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1. 发明专利

JPH08220050A ELECTROLYTE ANALYZER 失效
公开(公告)号：JPH08220050A
公开(公告)日：1996-08-30
申请号：JP2010895
申请日：1995-02-08
申请人： HITACHI LTD
发明人： YOSHIOKA NORIKO , OKI NAOTO
IPC分类号： G01N27/26
摘要： PURPOSE: To use one kind of sample as a high- and lowconcentration solutions for plotting calibration curve and an internal standard solution so as to easily change the concentration ranges of the solutions for plotting calibration curve and the internal standard solution by changing the rate of dilution of the internal standard solution. CONSTITUTION: An internal standard solution used as a reagent is used as a low-concentration solution for plotting calibration curve and a solution obtained by diluting the internal standard solution at a rate of dilution of 1.5-3.0 is used as a low-concentration curve for plotting calibration curve. Therefore, only three kinds of solutions of the internal standard solution, diluted internal standard solution, and comparison electrode solution are required. Namely, a calibration curve is plotted by automatically setting the concentration of the low- concentration solution by inputting the rate of dilution of the internal standard solution on the screen of a CRT. Then, by alternately measuring the diluted sample of a specimen and internal standard solution, the concentration of the specimen is calculated from the slope sensitivity and the potential difference between the internal standard solution and specimen. Therefore, no special reagent is required for plotting calibration curve and automatic calibration can be performed. In addition, the concentration range of calibration curves and the concentration of the internal standard solution can be easily changed.

2. 发明专利

JP2000028568A SOLID FILM TYPE ION SELECTIVELY SENSITIVE FILM AND ELECTRODE USING THE SAME 失效
公开(公告)号：JP2000028568A
公开(公告)日：2000-01-28
申请号：JP19835898
申请日：1998-07-14
申请人： HITACHI LTD
发明人： OZAWA OSAMU , MIYAHARA YUJI , NINOMIYA TAKESHI , YAMASHITA KOTARO , YOSHIOKA NORIKO , SHIBATA YASUHISA
IPC分类号： G01N27/333
摘要： PROBLEM TO BE SOLVED: To provide a long period stable electrode having a high reliability and inhibiting a moisture movement by providing a moisture transmittance inhibiting member which is adjacent to a sensitive film. SOLUTION: An internal fluid 2 and an internal electrode 3 are accommodated in an electrode tube 1 and an ion sensitive film 4 is formed on an edge portion of a tubular electrode body 1. Then, a moisture transmittance inhibiting member 5 is provided between the ion sensitive film 4 and the internal fluid 2. A member obtained by integrally forming the ion sensitive film 4 and the moisture transmittance inhibiting member is punched to an appropriate size corresponding to a size of the electrode tube 1 and is adhered to an edge portion of the electrode tube 1. As the ion sensitive film 4, a polymer immobilized film type ion sensitive film containing a polymer to which a legand is immobilized can be preferably used. Then, as the moisture transmittance inhibiting member 5 various materials having characteristics a low moisture transmittance and a sufficient high ion transmittance can be used.

3. 发明专利

JP2000129010A CHLORIDE-ION-SENSITIVE FILM, ITS PRODUCTION, AND CHLORIDE ION SENSOR 失效
公开(公告)号：JP2000129010A
公开(公告)日：2000-05-09
申请号：JP30065098
申请日：1998-10-22
申请人： HITACHI LTD
发明人： YAMASHITA KOTARO , YOSHIOKA NORIKO , SHIBATA YASUHISA , OZAWA OSAMU
IPC分类号： C08J5/22 , C08F212/08 , C08F212/14 , C08F212/36 , G01N27/333 , G01N27/416
摘要： PROBLEM TO BE SOLVED: To provide a process for producing an ion exchange resin membrane amenable to the control of the ratio of ion exchange groups and to provide a chloride ion sensor. SOLUTION: There is provided a process for producing a chloride-ion-sensitive membrane, comprising a first step of reacting chloromethylstyrene with a tert. amine and forming a polymer comprising chloromethylstyrene combined with the tert. amine, styrene, and divinylbenzene. The thus obtained chloride-ion- sensitive membrane or chloride-ion sensor has a reduced dispersion of selectivity and a high reliability.

4. 发明专利

JPH11264810A CHLORIDE ION SENSOR AND MANUFACTURE OF CHLORIDE ION-SENSITIVE MEMBRANE 失效
公开(公告)号：JPH11264810A
公开(公告)日：1999-09-28
申请号：JP6977298
申请日：1998-03-19
申请人： HITACHI LTD
发明人： YOSHIOKA NORIKO , SHIBATA YASUHISA , OZAWA OSAMU , YAMASHITA KOTARO
IPC分类号： G01N27/333 , G01N27/416
摘要： PROBLEM TO BE SOLVED: To obtain a chloride ion sensor whose high selectivity and high stability are retained, by a method wherein an ion-exchange resin is treated with a methaphenilenediamine solution and with a formaldehyde-alkali mixed solution. SOLUTION: An anion-exchange resin membrane is immersed in a solution in which methaphenilenediamine is dissolved by a proper solvent. Then, the anion-exchange resin membrane is immersed in a formaldehyde-alkali mixed solution. Thereby, a methaphenilenediamine-formaldehyde condensation product is formed on, and fixed to, the surface of the anion-exchange resin membrane. When it is used as a chloride ion-sensitive membrane, a chloride ion sensor which is selectively sensitive to chloride ions can be tained. A water-soluble solvent whose polarity is high can be used as a solvent for methaphenylenediamine, and methanol is most suitable out of ethanol, propanol, methanol and the like. As a result, chloride ions can be quantitatively determined extremely precisely even in a humor such as blood, urine or the like in which various disturbing ions exist.

5. 发明专利

JPH0933520A REAGENT AND METHOD FOR MEASURING ELECTROLYTE FOR ELECTRODE 失效
公开(公告)号：JPH0933520A
公开(公告)日：1997-02-07
申请号：JP18880495
申请日：1995-07-25
申请人： HITACHI LTD
发明人： YOSHIOKA NORIKO , SUGAWARA KENJI
IPC分类号： G01N33/49 , G01N27/416
摘要： PROBLEM TO BE SOLVED: To enhance accuracy in the measurement of electrolyte by adding bivalent cations, contained in an organism less than lower limit of measurement, in the form of a salt composed of hydrophilic anions having no effect on the anions to be measured thereby suppressing the effect of ion exchange of anticoagulant, i.e., heparin lithium, in a blood sampling tube. SOLUTION: Bivalent cations contained in an organism less than lower limit of measurement and having no relation with cations to be measured are added, in the form of a salt composed of hydrophilic anions having no effect on the anions to be measured, to a liquid for diluting a sample. Consequently, accuracy can be enhanced in the measurement of electrolyte in a small quantity of blood sampled by means of a blood sampling tube and mixed with an anticoagulant (heparin lithium) being employed in emergency inspection. Furthermore, when copper ions are added into the dilution liquid, proliferation of various germs can be suppressed in the reagent and the accuracy is enhanced in the measurement of electrolyte.

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