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11. 发明专利

JP2001021546A ANALYTICAL METHOD OF AMMONIA NITROGEN AND NITRATE/ NITRITE NITROGEN AND TOTAL NITROGEN 失效
公开(公告)号：JP2001021546A
公开(公告)日：2001-01-26
申请号：JP18964899
申请日：1999-07-02
申请人： HORIBA LTD
发明人： UCHIMURA KOJI , YAMADA TOSHINORI
IPC分类号： G01N31/00 , G01N21/76 , G01N31/10 , G01N31/12
摘要： PROBLEM TO BE SOLVED: To provide an analytical method of ammonia nitrogen and nitrate/ nitrite nitrogen capable of quantitatively determining accurately NOx nitrogen and ammonia nitrogen separately. SOLUTION: This method includes a process in which an alkalizing agent is added to a sample water to thereby convert ammonia nitrogen in the sample water into ammonia gas, and the ammonia gas is oxidized into NO gas by an oxidation catalyst installed in a combustion part of a heated reaction tube, and the NO gas is sent to a chemiluminescent NO detector 13 to analyze ammoniacal nitrogen, and a process in which NOx nitrogen comprising nitrate nitrogen and nitrite nitrogen included in the sample water from which ammonia nitrogen is removed is converted into ammonia gas by reduction reaction by using a Devarda's alloy, and the ammonta gas is oxidized into NO gas by the oxidation catalyst installed on the combustion part of the heated reaction tube, and the NO gas is sent to the detector 13 to analyze the NOx nitrogen.

12. 发明专利

JP2000275233A ANALYZING METHOD FOR MORPHOLOGICAL NITROGEN AND TOTAL NITROGEN 失效
公开(公告)号：JP2000275233A
公开(公告)日：2000-10-06
申请号：JP8303399
申请日：1999-03-26
申请人： HORIBA LTD
发明人： UCHIMURA KOJI
IPC分类号： G01N31/00 , G01N31/12 , G01N33/18
摘要： PROBLEM TO BE SOLVED: To accurately quantify the ion morphological nitrogen without being affected by CL-, Br- and K+ possibly obstructing the quantification of NO2-, NO3- and NH4+, respectively. SOLUTION: This analyzing method includes a total nitrogen analyzing process that sample water is oxidized into NO gas by an oxidation catalyst 11 provided on the combustion section 10 of a heated reaction tube 9 and the NO gas is sent to a chemiluminescence NO detector 7 to analyze the total nitrogen in the sample water and a monophological nitrogen analyzing process that at least one of the nitrous acid morphological nitrogen, nitric acid morphological nitrogen and ammonia morphological nitrogen in the sample water is separated, a drain channel B2 is switched to a water collection channel S each time it is separated, the sample water containing only the separated morphological nitrogen is fed to the combustion section 10 from the water collection channel S, it is oxidized into NO gas by the oxidation catalyst 11, and the NO gas is sent to the chemiluminescence NO detector 7.

13. 发明专利

JPH1164268A POLAROGRAPHIC GAS SENSOR 失效
公开(公告)号：JPH1164268A
公开(公告)日：1999-03-05
申请号：JP23336897
申请日：1997-08-13
申请人： HORIBA LTD
发明人： UCHIMURA KOJI , AKIYAMA SHIGEYUKI
IPC分类号： G01N27/26 , G01N27/404 , G01N27/416 , G01N27/48
摘要： PROBLEM TO BE SOLVED: To provide a polarographic gas sensor which can simply and surely detect a sensitivity deterioration without using a calibration sample, etc., and without interrupting a measurement for a long time. SOLUTION: In this gas sensor, a chamber 4 sectioned from outside by a diaphragm 3 which passes only a gas to be measured is formed at one end of a sensor body 1. An electrolyte 5 is filled in the chamber 4. An operating electrode 6 and an opposite electrode 7 are arranged in the electrolyte 5. A voltage is applied between the operating electrode 6 and the opposite electrode 7. A current running between the electrodes 6 and 7 through an electrolysis of the gas to be measured which passes the diaphragm 3 is measured. In this case, a sensor output in a fixed time is measured after the voltage to be applied between the operating electrode 6 and the opposite electrode 7 is changed. The sensor output is compared with a sensor output before the voltage is changed. The presence/absence of a sensitivity deterioration is detected on the basis of a degree of the change.

14. 发明专利

JP2000298126A WATER QUALITY ANALYZER 失效
公开(公告)号：JP2000298126A
公开(公告)日：2000-10-24
申请号：JP10581899
申请日：1999-04-13
申请人： HORIBA LTD
发明人： UCHIMURA KOJI , OTA TOSHIO , MINAMI TAKAAKI
IPC分类号： C02F1/00 , G01N1/00 , G01N1/10 , G01N21/76 , G01N31/00 , G01N31/10 , G01N33/18
摘要： PROBLEM TO BE SOLVED: To reduce warming-up and cooling times required in a sample vaporizing/oxidizing device, delay degradation of an oxidation catalyst by not leaving the oxidation catalyst under a high temperature, and supply all vaporized sample to an analyzer. SOLUTION: This water quality analyzer is provided with a vaporizing pipe 1 made of an electrical conductive material having a small specific heat, in the upstream of a fluid passage an oxidation catalyst 2 in the downstream thereof; and a heater 3 for heating the downstream including the oxidation catalyst 2. A liquid sample S is sent into the vaporizing pipe 1 heated by current-carrying for vaporization, the vaporized gas is sent to the downstream together with a carrier gas K for oxidization, then the oxidized gas is sent to a detector together with the carrier gas K to analyze components in the liquid sample S.

15. 发明专利

JP2000193583A LIQUID CELL FOR MAKING SAMPLE LIQUID FLAW 失效
公开(公告)号：JP2000193583A
公开(公告)日：2000-07-14
申请号：JP37062898
申请日：1998-12-25
申请人： HORIBA LTD
发明人： UCHIMURA KOJI , MATSUDA TADAYUKI
IPC分类号： G01N21/05 , G01N21/15
摘要： PROBLEM TO BE SOLVED: To enable a liquid cell to have the function of preventing light from being irregularly reflected from the cell interface and to enable the optical path length to be lengthend even in a small space, by molding a pipe material of light transmitting material into a spiral shape or a waveform shape and adding a material of high light reflectance to the outer surface of the pipe material. SOLUTION: In cell holders 1 and 2, screw holes 3 and 4 open at different surface parts and flow channels 5 of a sample liquid are concentrically formed. The cell holders 1 and 2 are arranged on a base 7 via brackets 6 and 6 in such a way to bring the axes of the channels 5 and 5 into a concentric state. Then, an inflow channel 8 of a sample liquid connected to the channel 5 is formed in the one cell holder 1, and an outflow channel 9 of a sample liquid branched from the channel 5 is formed in the other cell holder 2. A pipe material 21 of light transmitting material is molded in a spiral shape or a waveform shape, and material 22 of high light reflectance is added to the outer surface of the pipe material 21 to constitute the liquid cell 19 for making a sample liquid flow.

16. 发明专利

JPH0882591A MEASURING CELL OF ABSORPTIOMETER 失效
公开(公告)号：JPH0882591A
公开(公告)日：1996-03-26
申请号：JP24231494
申请日：1994-09-10
申请人： HORIBA LTD
发明人： YONEZAWA HIYOUSUKE , UCHIMURA KOJI , TSUTSUI TATSUHIDE
IPC分类号： G01N21/03 , G01N21/59
摘要： PURPOSE: To provide the measuring cell of an absorptiometer ensuring necessary cell length though cell capacity is small and easy to perform the stirring of a liquid such as a liquid to be inspected, the smooth discharge of the liquid to be inspected and internal washing. CONSTITUTION: The measuring cell of an absorptiometer has a cell space 5 receiving a liquid to be inspected formed therein and also has the cell window 10 corresponding to a light source 13 and the cell window 11 corresponding to a photodetector 15 arranged to the side part thereof in opposed relationship and has a stirrer 18 provided to the bottom surface part thereof. The plane view shape of the cell space 5 is set to a middle expanded shape mutually different in length in a left and right directions and the direction crossing the same at a right angle and symmetric in both directions and the longer direction of the cell space is allowed to coincide with the light path connecting the light source 13 and the photodetector 15.

17. 发明专利

JPH0882580A REAGENT INJECTION DEVICE AND METHOD 失效
公开(公告)号：JPH0882580A
公开(公告)日：1996-03-26
申请号：JP24231194
申请日：1994-09-10
申请人： HORIBA LTD
发明人： UCHIMURA KOJI , YONEZAWA HIYOUSUKE , YAMAUCHI SUSUMU
IPC分类号： G01N1/00 , G01N21/17 , G01N21/59 , G01N35/10
摘要： PURPOSE: To certainly prevent a reagent from remaining at the tip of a reagent injection nozzle and to inject the reagent with high quantitative injection characteristics. CONSTITUTION: A reagent injection method is constituted so as to inject a reagent into a measuring cell 3 by the diaphragm pump 7 provided to the reagent supply pipe 4 connecting a reagent supply part 1 to the reagent injection nozzle 2 provided so as to face to the measuring cell 3 through a passage changeover part 5. The operation for cutting off the diaphragm pump 7 due to the passage changeover part 5 and the reagent injection nozzle 2 is slightly delayed from a point of time when the diaphragm 9 in the diaphragm pump 7 arrives at an upper dead point to fall.

18. 发明专利

JPH07284608A CELL OF OIL-COMPONENT CONCENTRATION MEASURING INSTRUMENT 失效
公开(公告)号：JPH07284608A
公开(公告)日：1995-10-31
申请号：JP10181994
申请日：1994-04-16
申请人： HORIBA LTD
发明人： SHINOHARA MASAYOSHI , KAWAMOTO TAKASHI , FUJII HIROSHI , UCHIMURA KOJI
IPC分类号： G01N21/03 , B01D17/12
摘要： PURPOSE:To obtain an oil-component concn. measuring instrument which suppresses scattering of IR rays and has good reproducibility by inclining the inside walls of a cell body so as to make these walls broader from an aperture on a light source side toward an aperture on a detector side. CONSTITUTION:This oil-component concn. measuring instrument has the cell body 2 into which a sample S is injected via an injection port 43, an IR transmission window 34 of the light source side aperture 3 of the cell body 2, the IR transmission window 36 on the detector side and a port 42 open to the atm. The inside walls 2a of the cell body 2 are formed to an inclined structure in such a manner that the inside walls 2a are broadened from the aperture 3 on the light source side toward the aperture 4 on the detector side. Namely, only the light source side of the inside walls 2a is provided with a slope (g) of theta=15 deg. and further, the aperture 3 of the IR transmission window 34 is formed narrower than the aperture 4 of the IR transmission window 36. The incident IR rays are hardly scattered and only the IR rays which are nearly parallel light beams are sent to the detector if the cell is constituted in such a manner. Similarly, the air bubbles are made easier to move by the inclination and the disturbance by the air bubbles is prevented.

19. 发明专利

JP2002296175A CELL FOR FLUID ANALYSIS AND ANALYZER USING IT 审中-公开
公开(公告)号：JP2002296175A
公开(公告)日：2002-10-09
申请号：JP2001295441
申请日：2001-09-27
申请人： KOSU KK , HORIBA LTD
发明人： UCHIMURA KOJI
IPC分类号： G01N35/08 , G01N21/05 , G01N21/59 , G02B6/032
摘要： PROBLEM TO BE SOLVED: To provide a cell for fluid analysis which raises the degree of freedom of cell arrangement, can be arranged in a small space, can obtain an optical path length of sufficient length with a small amount of sample, does not necessitate a large scale light shielding mechanism and many additional constituent parts, and can easily change the optical path length, and an analyzer using this cell. SOLUTION: The cell for fluid analysis C is constituted a sample S to flow in its inner part and an illuminating light to transmit through the sample S. The cell has an inner tube 9 through the inside of which the sample S passes, a protecting tube 10 which is formed outside this inner tube 9 and holds the shape of the inner tube 9, and a reflection layer 11 which is formed between the inner tube 9 and the protecting tube 10 and reflects light passed through the inside of the inner tube 9.

20. 发明专利

JP2001165895A MEASURING METHOD AND MEASURING APPARATUS FOR NITROGEN COMPOUND ION 失效
公开(公告)号：JP2001165895A
公开(公告)日：2001-06-22
申请号：JP35168899
申请日：1999-12-10
申请人： HORIBA LTD
发明人： IWAMOTO YOSHIKAZU , UCHIMURA KOJI
IPC分类号： G01N31/00 , G01N27/28 , G01N27/404 , G01N27/416
摘要： PROBLEM TO BE SOLVED: To provide a method and a device for easily and accurately measuring nitrogen compound ions such as ammonium ions, nitric acid ions, and nitrous acid ions contained in the water serving as an index of water pollution. SOLUTION: A sample liquid S is brought into contact with a nitrogen compound ion reduction metal or alloy 3 under the presence of an alkali solution 5, so that the nitrogen compound ions are changed into ammonia. The concentration of the ammonia is measured by an ammonia sensor 6 of gas transmission film type.

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