公开(公告)号：JPH021542A

公开(公告)日：1990-01-05

申请号：JP1347589

申请日：1989-01-23

Applicant: TOA ELECTRONICS ,  JUJO PAPER CO LTD

Inventor： HATA KENJIRO ,  YOKOYAMA ICHIRO ,  KANEZAKI SEIICHI ,  NISHIYAMA FUMIO

IPC: G01N27/416

Abstract: PURPOSE:To easily and rapidly measure the concn. of formaldehyde by supplying a specified volume of a diluting liquid to a cell under impression of a voltage to an anode, then supplying a specified volume of a liquid to be inspected to the cell and measuring the current by the anodic oxidation of the formaldehyde. CONSTITUTION:The anode consisting of platinum and a cathode 2 consisting of silver which is larger in the area in contact with the liquid than the anode are inserted and disposed into the measuring cell 6. The specified volume of the diluting liquid 7 is supplied to the cell 6 while the specified voltage of +7 to +1.0V with respect to the cathode 2 is impressed to the anode 1. The specified volume of the liquid to be inspected is then supplied to the cell 6 and the current by the anodic oxidation of the formaldehyde is measured. The area ratio of the anode 1: the cathode 2 is

公开(公告)号：JPS63132170A

公开(公告)日：1988-06-04

申请号：JP27649486

申请日：1986-11-21

Applicant: TOA ELECTRONICS

Inventor： SUZUKI HIROSHI ,  TAKAYAMA HISASHI ,  SUZUKI HIROYUKI ,  YOKOYAMA ICHIRO

IPC: G01N1/00 ,  G01N35/10

Abstract: PURPOSE:To entirely remove the sample liquid remaining in a sample transport pipeline so that the trace sample is analyzed with high accuracy by feeding air as air bubbles at >=1 points into said pipeline from an air transport pipe to execute co-cleaning, then drawing part of the feed side sample into the air transport pipe side after the final air bubble is fed into the pipeline. CONSTITUTION:The sample liquid entering the pipeline 2 from a sample pot 1 is sucked by a pump 4 and is introduced into a flow cell 3 for measurement from which the sample liquid is discharged through a discharge port 5. A part of a standard liquid is passed to the pipeline 2 and the cell 3 to co-clean the same prior to the measurement or at the time of calibration. A small amt. of the air is intermittently fed into the pipeline 2 from a branch pipe 6 through a released pinch valve 8 and is introduced as the air bubbles into the flow of the sample in the pipeline 2 from >=1 points to remove the remaining previous measuring liquid, etc. The sample liquid or the standard liquid for calibration is fed from the sample pot 1 into the pipeline 2 and the feed of the air is stopped right after the final air bubble is fed into said pipeline upon ending of the co-cleaning.

公开(公告)号：JPH07218438A

公开(公告)日：1995-08-18

申请号：JP1012494

申请日：1994-01-31

Applicant: TOA ELECTRONICS ,  KYOWA MEDEX CO LTD ,  TOYO BOSEKI

Inventor： TADANO TOSHIO ,  SUZUKI NORIYUKI ,  TANEBE MASARU ,  HANIYU TSUNEO ,  SAKURAI HISASHI ,  YOKOYAMA ICHIRO ,  MORITA TOSHINAO

IPC: G01N33/543 ,  G01N21/27 ,  G01N21/76

Abstract: PURPOSE:To determine an object to be measured with high sensitivity by providing an integreting sphere to a detector and arranging a liquid opaque material body having an opening for limiting a reagent applying extent on a porous film. CONSTITUTION:A photometric device S constituted in such a way that a part 3 to be tested is irradiated with light from a light source counterposed to the opening 21 of an integrating sphere and reflected light from the part 3 is introduced to the sphere 2, and then, the reflected light is detected by means of a detector 4 provided on the side face of the sphere 2 is used. Since the reflected light from the part 3 is converged to the detector 4, the quantity of detected light becomes larger and the degree of coloring can be sufficiently recognized, resulting in high-sensitivity measurement. It is preferable to constitute the sphere 2 in such a way that the internal surface is coated with a material having a high reflection efficiency and the opening 21 can be brought nearer to the part 3 as much as possible, and then, the sphere 2 can have such a diameter that does not allow other part than the part 3 to enter the opening 21. In addition a liquid opaque material body having a reagent introducing opening is arranged so as to improve the effectiveness of the device S.

公开(公告)号：JPH05126780A

公开(公告)日：1993-05-21

申请号：JP31173991

申请日：1991-10-30

Applicant: TOA ELECTRONICS

Inventor： TAKAYAMA HISASHI ,  YOKOYAMA ICHIRO ,  NAKANO TAISUKE ,  UEDA TATSU

IPC: G01N27/26

Abstract: PURPOSE:To obtain a measuring method of solution concentration which enables a very quick measurement without losing accuracy of the measurement. CONSTITUTION:In a measuring method of solution concentration where the solution concentration is calculated from output voltage of sample solution using a measuring device of solution concentration by ion electrode method, measurements of sample solutions 2 or 4 are repeated succedingly to the first calibration by calibration liquid. One single output voltage C1 obtained from the calibration is used for solution concentration calculation of output voltages S1 and S2 of each sample 1 or 2 before and/or after the calibration.