JP2008215926A - Electrolyte measuring instrument and biochemical autoanalyzer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electrolyte measuring instrument having a stable capacity by suppressing the growth of microorganisms such as bacteria or the like in a diluting liquid and a standard liquid. <P>SOLUTION: The electrolyte measuring instrument is equipped with an ion selective electrode for detecting the concentration of ions in a specimen liquid, the standard liquid and the diluting liquid supplied to the ion selective electrode to be used in the measurement of potential, a standard liquid housing container for housing the standard liquid and a diluting liquid housing container for housing the diluting liquid and has the photocatalyst provided in the standard liquid housing container and/or the diluting liquid housing container and a light irradiation means for mainly irradiating the photocatalyst with ultraviolet rays with a wavelength of 360-400 nm. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an electrolyte measuring device used for analyzing ions in a biological fluid, and a biochemical automatic analyzer.

  The ion-selective electrode has the feature of selectively quantifying the concentration of specific ions in the liquid, and has been used in a wide range of fields such as monitoring of specific ions and water quality analysis.

  This is because the potential E indicated by the ion selective electrode and the logarithm of the concentration of the target specific ion have a linear relationship, and the target ion concentration can be easily calculated from the measured potential.

  In recent years, such ion-selective electrodes have come to be used for medical purposes, particularly for quantification of various ions such as Na ions, K ions, and Cl ions present in blood. Many types of analyzers using ion selective electrodes have also been manufactured.

  Measurement methods using an ion selective electrode include a dilution method in which a sample solution is diluted with a diluent, and a non-dilution method in which the sample solution is measured without dilution. The dilution method is used in the electrolyte measuring devices installed in most automatic analyzers except for small emergency testing devices.

  In the diluting method, the diluting liquid is generally set in the analyzer and remains set in the apparatus until the diluting liquid runs out and is replaced.

  Once the diluent container is opened, the external atmosphere will come into contact with the liquid dilution, and the tubes and nozzles that dispense the diluent will also come into contact with the diluent. Microorganisms such as bacteria may enter the dilution liquid through the tube or nozzle, and as a result, the dilution liquid may be contaminated with microorganisms such as bacteria.

  If there is a reagent that is installed in the apparatus for a long period of time and used for measurement, other than the diluted solution, contamination by microorganisms such as bacteria may occur.

  In the electrolyte measuring device, the ion-selective electrode, the reagent and the flow path of the sample liquid adhere to proteins and organic substances contained in the sample liquid, bacteria falling from the atmosphere, etc. Occurs.

  A method of removing contamination by washing the flow path with hypochlorous acid is common, but measures against contamination of microorganisms such as bacteria present in reagents such as diluted solutions and standard solutions are not always sufficient. Absent.

  In recent years, high attention has been drawn to the photocatalytic action by the fine particles of the optical semiconductor represented by titanium dioxide TiO2, particularly its strong oxidation catalytic action.

  That is, when a particulate material having photoconductivity such as titanium dioxide is irradiated with light having a band cap energy or more (in the case of titanium dioxide, light of 400 nm or less, that is, ultraviolet light), electrons in the valence band are photoexcited. Then, the electrons move to the conduction band, free electrons are generated in the conduction band, and positively charged particles (holes) are generated in the valence band.

  These holes and electrons move inside the semiconductor particles, recombine with time, and disappear.

  However, if there are air or water on the particle surface, or a compound or ion having a lower vacancy than those holes or electrons, those holes and electrons move to the compound or ion through the particle surface, As a result, the holes directly oxidize compounds and ions that come into contact with the particle surface, or generate hydroxyl radicals that are one of active oxygen.

  Moreover, the reduction reaction by electrons is mainly reduction of oxygen, and oxidative oxygen species to which electrons are added are generated.

  Thus, the photo-semiconductor fine particles form an oxidative active surface when irradiated with light, and act as a catalyst for decomposition of organic compounds, etc. (“Quarterly Chemical Review“ Catalyst Chemistry Related to Light ”No. 23, 1994”). (Non-Patent Document 1).

  Titanium dioxide is particularly high among the optical semiconductors in the oxidation catalytic action of such optical semiconductor fine particles. Titanium dioxide is also excellent in stability and safety.

  Various applications are already known in which the fine powder of titanium dioxide is supported on the surface of the substrate as a thin film to form a photocatalyst, and its high oxidizing power during ultraviolet irradiation is utilized for decomposing organic compounds and the like.

  For example, hollow glass beads coated with a photocatalyst made of a thin film of titanium dioxide are known as a decomposing agent for crude oil spilled on the sea.

  That is, the crude oil adhering to the glass bead surface is decomposed by the strong oxidation catalytic action of titanium dioxide activated by ultraviolet rays in sunlight.

  Recently, it has also been applied to the deodorization or deodorization of indoor air, sterilization (antibacterial), and decomposition of dirt such as cigarette dust and oil film, using ultraviolet light contained in natural light or fluorescent light. It activates the photocatalyst and decomposes odorous compounds such as mercabtan or organic matter such as tobacco crabs, or kills microorganisms such as bacteria, or suppresses their propagation by acid catalyzed reaction.

Quarterly Chemical Review “Catalyst Chemistry with Light” No. 23, 1994

  As described above, the ion-selective electrode response and the response of the ion-selective electrode due to adhesion of proteins and organic substances contained in the sample liquid, bacteria falling from the atmosphere, etc. to the ion-selective electrode and the flow path of the reagent and sample liquid And a decrease in sensitivity occurs.

  An object of the present invention is to provide an electrolyte measurement device having stable performance by coping with the above-described problems and suppressing microorganisms such as bacteria in a diluted solution and a standard solution.

  The present invention, an ion-selective electrode for detecting the ion concentration of a sample liquid, a standard solution and a diluted solution supplied to the ion-selective electrode and used for potential measurement, a standard solution storage container for storing the standard solution, In an electrolyte measuring apparatus including a diluent storage container for storing the diluent, a photocatalyst provided inside the standard solution storage container and / or the diluent storage container, and ultraviolet light having a wavelength of 360 to 400 nm are mainly used for the photocatalyst. It has the light irradiation means to irradiate, It is characterized by the above-mentioned.

  More specifically, the electrolyte measuring apparatus of the present invention will be described in more detail. Each of the containing containers containing a standard solution and a diluted solution has a titanium dioxide thin film functioning as a photocatalyst. The titanium dioxide thin film is activated by the ultraviolet rays irradiated from the window and performs antibacterial action.

  For this reason, the stable ion-selective electrode performance without the response fall of the ion-selective electrode considered to be the cause of microorganisms, such as bacteria, can be maintained for a long period of time.

  There is no decrease in the response of the ion selective electrode, which is considered to be caused by microorganisms such as bacteria in the standard solution and the diluted solution, and stable ion selective electrode performance can be maintained for a long time.

  The smaller the particle size of the photocatalyst, the higher the photocatalytic action due to the “quantum size effect” or the like.

  Therefore, it is generally formed as a transparent thin film having a thickness of 0.3 μm or less, preferably 0.2 μm or less, or as a thin film obtained by multilayering such a thin film by a method such as applying a colloid to the substrate surface and baking. Is preferred.

  Moreover, it can also form by methods, such as a physical vapor deposition method (PVD) and a chemical vapor deposition method (CVD).

  Hazardous substances that are decomposed or oxidized and removed by photocatalytic reactions are substances that have adverse effects on the human body and living environment, and substances that have such potential, such as various biological oxygen demand substances, air pollutants, etc. And various agrochemicals such as herbicides, herbicides, fungicides, insecticides and nematicides, and microorganisms such as bacteria, actinomycetes, fungi, algae and molds.

  Examples of the environmental pollutants include organic compounds such as organic halogen compounds, organic phosphorus compounds and other organic compounds, nitrogen compounds, sulfur compounds, cyanide compounds, and chromium compounds.

  Specific examples of the organic halogen compound include polychlorinated biphenyl, chlorofluorocarbon, trihalomethane, trichloroethylene, and tetrachloroethylene.

  Specific examples of organic substances other than organic halogen compounds and organic phosphorus compounds include hydrocarbons such as surfactants and oils, aldehydes, mercaptans, alcohols, amines, amino acids, proteins, and the like. .

  Specific examples of the nitrogen compound include ammonia and nitrogen oxide (NOX), and examples of the sulfur compound include sulfur oxide (SOX).

  Since the photocatalyst needs to be in contact with a diluting solution and a standard solution that give a catalytic action, it is installed in the diluting solution and standard solution container.

  Each time the reagent is consumed, a new reagent and the storage container are exchanged together. Therefore, when installed in the reagent storage container, it is necessary to transfer the photocatalyst to a reagent storage container that is newly replaced each time.

  Reagents such as diluted solution and standard solution are aspirated using a tube or pipetter. However, in the case of a tube system, using a tube with a photocatalyst fixed to the tip does not impair workability during installation and reagent replacement. .

  In the case of the pipetter method, a photocatalyst can be contained in the base material, or a product in which a film containing the photocatalyst is laminated on the surface of the base material can be held in the reagent container and used.

  Examples of the base material include ceramic, ceramic, metal, glass, plastic, wood, or a composite thereof.

  Any shape of the substrate may be used, and any simple shape such as a spherical object, a cylindrical object, a cylindrical object, a tile, a wall material, a floor material, etc. can be installed inside the reagent container. Something like that. The substrate surface may be porous or dense.

  A light-emitting diode that is an LED chip is capable of emitting ultraviolet rays, and can be specifically composed of a pn-junction gallium nitride (GaN) based optical semiconductor crystal.

  This pn-junction gallium nitride (GaN) based optical semiconductor crystal emits light (electromagnetic waves) having a wavelength of 360 to 400 nm, that is, ultraviolet rays. This light emitting diode is held inside or outside the diluent and standard solution container, and irradiates the photocatalyst with ultraviolet rays.

  Note that the electricity supplied to the light emitting diode can be supplied from a battery stored and held in the main body, or can be drawn from the lamp line.

  The type of the ultraviolet light source may be a rare gas discharge lamp, mercury discharge lamp, or ultraviolet light emitting fluorescent lamp using xenon or the like as a discharge medium, and is particularly limited as long as light with a short wavelength of 400 nm or less can be efficiently irradiated. Not.

  The ultraviolet light source is preferably disposed in all of the diluent and the standard solution storage container as necessary, but a plurality of ultraviolet light sources may be used at intervals as long as ultraviolet irradiation is possible.

  The light emitting diode is characterized in that a reflecting means is provided at the top of the other end side of the molded portion in which a light emitting diode chip that mainly emits ultraviolet rays is molded with one end side as a lead wire lead-out portion.

  The shape and size of the light-emitting diode are not particularly limited, and can also be applied to a configuration that needs to irradiate ultraviolet rays to the side of the light source.

  The reflection means may be in the form of a film, a plate, a tape, a paste, or the like as long as it is effective for reflecting light with an ultraviolet ray of 400 nm or less irradiated from a light source.

  The material is not particularly limited, but in the case of a metal film, it is preferable to use silver, aluminum, or platinum.

  The pn-junction light emitter of the light emitting diode may be a semiconductor crystal such as GaN, AlN, AlGaN, ZnS, MgS, or MgSe, and may be any one that emits light having a wavelength of 400 nm or less.

  It is preferable in terms of light emission efficiency and power consumption that the light emitting diode emits only light in the spectral range of a wavelength of 360 to 400 nm.

  However, since the light emitted from the light emitting diode generally has a spectral range of at least 50 nm, it is difficult to obtain a light emitting diode that emits only light having a wavelength of 360 to 400 nm.

  Therefore, if the light emitting diode to be used emits light that sufficiently contains ultraviolet rays having a wavelength of 360 to 400 nm, it can be used also for a light emitting diode that contains visible light having a wavelength of 400 nm or more. it can.

  The ultraviolet light source is installed in the diluent and standard solution container or outside the container.

  In addition to rare gas discharge lamps, mercury discharge lamps, ultraviolet light-emitting fluorescent lamps and LED chips using xenon as a discharge medium, in the case of automatic analyzers, the light source of a photometer used for colorimetric analysis can be used. .

  In this case, ultraviolet light from the light source is guided to the photocatalyst using an optical fiber or the like and irradiated.

Hereinafter, the present invention will be described with reference to examples.
(Example 1)
FIG. 1 is a configuration diagram of an electrolyte measuring apparatus according to an embodiment of the present invention.

  First, a predetermined amount of the serum 1 contained in the serum container is sent to the dilution tank 7 by the serum suction pump 2.

  Next, a predetermined amount of the diluted solution 3 contained in the diluted solution storage container is sent to the dilution tank 7 by the diluted solution suction pump 4. In the dilution tank 7, the serum 1 and the diluted solution 3 are agitated to prepare a solution to be measured in which the components in the serum are diluted.

  A predetermined amount of the standard solution 5 contained in the standard solution storage container is sent to the dilution tank 7 by the standard solution suction pump 6.

  The liquid to be measured is sent to the Cl ion selective electrode, the Na ion selective electrode, and the K ion selective electrode unit 8 by the sample suction pump 13, and the potential difference between each ion selective electrode and the reference electrode is amplified by the amplifier 9, The electric signal is sent to the calculation display mechanism 10 to perform a predetermined ion concentration measurement.

  The liquid to be measured is sent to the waste liquid tank 12 by the waste liquid pump 11 after the measurement is completed. A photocatalyst 14 and an LED chip 15 (light irradiation means) are provided in the container for the diluent 3 and the standard solution 5.

  The ultraviolet rays emitted from the LED chip 15 strike the photocatalyst 14 and activate it.

  The activated photocatalyst forms an active surface having an oxidizing power, and oxidizes and decomposes organic compounds that come into contact therewith, and kills or grows microorganisms such as bacteria that come into contact therewith. Inhibit.

  Therefore, reagent purification, sterilization (antibacterial), and the like can be performed by such a photocatalytic reaction.

Further, in the case of a plurality of LED chips, more ultraviolet rays are emitted, and more visible light having a color is emitted, so that the photocatalytic reaction ability of the photocatalyst is increased and the color is increased. The visible light emission capacity can be increased.
(Example 2)
FIG. 2 is a block diagram of an electrolyte measuring apparatus according to another embodiment of the present invention.

  First, a predetermined amount of the serum 1 contained in the serum container is sent to the dilution tank 7 by the serum suction pump 2. Next, a predetermined amount of the diluted solution 3 contained in the diluted solution storage container is sent to the dilution tank 7 by the diluted solution suction pump 4.

  In the dilution tank 7, the serum 1 and the diluted solution 3 are agitated to prepare a solution to be measured in which the components in the serum are diluted. A predetermined amount of the standard solution 5 contained in the standard solution storage container is sent to the dilution tank 7 by the standard solution suction pump 6.

  This liquid to be measured is sent to the Cl ion selective electrode, Na ion selective electrode and K ion selective electrode unit 8 by the sample suction pump 13, and the potential difference between each ion selective electrode and the reference electrode is amplified by the amplifier 9. Then, the electric signal is sent to the calculation display mechanism 10 to perform a predetermined ion concentration measurement.

  The liquid to be measured is sent to the waste liquid tank 12 after the measurement is completed. A photocatalyst 14 and an LED chip 15 are provided outside the container for the diluent 3 and the standard solution 5.

  The ultraviolet rays emitted from the LED chip 15 hit the photocatalyst and activate it.

  And since the activated photocatalyst forms an active surface with an oxidizing power, it oxidizes and decomposes organic compounds that come into contact with it, and kills microorganisms such as bacteria that come into contact with it or inhibits its growth. To do.

  Therefore, reagent purification, sterilization (antibacterial), and the like can be performed by such a photocatalytic reaction.

Further, in the case of a plurality of LED chips, more ultraviolet rays are emitted, and more visible light having a color is emitted, so that the photocatalytic reaction ability of the photocatalyst is increased and the color is increased. The visible light emission capacity can be increased.
(Example 3)
FIG. 3 is a block diagram of an electrolyte measuring device used in the method of the present invention mounted on an automatic analyzer.

  First, a predetermined amount of serum 1 containing a serum container is sent by a serum suction pump 2 to a dilution tank 7 containing a dilution tank container. Next, a predetermined amount of the diluted solution 3 is sent to the dilution tank 7 by the diluted solution suction pump 4.

  In the dilution tank 7, the serum 1 and the diluted solution 3 are agitated to prepare a solution to be measured in which the components in the serum are diluted. A predetermined amount of the standard solution 5 containing the standard solution storage container is sent to the dilution tank 7 by the standard solution suction pump 6.

  This liquid to be measured is sent to the Cl ion selective electrode, Na ion selective electrode and K ion selective electrode unit 8 by the sample suction pump 13, and the potential difference between each ion selective electrode and the reference electrode is amplified by the amplifier 9. The electrical signal is sent to the calculation display mechanism 10 to perform a predetermined ion concentration measurement.

  The liquid to be measured is sent to the waste liquid tank 12 after the measurement is completed. A photocatalyst 14 and a light emitter 16 are provided outside the container for the diluent 3 and the standard solution 5. The light emitter 16 is introduced from the light source in the colorimetric spectrophotometer of the automatic analyzer through the optical fiber 160 (light transmission member).

  The light source generates electromagnetic waves included in ultraviolet rays having a wavelength of 360 to 400 nm. The light emitter 16 is provided at the tip of the optical fiber 160 (light transmission member).

  The ultraviolet rays emitted from the light emitter 16 strike the photocatalyst and activate it.

  And since the activated photocatalyst forms an active surface with an oxidizing power, it oxidizes and decomposes organic compounds that come into contact with it, and kills microorganisms such as bacteria that come into contact with it or inhibits its growth. To do.

  Therefore, reagent purification, sterilization (antibacterial), and the like can be performed by such a photocatalytic reaction.

Further, in the case of a plurality of LED chips, more ultraviolet rays are emitted, and more visible light having a color is emitted, so that the photocatalytic reaction ability of the photocatalyst is increased and the color is increased. The visible light emission capacity can be increased.
Example 4
FIG. 4 is a block diagram of an electrolyte measuring device according to another embodiment of the present invention mounted on an automatic analyzer.

  First, a predetermined amount of the serum 1 contained in the serum container is sent to the dilution tank 7 by the serum suction pump 2.

  Next, a predetermined amount of the diluted solution 3 contained in the diluted solution storage container is sent to the dilution tank 7 by the diluted solution suction pump 4. In the dilution tank 7, the serum 1 and the diluted solution 3 are agitated to prepare a solution to be measured in which the components in the serum are diluted.

  A predetermined amount of the standard solution 5 contained in the standard solution storage container is sent to the dilution tank 7 by the standard solution suction pump 6.

  This liquid to be measured is sent to the Cl ion selective electrode, the Na ion selective electrode, and the K ion selective electrode unit 8 by the sample suction pump 13, and the potential difference between each ion selective ion selective electrode and the reference electrode is the amplifier 9. The electric signal is sent to the calculation display mechanism 10 to perform a predetermined ion concentration measurement.

  The liquid to be measured is sent to the waste liquid tank 12 after the measurement is completed. A photocatalyst 14 and a light emitter 16 are provided in the container for the diluent 3 and the standard solution 5.

  The light emitter 16 is introduced from the light source in the colorimetric spectrophotometer of the automatic analyzer through the optical fiber 160 (light transmission member).

  The light source generates electromagnetic waves included in ultraviolet rays having a wavelength of 360 to 400 nm. The light emitter 16 is provided at the tip of the optical fiber 160 (light transmission member).

  The ultraviolet rays emitted from the light emitter 1616 strike the photocatalyst and activate it.

  And since the activated photocatalyst forms an active surface with an oxidizing power, it oxidizes and decomposes organic compounds that come into contact with it, and kills microorganisms such as bacteria that come into contact with it or inhibits its growth. To do.

  Therefore, reagent purification, sterilization (antibacterial), and the like can be performed by such a photocatalytic reaction.

  Further, in the case of a plurality of LED chips, more ultraviolet rays are emitted and more visible light having a color is emitted, so that the photocatalytic reaction ability of the photocatalyst is increased and the color is increased. The visible light emission capacity can be increased.

  FIG. 5 shows a block diagram of the biochemical automatic analyzer.

  The biochemical automatic analyzer includes a sample container 101, a sample disk 102, a computer 103, an interface 104, a dispensing probe 105, a reaction container 106, a reaction disk 109, a dispensing probe 110, and a reagent pump 111.

  Furthermore, the biochemical automatic analyzer includes a reagent container 112, a stirrer 113, a light source 114, a photometer 115, an AD converter 116, a printer 117, a CRT 118, a cleaning mechanism 119, a cleaning pump 120, an input device 121, a hard disk 122, and a reagent disk. 125, a container type detection device 150, and a liquid level detection device 151.

A reagent is injected into the dilution tank 130 by the sample pump 107, a sample is injected by the sampling probe 127, and a measurement sample is flowed to the ion sensor 128 by the suction pump 126. The generated potential is signal-processed by the AD converter 129. Measurement is thus performed.
(Example 5)
The stability of the Cl ion selective electrode, Na ion selective electrode and K ion selective electrode was evaluated by Hitachi 7070 biochemical automatic analyzer. The outline of the biochemical automatic analyzer is shown in FIG.

  The evaluation results are shown in FIG.

  Titanium dioxide is used as the photocatalyst, and changes in the slope potential of each ion selective electrode with time when an LED chip is used as the ultraviolet light source are shown.

  Ultraviolet light was introduced from the light source for the colorimetric spectrophotometer of the automatic analyzer into the diluent and standard solution container through the optical fiber.

  As is clear from the evaluation results, it was confirmed that any ion electrode had improved stability.

It is a block diagram of the electrolyte measuring apparatus of Example 1 concerning this invention. It is a block diagram of the electrolyte measuring apparatus of Example 2 concerning this invention. It is a block diagram of the electrolyte measuring apparatus of Example 3 concerning this invention. It is a block diagram of the electrolyte measuring apparatus of Example 4 concerning this invention. It is a schematic diagram of the automatic analyzer concerning this invention. It is the figure which showed the time-dependent change of the slope electric potential of Example 5 concerning this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Serum, 2 ... Serum suction pump, 3 ... Dilution liquid, 4 ... Dilution liquid suction pump, 5 ... Standard solution, 6 ... Standard solution suction pump, 7 ... Dilution tank, 8 ... Ion selective electrode unit, 9 ... Amplifier DESCRIPTION OF SYMBOLS 10 ... Calculation display mechanism, 11 ... Waste liquid pump, 12 ... Waste liquid tank, 13 ... Sample suction pump, 14 ... Photocatalyst, 15 ... LED chip, 16 ... Light emitter, 101 ... Sample container, 102 ... Sample disk, 103 ... Computer, 104 ... Interface, 105 ... Dispensing probe, 106 ... Reaction container, 107 ... Sample pump, 109 ... Reaction disk, 110 ... Dispensing probe, 111 ... Reagent pump, 112 ... Reagent container, 113 ... Stirrer, 114 DESCRIPTION OF SYMBOLS ... Light source, 115 ... Photometer, 116 ... AD converter, 117 ... Printer, 118 ... CRT, 119 ... Cleaning mechanism, 120 ... Cleaning pump DESCRIPTION OF SYMBOLS 121 ... Input device, 122 ... Hard disk, 125 ... Reagent disk, 126 ... Suction pump, 127 ... Sampling probe, 128 ... Ion sensor, 129 ... AD converter, 130 ... Dilution tank, 150 ... Container type detection device, 151 ... Liquid level detection device, 160... Optical fiber (light transmission member).

Claims (8)

An ion selective electrode for detecting the ion concentration of the sample liquid, a standard solution and a diluent supplied to the ion selective electrode and used for potential measurement, a standard solution container for containing the standard solution, and the diluent In an electrolyte measuring device comprising a diluent container for containing
An electrolyte measurement apparatus comprising: a photocatalyst provided in the standard solution storage container and / or the dilution liquid storage container; and a light irradiation unit that mainly irradiates the photocatalyst with ultraviolet light having a wavelength of 360 to 400 nm. The electrolyte measurement device according to claim 1,
An electrolyte measuring apparatus comprising the light irradiation means inside or outside the standard solution container and / or the diluent container. In biochemical automatic analyzers including electrolyte measuring devices,
The electrolyte measuring device includes an ion selective electrode that detects an ion concentration of a specimen liquid, a standard solution and a diluted solution that are supplied to the ion selective electrode and are used for potential measurement, and a standard solution housing the standard solution. A photocatalyst provided inside the container, a diluent storage container for storing the diluent, the standard solution storage container and / or the diluent storage container,
The biochemical automatic analyzer includes a light source that generates electromagnetic waves contained in ultraviolet rays having a wavelength of 360 to 400 nm,
A biochemical automatic analyzer comprising a light transmission member including an optical fiber for guiding an electromagnetic wave generated by the light source to irradiate the photocatalyst. The biochemical automatic analyzer according to claim 3,
A biochemical automatic analyzer characterized in that a light emitter is provided at the tip of the light transmission member. The biochemical automatic analyzer according to claim 4,
A biochemical automatic analyzer characterized in that the light emitter is arranged inside or outside the standard solution container and / or the diluent container. In the electrolyte measuring device according to claim 1 or 2,
An electrolyte measuring apparatus, wherein the photocatalyst is titanium dioxide. The biochemical automatic analyzer according to any one of claims 3 to 5,
A biochemical automatic analyzer characterized in that the photocatalyst is titanium dioxide. In the electrolyte measuring device according to any one of claims 1, 2, and 6,
The said light irradiation means contains 1 or more LED chip or an electric lamp, The electrolyte measuring apparatus characterized by the above-mentioned.

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