly stained, and from which any stain can be removed easily. Also disclosed is a pH electrode having the sensitive glass film. A microparticle comprising rutile-type or brookite-type titanium dioxide or a microparticle comprising amorphous titanium dioxide is adhered directly on the glass film surface of a sensitive glass film for a pH electrode.
    Type: Grant
    Filed: December 11, 2007
    Date of Patent: July 12, 2011
    Assignees: HORIBA, Ltd., Mie University
    Inventors: Yuji Nishio, Yasukazu Iwamoto, Tadanori Hashimoto
  • Publication number: 20100259271
    Abstract: Disclosed are a measurement method and a measurement apparatus both of which can measure the content of water or an organic acid in a polar organic solvent with high accuracy even when water or the organic acid is contained in the polar organic solvent at a low content. The content of water or an organic acid in a polar organic solvent can be measured by using, as a work electrode, an ISFET electrode in which a thin film comprising an oxide or nitride of a metal or metalloid element belonging to Groups 3 to 15 is formed on a gate.
    Type: Application
    Filed: December 26, 2008
    Publication date: October 14, 2010
    Inventors: Yuji Nishio, Yasukazu Iwamoto
  • Publication number: 20100252431
    Abstract: Disclosed is an ion-selective electrode having excellent mechanical strength, excellent durability, low membrane resistance and good ion response accuracy. This ion-selective electrode comprises a response glass membrane which has ion selectivity and is made of an oxynitride glass containing Li.
    Type: Application
    Filed: December 17, 2008
    Publication date: October 7, 2010
    Inventors: Yuji Nishio, Yasukazu Iwamoto
  • Publication number: 20100179046
    Abstract: Disclosed is a sensitive glass for use in a pH-sensitive glass electrode, which comprises at least Me2O3 (Me represents a lanthanoid) and further comprises Y2O3 or Sc2O3 in an amount smaller than that of the Me2O3. Also disclosed is a sensitive glass for use in a cation-sensitive glass electrode, which comprises at least Y2O3 or Sc2O3.
    Type: Application
    Filed: September 6, 2007
    Publication date: July 15, 2010
    Applicant: HORIBA, LTD.
    Inventors: Yasukazu Iwamoto, Yuji Nishio