公开(公告)号：JPH06109696A

公开(公告)日：1994-04-22

申请号：JP28530792

申请日：1992-09-30

Applicant: TOA ELECTRONICS ,  TOTO LTD

Inventor： KATO AKIHIKO ,  YAMASATO MASAHARU ,  YANAGIDA YOSHINORI ,  MATSUNO TAKANORI ,  OTANI TAKAYUKI

IPC: G01N27/26 ,  C02F1/46 ,  G01N27/40 ,  G01N27/416

Abstract: PURPOSE:To obtain a method and device for easily measuring the pH of electrolytic acid water at a manufacturing site or a usage site such as a hospital and a house. CONSTITUTION:Two pH sensitive electrodes 3 and 4 are laid out at a channel 2 inside a flow cell 1, the pH sensitive electrodes 3 and 4 are calibrated with tap water supplied to the channel 2 as a calibration liquid, and then electrolytic acid water is supplied to only the pH sensitive electrode 4 while the pH sensitive electrode 3 is allowed to contact the tap water. While the tap water and the electrolytic acid water are liquid-joined in the channel, the pH of the electrolytic acid water is measured according to the difference in the potential between two pH sensitive electrodes 3 and 4.

公开(公告)号：JPH0523360A

公开(公告)日：1993-02-02

申请号：JP23387691

申请日：1991-08-21

Applicant: TOA ELECTRONICS

Inventor： KATO AKIHIKO ,  ITO YOSHIHARU ,  YANAGIDA YOSHINORI ,  YAMASATO MASAHARU ,  KATSUBE TERUAKI

IPC: A61B5/00 ,  A61B5/0408 ,  A61B5/0478 ,  A61B5/0492 ,  A61B10/00 ,  A61C19/04 ,  G01N27/30

Abstract: PURPOSE:To obtain an electrode for pH measurement which is fast, gives good response with high speed over a wide pH range, makes a stable measurement for a long period possible and can be constituted into an extremely fine shape so as to be suitable for dental examination. CONSTITUTION:The title electrode is an electrode for pH measurement wherein a supporting body 3 wherein an insulating film 2 is provided on the surface of an electrically conductive base material 1, an iridium oxide responding film 4 provided by electrically connecting it with the inner electrically conductive base material 1 on the side face or the apex face of one side of the supporting body 3 and a porous protective film 5 covering the iridium oxide responding film 4 and formed on the supporting body 3 are provided and the iridium oxide responding film 4 consists of iridium oxide with a ratio of oxygen to iridium of 2.5-3.5.

公开(公告)号：JPH0518929A

公开(公告)日：1993-01-26

申请号：JP23387591

申请日：1991-08-21

Applicant: TOA ELECTRONICS

Inventor： KATO AKIHIKO ,  YANAGIDA YOSHINORI ,  YAMASATO MASAHARU ,  KATSUBE TERUAKI

IPC: A61B5/145 ,  A61B5/1468 ,  G01N27/30

Abstract: PURPOSE:To obtain an electrode for measuring pH and its measuring method which enables the entire electrode to be formed finely, is rigid and at the same time superb in chemical resistance, achieves an improved response over a wide pH range and a stable measurement for a long period of time. CONSTITUTION:An electrode for measuring pH is provided with a conductive support 1 and an iridium oxide sensitive film 3 which is formed on a surface of the conductive support 1 and preferably is provided with the conductive support 1, an insulation film 2 which is provided at one portion of the conductive support 1, and the iridium oxide sensitive film 3 which is formed while it is in contact with the conductive support 1 at a portion without any insulation film 2. The iridium oxide sensitive film 3 consists of an iridium oxide where a ratio of oxygen to iridium is 2.5-3.5.

公开(公告)号：JPH06160331A

公开(公告)日：1994-06-07

申请号：JP33357992

申请日：1992-11-19

Applicant: TOA ELECTRONICS

Inventor： YANAGIDA YOSHINORI ,  SAKURAI HISASHI ,  TAKAYAMA MASAHARU

IPC: G01N27/28 ,  G01N27/36

Abstract: PURPOSE:To furnish a flow-through type pH electrode which can be used very effectively in a measuring system of which a pH measuring range is 0 to 14, as well. CONSTITUTION:A pipe 20 for introducing a liquid to be inspected is disposed inside a tubular member 4 having a spherical pH-sensitive glass film 8 formed in the upper end. The liquid to be inspected is introduced by the pipe 20 and made to strike against the spherical pH-sensitive glass film 8. This liquid passes through a circular passage 24 formed between the tubular member 4 and the pipe 20 and is discharged from a discharge port 18.

公开(公告)号：JPH05332983A

公开(公告)日：1993-12-17

申请号：JP16433792

申请日：1992-05-29

Applicant: TOA ELECTRONICS

Inventor： YAMASATO MASAHARU ,  YANAGIDA YOSHINORI ,  KATO AKIHIKO ,  KONNO HIROKO

IPC: G01N27/30 ,  G01N27/403

Abstract: PURPOSE:To make it possible to measure ion activity on the surface of an object to be measured and the inside thereof by means of one composite electrode for measuring ion active amount. CONSTITUTION:A needle-like ion activity sensing electrode 1 that is provided with an ion active sensing membrane on its tip surface is fixed on a metallic tubular body 5 with an insulation tubular body 4 interposed. The body 5 is arranged inside an inner tubular body 11 of an insulation cover 10 with double- ply construction where the inner tubular body 11 and outer tubular body 12 are provided and a groove 14 is formed in an axial direction as to penetrate the side face, in such a way that the body 5 will be able to slide in an axial direction, being closely contact with the inner surface of the body 11. On the other hand, a liquid junction pad 16 of comparing electrode is fitted in a doughnut-like front end opening between the body 11 of the cover 10 and the body 12, and an inner electrolyte 17 and an inner electrode 18 of the comparing electrode are arranged in an inner space. Further, the sliding position is set in such a way that the surface of the junction 16 will be on the same plane of the surface of the electrode 1 when the electrode is drawn back to the utmost.

公开(公告)号：JPH05203616A

公开(公告)日：1993-08-10

申请号：JP3867592

申请日：1992-01-29

Applicant: TOA ELECTRONICS

Inventor： KATO AKIHIKO ,  YAMASATO MASAHARU ,  YANAGIDA YOSHINORI ,  KONNO HIROKO

IPC: G01N27/26 ,  G01N27/30 ,  G01N27/416

Abstract: PURPOSE:To stabilize an electrode potential of a pH electrode using metal or metal oxide for pH-sensitive film easily in a short time, and facilitate calibra tion operation. CONSTITUTION:After completion of measurement, pH electrode 30 and a comparison electrode 10 are contained in an adaptor 1 attached to a device main body, and electrodes 30, 10 are immersed in solution 15 of pH6.86, which is similar to that of inner liquid 13 of the comparison electrode 10, injected inside it. Electrode plugs of the electrodes 30, 10 are connected to a pH terminal 2 and a comparison terminal 3, and a switch 4 is put on, so the pH electrode 30 and the comparison electrode 10 are shortcircuitted. An electrode potential of the pH electrode 30 is thus returned to its original condition soon to be stabilized. In the meanwhile, the pH terminal of the device main body is shortcircuitted with the comparison terminal, and a gauge pointing value is set at pH6.86. Calibration for one point can thus be performed electrically, thereby need of complicated calibration operation can be eliminated.