JP7243998B2 - Water quality meter and water quality analysis method - Google Patents

Description

The present invention relates to a water quality meter and a water quality analysis method using the same.

As the world's population increases and industrialization progresses, attention is focused on water businesses such as clean water and sewage treatment, seawater desalination to produce fresh water from seawater, reclaimed water treatment to treat domestic and industrial wastewater to the level of clean water, and desalination. It is At the same time, water quality management represented by the detection of heavy metals, organic compounds (oil), nitric acid and nitrous acid contained in wastewater from factories and sewage treatment, and in treated water after oil-water separation is becoming increasingly important. come.

As a method for detecting substances in water, spectrometry using absorption by light of a specific wavelength is widely used. Regarding the detection of substances in water, automation by the flow injection analysis method is being considered, but the measurement items are limited by this method. Therefore, detection of substances in water is basically performed manually by specific workers in specific laboratories, and automating and speeding up the detection is an issue.

On the other hand, in recent years, devices that continuously process fluids in microchannels made by microfabrication technology, so-called microflow systems, have been used in the fields of analysis, biotechnology, medicine, and the synthesis of pharmaceuticals and chemical products. There are many efforts to apply it.

As a feature of microflow systems, as the size of the reaction field decreases, the fluids are rapidly mixed by molecular diffusion, the effect of surface area on the volume of the fluid becomes relatively large, and the effect of heat transfer on the volume of the fluid becomes relatively small. and the reproducibility of the results is excellent. Therefore, it is expected that the detection will be automated and accelerated compared to the conventional manual operation (batch method).

Various developments and studies have been made so far on microflow systems for application to the above analytical fields.
For example, Patent Literature 1 describes a reagent supply device, a reagent container having a flexible soft bag for containing a reagent, a first end inserted into the soft bag of the reagent container, and a second end is connected to a reagent supply destination, and a pump capable of transferring the reagent stored in the soft bag from the first end to the second end of the reagent pipe is stated.

Further, for example, Patent Document 2 discloses a liquid transfer mechanism that sends liquid to a flow channel by changing the volume of a liquid tank that is surrounded by walls. and comprising an incompressible medium in contact with the outer surface of the partition, a container containing the incompressible medium, and a pressure generating means for applying pressure to the incompressible medium, The incompressible medium is sealed in a closed space surrounded by the partition wall and the container, and the pressure is applied to the partition wall via the incompressible medium to deform the partition wall. Are listed.

Further, for example, Non-Patent Document 1 describes a micro reaction channel for reacting sample water and a reagent (analytical reagent), a sample water tank provided below for temporarily storing sample water, a sample A water quality meter unit integrated with a reagent pack (reagent bag) containing analytical reagents suspended in a water tank is described. It is described that in the water quality meter unit, the reagent is added from the middle of the micro-reaction channel by temporarily opening the control valve under the application of back pressure.

Japanese Patent Application Laid-Open No. 2017-181033 Japanese Patent Application Laid-Open No. 2004-226207

Strategic Basic Research Promotion Project CREST research area "Innovative technology and system for realizing sustainable water use" Research subject "Development of model-based smart water quality monitoring network construction technology for water circulation system" Research completion report, page 20 , URL: https://www.jst.go.jp/kisoken/crest/research/s-houkoku/sh_h27/JST_1111074_10101620_2015_PER.pdf

However, when using a pump that is used only for transferring a reagent, as in the apparatus shown in Patent Document 1, it is necessary to prepare such a pump and to install the pump. It is difficult to make it smaller, which leads to an increase in cost.

Further, the liquid transfer mechanism disclosed in Patent Document 2 includes an incompressible medium in contact with the outer surface of the partition wall, a container containing the incompressible medium, and a pressure generating means for applying pressure to the incompressible medium. need to prepare. In order to generate pressure with the pressure generating means, it is necessary to use a piston, a reciprocating positive displacement pump mechanism, or the like, which makes it difficult to reduce the size of the entire device, leading to an increase in cost.

Furthermore, in the water quality meter unit shown in Non-Patent Document 1, the micro-reaction channel and the sample water tank in which the reagent bag is suspended are integrated. Therefore, it is not possible to easily replenish the analysis reagent in the water quality meter unit, specifically in the reagent bag, or to replace the analysis reagent easily.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a water quality meter that does not use a pump that is only used to transfer analytical reagents and that can easily replenish or replace analytical reagents. An object of the present invention is to provide a water quality analysis method using this.

The water quality meter according to the present invention, which has solved the above problems, includes a mixing section for mixing sample water and an analytical reagent, a reaction section for coloring the mixed solution, and at least one of the transmittance and absorbance of the colored solution. An analysis unit having an analysis part for measurement, a sample water inlet into which the sample water is introduced, and a sample water supply connector that supplies the sample water to the analysis unit are provided in the housing, and a substance to be measured in the sample water is provided. and a reagent unit including a reagent bag filled with an analysis reagent for measuring a plurality of times, wherein the reagent unit and the analysis unit are detachably connected to each other via a connecting portion, and the The reagent unit has a reagent supply connector for supplying the analysis reagent to the analysis unit, and the analysis unit includes a reagent introduction connector for introducing the analysis reagent from the reagent supply connector, and the sample water supply connector. a sample water introduction connector through which the sample water is introduced from, the reagent introduction connector and the sample water introduction connector communicate with the mixing section, and the sample water introduced from the sample water introduction port to pressurize the reagent bag to introduce the analytical reagent into the analytical unit.

The present invention provides a water quality meter and a water quality analysis method using the same that do not use a pump that is only used to transfer analysis reagents and can easily replenish or replace the analysis reagents. be able to.
Problems, configurations, and effects other than those described above will be clarified by the following description of the embodiments.

1 is a schematic diagram illustrating the configuration of a water quality meter 101 according to a first embodiment; FIG. FIG. 2 is a schematic diagram illustrating one aspect of a reagent unit 102; FIG. 2 is a schematic diagram illustrating one aspect of an analysis unit 103; FIG. 4 is a schematic configuration diagram for explaining the configuration of a water quality meter 201 according to a second embodiment; FIG. 2 is a schematic diagram illustrating one aspect of a reagent unit 202; 2 is a schematic diagram illustrating one aspect of an analysis unit 203; FIG. FIG. 11 is a schematic diagram illustrating one aspect of a reagent unit 302 in the third embodiment; FIG. 11 is a schematic diagram illustrating one aspect of a reagent unit 402 in the fourth embodiment; FIG. 11 is a schematic configuration diagram illustrating the configuration of a water quality meter 501 according to a fifth embodiment; FIG. 3 is a schematic diagram illustrating one aspect of a reagent unit 502. FIG. FIG. 21 is a schematic configuration diagram illustrating one aspect of an analysis unit 503 in the sixth embodiment; It is a flow chart explaining the contents of the water quality analysis method concerning this embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The following description shows specific examples of the content of the present invention, and the present invention is not limited to these descriptions, and various modifications by those skilled in the art within the scope of the technical ideas disclosed in the present specification. Changes and modifications are possible. In addition, in all the drawings for explaining the present invention, parts having the same functions are denoted by the same reference numerals, and repeated explanations thereof may be omitted.
In this specification, "-" is used to mean having the numerical values before and after it as lower and upper limits. In the numerical ranges described step by step in this specification, the upper limit value or lower limit value described in one numerical range may be replaced with the upper limit value or lower limit value described in other steps.

(Water quality meter 101)
(First embodiment)
FIG. 1A is a schematic diagram illustrating the configuration of the water quality meter 101 according to the first embodiment. FIG. 1B is a schematic diagram illustrating one aspect of the reagent unit 102. As shown in FIG. FIG. 1C is a schematic diagram illustrating one aspect of the analysis unit 103. As shown in FIG.
As shown in FIG. 1A, water quality meter 101 has reagent unit 102 and analysis unit 103 . The water quality meter 101 also has a communication control unit 104 and a power supply unit 105 .

(Reagent unit 102)
As shown in FIG. 1B, the reagent unit 102 includes a sample water inlet 118 into which the sample water 106 is introduced, and an analysis reagent 107 for measuring the substance to be measured in the sample water 106 which is filled multiple times for analysis. A bag 113 is provided.

Here, the sample water 106 can be, for example, tap water, sewage, reclaimed water, temperature control water, agricultural water, etc., regardless of the attributes, characteristics, origins, etc. of water.
Examples of substances to be measured include chlorine, carbon dioxide, sodium chlorite, free cyanide, total cyanide, hexavalent chromium, total chromium, iron, bivalent iron, trivalent iron, hydrogen peroxide, manganese, and nickel. , nitrous acid, nitrite nitrogen, nitric acid, nitrate nitrogen, lead, phenol, total nitrogen, zinc, copper, boron, chemical oxygen demand, formaldehyde, potassium permanganate, arsenic, anionic surfactant , dissolved oxygen, ammonium, ammonium nitrogen, phosphoric acid, phosphate phosphorus, total phosphorus, sulfide (hydrogen sulfide), silica, calcium, free fluorine, ozone, chloride, potassium, soil oil, sulfuric acid, etc. but not limited to these.
As the analysis reagent 107, any commercially available reagent can be used for measuring the above-described measurement target substance.

The sample water 106 introduced into the reagent unit 102 from the sample water inlet 118 is preferably pressurized by any means. Any such means include, for example, tube pumps, syringe pumps, manual syringes, plunger pumps, diaphragm pumps, screw pumps, and the like. In addition, as such an arbitrary means, for example, in addition to a liquid feeding means using a water head difference, branching from a water pipe or the like, or after branching from a water pipe or the like, introducing by controlling the flow rate with a valve Things are also mentioned.

As shown in FIG. 1B, the reagent unit 102 has a housing 112, and the housing 112 is equipped with the above-described reagent bag 113, connector 114, reagent pipe 115, and supply amount control valve . The housing 112 of the reagent unit 102 is also provided with a reagent supply connector 117 , a sample water inlet 118 , and a sample water supply connector 119 .
The connector 114 connects the reagent bag 113 and the reagent pipe 115 . A reagent pipe 115 connects the connector 114 and the supply amount control valve 116 . A supply amount control valve 116 is provided between the reagent supply connector 117 and the reagent bag 113 . In addition, the supply amount control valve 116 can be provided in connection with the reagent supply connector 117, for example, as shown in FIG. 1B. The reagent bag 113, the connector 114, the reagent pipe 115, the supply amount control valve 116, and the reagent supply connector 117 are each formed with a hollow passage through which the analysis reagent 107 can flow.

The reagent supply connector 117 of the reagent unit 102 is detachably connected to the reagent introduction connector 103a (see FIGS. 1A and 1C) of the analysis unit 103, and the solution can flow through the interior thereof. Therefore, the analysis reagent 107 is introduced from the reagent unit 102 into the analysis unit 103 via the reagent supply connector 117 and the reagent introduction connector 103a.

The sample water supply connector 119 of the reagent unit 102 is detachably connected to the sample water introduction connector 103b (see FIGS. 1A and 1C) of the analysis unit 103, and the solution can flow through them. Accordingly, sample water 106 is introduced from reagent unit 102 into analysis unit 103 via sample water supply connector 119 and sample water introduction connector 103b. Note that the sample water 106 is continuously introduced from the sample water inlet 118 and fills the inside of the housing 112 regardless of whether or not the analysis reagent 107 is introduced.

As shown in FIGS. 1A and 1B, the sample water inlet 118 is preferably provided at the bottom or lower side wall of the reagent unit 102 so that the sample water 106 is introduced from below the reagent unit 102 . Moreover, it is preferable that the sample water supply connector 119 is provided on the upper portion of the reagent unit 102 so that the sample water 106 is drawn upward from the inside of the reagent unit 102 . When the sample water inlet 118 and the sample water supply connector 119 are configured in this way, when air bubbles are generated in the sample water 106 in the reagent unit 102, the sample water supply connector 119 provided above the reagent unit 102 Air bubbles can be removed from the Therefore, the analysis reagent 107 can be suitably supplied from the reagent bag 113 without the possibility that the pressure of the sample water 106 is absorbed by the air bubbles. In this embodiment, an air vent (not shown) having a check valve or the like may be provided at the top of the reagent unit 102 in order to remove air bubbles from the inside of the reagent unit 102 to the outside. Moreover, the sample water 106 may be previously subjected to degassing or the like.

The reagent supply connector 117 is preferably provided above the reagent unit 102 so as to match the sample water supply connector 119 . Further, the reagent supply connector 117 and the sample water supply connector 119 have the same lead-out direction in which the analytical reagent 107 is led out from the reagent supply connector 117 and the lead-out direction in which the sample water 106 is led out from the sample water supply connector 119. A direction is preferred. Furthermore, it is preferable that the lead-out direction and the attaching/detaching direction of the reagent unit 102 and the analysis unit 103 are the same. With this arrangement, as will be described later, when the reagent unit 102 and the analysis unit 103 are attached and detached, the sample water supply connector 119 and the sample water introduction connector 103b are attached and detached, and the reagent supply connector 117 and the reagent introduction connector are attached and detached. 103a can be easily attached and detached.

The analysis reagent 107 is introduced from the reagent bag 113 into the analysis unit 103 through the connector 114, the reagent pipe 115, the supply amount control valve 116, and the reagent supply connector 117 and the reagent introduction connector 103a. Here, as described above, the reagent bag 113 is pressurized by the pressure of the sample water 106 as the case 112 is filled with the sample water 106 . Then, by opening the supply amount control valve 116 installed at the tip of the reagent bag 113 for a certain period of time, a certain amount (for one analysis) of the analytical reagent 107 is supplied from the pressurized reagent bag 113 to the analysis unit 103 . can be supplied to Since there is a correlation between the opening time of the supply amount control valve 116 and the discharge amount of the analysis reagent 107 with respect to the pressure applied to the reagent bag 113, the analysis reagent 107 filled in the reagent bag 113 is You can predict when it will run out.

The size of the reagent bag 113 is determined according to the expiry date, the amount of use, and the number of analyses, so that the deterioration of the analytical reagent 107, that is, the influence on the analysis results, is minimized. is appropriately changed according to the filling amount of
The analysis reagent 107 in the reagent bag 113 may deteriorate during use if it is exposed to air or contains dissolved air. The air in the analytical reagent 107 is removed by degassing the air in the analytical reagent 107 before filling the reagent bag 113, or by filling the reagent bag 113 with the analytical reagent 107 and then introducing nitrogen or the like. Alternatively, filling the reagent bag 113 in a nitrogen atmosphere can minimize the amount of air that contacts the analysis reagent 107 .

(analysis unit 103)
As shown in FIG. 1C, the analysis unit 103 includes a mixing section 131 that mixes the sample water 106 and the analytical reagent 107, a reaction section 132 that develops the mixed solution, and at least one of transmittance and absorbance of the colored solution. It has an analysis unit 133 that measures one side. Analysis unit 103 introduces sample water 106 and analysis reagent 107 to color the solution, measures at least one of transmittance and absorbance of the solution, and then discharges the solution as treatment liquid 108 . The analysis unit 103 also has the reagent introduction connector 103a and the sample water introduction connector 103b, as described above. The reagent introduction connector 103a and the sample water introduction connector 103b of the analysis unit 103 communicate with the mixing section 131 via the microchannel 134, respectively.

The analysis unit 103 may be one using a microflow system. That is, the analysis unit 103 mixes the sample water 106 and the analysis reagent 107 in the microchannel 134 described above, develops the color of the mixed solution, and measures the permeability of the solution. In order to perform such processing in the microchannel 134, the representative length of the channel diameter of the microchannel 134 (that is, the channel width and diameter) is preferably 2 mm or less. In particular, in order to rapidly mix the sample water 106 and the analysis reagent 107 by molecular diffusion, the representative length of the channel diameter is preferably in the range of several tens of μm to 1 mm. By doing so, the amount of the analytical reagent 107 to be used and the amount of the treatment liquid 108 to be discharged can be greatly reduced. The length of the microchannel 134 can be appropriately set in consideration of the time required for the substance to be measured and the analysis reagent 107 to mix and react.

The analysis section 133 of the analysis unit 103 has a light source 135, a spectroscopic cell 136 and a light receiving section 137 for measuring the transmittance and/or absorbance of the colored solution. Light source 135 emits light of a predetermined wavelength toward spectroscopic cell 136 . The spectroscopic cell 136 has a channel (optical path) through which the colored solution flows. Both ends of the spectroscopic cell 136 are transparent so as to transmit light, and light 138 from the light source 135 is incident on the solution flowing through the spectroscopic cell 136 . As shown in FIG. 1C, the light source 135 is arranged near one end of the spectral cell 136, and the light receiving section 137 is arranged near the other end. That is, the light 138 emitted from the light source 135 is incident from one end side of the spectroscopic cell 136 , passes through the channel, and then passes from the other end side of the spectroscopic cell 136 toward the light receiving section 137 . The light receiving unit 137 receives the light 139 transmitted through the spectroscopic cell 136 , measures the transmittance and the like, and transmits the data 111 (see FIG. 1A) to the communication control unit 104 .

As the length of the spectroscopic cell 136, which is the optical path length, is increased, even a solution containing a substance to be measured at a low concentration can be measured, and the measurement accuracy is improved. However, increasing the length of the spectroscopic cell 136, which is the optical path length, increases the internal volume of the spectroscopic cell 136, increasing the amount of the analytical reagent 107 to be used and the amount of the processing liquid 108 to be discharged. Therefore, the representative length of the cross section of the spectroscopic cell 136 (that is, the width or diameter of the cross section perpendicular to the optical path passing through the spectroscopic cell 136) is preferably 2 mm or less. The length of the spectroscopic cell 136 is preferably in the range of 10-50 mm.

(Coupling portion 123)
The reagent unit 102 and the analysis unit 103 are detachably connected to each other via a connecting portion 123 (see FIGS. 1B and 1C). For example, the coupling portion 123a (see FIG. 1B) provided in the vicinity of the reagent supply connector 117 and the sample water supply connector 119 of the reagent unit 102, the reagent introduction connector 103a and the sample water introduction connector of the analysis unit 103. 103b can be embodied by a connecting portion 123b (see FIG. 1C) provided at a position corresponding to the connecting portion 123a.

As the coupling portion 123, for example, one of the coupling portions 123a and 123b may be a magnet and the other may be a magnetic material such as iron, or may be a magnet with magnetic poles that attract both of them. By doing so, the reagent unit 102 having the reagent bag 113 filled with the analysis reagent 107 can be easily replaced. As a result, the water quality meter 101 can easily replenish or replace the analytical reagent 107 simply by removing the reagent unit 102 and replacing it with a new reagent unit 102 .

Concerning the connection between the reagent unit 102 and the analysis unit 103, a convex portion and a concave portion are provided at a predetermined position of the housing 112 of the reagent unit 102 and a predetermined position of the housing 103c (see FIG. 1C) of the analysis unit 103, respectively. (neither shown) may be provided to employ a mating construction. In this way, when the reagent unit 102 and the analysis unit 103 are connected, by fitting these recesses and projections together, more reliable positioning and connection can be achieved.

(Communication control unit 104)
The communication control unit 104 receives from the analysis unit 103 at least one of transmittance data and absorbance data 111 regarding the transmittance measured by the analysis unit 103 . The communication control unit 104 also transmits and receives signals and data (both not shown) to and from the outside. Furthermore, the communication control unit 104 also controls the reagent unit 102 and the analysis unit 103 . Further, the communication control unit 104 is necessary to operate various pumps (not shown), open/close valves (not shown), turn on/off the light source 135, receive data 111 from the light receiving unit 137, and transmit the data 111 from the light receiving unit 137. Various controls 110 and the like are performed.

(Power supply unit 105)
The power supply unit 105 includes appropriate power supply means such as a battery, AC power supply, and DC power supply, and supplies power 109 to the reagent unit 102 , analysis unit 103 , and communication control unit 104 .

(Material of wetted parts that come into contact with liquid)
In the case 112, the reagent bag 113, the connector 114, the reagent pipe 115, the supply amount adjustment valve 116, the reagent supply connector 117, the sample water inlet 118, the sample water supply connector 119, etc. in the reagent unit 102 described above, the liquid The material of the wetted parts (portions and parts that come into contact with the liquid) that come into contact with the liquid should not adversely affect the sample water 106, the analytical reagent 107, the mixing of the sample water 106 and the analytical reagent 107, and the subsequent reaction. For example, it can be changed as appropriate according to the types of sample water 106 and analysis reagent 107 .

The material of the liquid-contacting part in the analysis unit 103 that contacts the liquid does not adversely affect the sample water 106, the analytical reagent 107, the mixing of the sample water 106 and the analytical reagent 107, and the subsequent reaction. It can be changed as appropriate according to the types of sample water 106 and analysis reagent 107 .

Examples of materials for the liquid-contacting parts in the reagent unit 102 and the liquid-contacting parts in the analysis unit 103 include silicone resin, ABS (acrylonitrile-butadiene-styrene) resin, PP (polypropylene) resin, PE (polyethylene) resin, and PEEK. Various resins such as (polyether/ether/ketone) resins and fluorocarbon resins, stainless steel, silicon, glass, and various materials used for three-dimensional printer ink can be used. Examples of various materials used in three-dimensional printer ink include ABS resin, ABS-like resin, ASA (acrylonitrile-styrene-acrylic rubber) resin, PC-ABS (polycarbonate-ABS) resin, PLA (polylactic acid) resin, PP-like resins, PEI (polyetherimide) resins, rubber-like resins, gypsum, polyamide resins, photocurable acrylic resins, PC resins, PP resins, waxes, and the like. In the present embodiment, the wetted portion may be made of glass lining, a metal surface coated with nickel or gold, or a silicon surface oxidized to improve corrosion resistance. good. It should be noted that it is not necessary to use the same material for all of the wetted parts, and it is possible to change the material as appropriate according to workability, flexibility of the tube, and the like.

(Operation of water quality meter 101)
As described above, the water quality meter 101 includes the reagent unit 102 including the sample water inlet 118 , the sample water supply connector 119 and the reagent bag 113 , and the analysis unit 103 . Reagent unit 102 and analysis unit 103 of water quality meter 101 are detachably connected to each other via connecting portion 123 .

With such a configuration, the water quality meter 101 can introduce the sample water 106 to be measured into the reagent unit 102 and further from the reagent unit 102 into the analysis unit 103 . The water quality meter 101 pressurizes the reagent bag 113 with the pressure of the sample water 106 introduced into the reagent unit 102 , and introduces the analysis reagent 107 included in the reagent bag 113 into the analysis unit 103 . In this way, the water quality meter 101 does not use a pump or the like that is used only to transfer the analytical reagent when introducing the sample water 106 and the analytical reagent 107 into the analytical unit 103 . In other words, the water quality meter 101 does not require a pump used only to transfer the analysis reagent 107 to the analysis unit 103, which was conventionally required. Therefore, the cost of the water quality meter 101 can be reduced and the overall size of the device can be reduced.

Moreover, as described above, in the water quality meter 101, the reagent unit 102 and the analysis unit 103 are detachably connected to each other via the connecting portion 123. As shown in FIG. As described above, the reagent supply connector 117 of the reagent unit 102 is detachably connected to the reagent introduction connector 103a of the analysis unit 103, and the solution can flow through them. Also, the sample water supply connector 119 of the reagent unit 102 is detachably connected to the sample water introduction connector 103b of the analysis unit 103, and is coupled so that the solution can flow through them. Therefore, the water quality meter 101 can easily replenish or replace the analytical reagent 107 simply by removing the used reagent unit 102 and attaching a new reagent unit 102 .

In addition, in the water quality meter 101 , the reagent unit 102 includes a reagent bag 113 . Therefore, when the substance to be measured is changed, in the water quality meter 101, simply changing the reagent unit 102 to a reagent unit 102 equipped with a reagent bag 113 containing an analysis reagent 107 corresponding to the substance to be measured can easily be used. It can handle various types of substances to be measured.

(Second embodiment)
Next, the water quality meter 201 according to the second embodiment will be explained.
FIG. 2A is a schematic diagram illustrating the configuration of the water quality meter 201 according to the second embodiment. FIG. 2B is a schematic diagram illustrating one aspect of the reagent unit 202. As shown in FIG. FIG. 2C is a schematic diagram illustrating one aspect of the analysis unit 203. As shown in FIG.
As shown in FIG. 2A, water quality meter 201 has reagent unit 202 and analysis unit 203 . The water quality meter 201 also has a communication control unit 104 and a power supply unit 105 .

As shown in FIG. 2A, the water quality meter 201 does not require control (see control 110 in FIG. 1) or supply of power (see power supply 109 in FIG. 1) to the reagent unit 202, which is the same as the water quality of the first embodiment. Although different from the total 101, other constituent elements are the same as in the first embodiment.

As shown in FIG. 2B, the reagent unit 202 has a housing 112, and inside the housing 112, the reagent bag 113, the connector 114, and the reagent pipe 115 are provided. The housing 112 of the reagent unit 202 is also provided with a reagent supply connector 117 , a sample water inlet 118 , and a sample water supply connector 119 . As shown in FIG. 2B, the reagent pipe 115 described above is connected to a reagent supply connector 117 . That is, the reagent unit 202 shown in FIG. 2B does not have a valve for supplying the analytical reagent 107 to the analysis unit 203 (a valve corresponding to the supply amount control valve 116 shown in FIG. 1B).

In addition, the water quality meter 201 according to the second embodiment has an introduction amount adjustment valve 216 that plays a role corresponding to the supply amount adjustment valve 116 in the reagent unit 102 shown in FIG. 1B of the first embodiment, as shown in FIG. In addition, it is provided on the analysis unit 203 side. The introduction amount adjustment valve 216 is a valve that adjusts the amount of introduction of the analysis reagent 107 into the analysis unit 203 . Specifically, the introduction amount control valve 216 is provided between the reagent introduction connector 103 a and the mixing section 131 .

The introduction amount control valve 216 can be configured in the same manner as the supply amount control valve 116 and can be controlled. Therefore, in the water quality meter 201, the analysis unit 203 can control the supply amount of the analysis reagent 107, which was performed by the reagent unit 102 in the first embodiment. In this case, the introduction amount control valve 216 is preferably provided between the reagent introduction connector 103 a and the mixing section 131 in the analysis unit 203 . In such a mode, since the introduction amount adjustment valve 216 is provided on the analysis unit 203 side, control and power supply to the reagent unit 202 are not required. Therefore, the water quality meter 201 can make the reagent unit 202 inexpensive. Therefore, the water quality meter 201 is suitable for the disposable reagent unit 202 .

In this embodiment, the reagent supply connector 117 of the reagent unit 202 is in an open state, so it is preferable to keep it sealed until it is coupled with the analysis unit 203 . When replacing the reagent unit 202, the analytical reagent 107 remaining in the reagent bag 113 or the like may come out from the reagent supply connector 117, so the reagent supply connector 117 should be sealed after removal. to prevent this.

(Third Embodiment)
Next, a water quality meter according to the third embodiment will be described.
FIG. 3 is a schematic diagram illustrating one aspect of the reagent unit 302 in the third embodiment. A water quality meter (not shown) according to the third embodiment includes a reagent unit 302 shown in FIG. 3 instead of the reagent unit 102 (see FIGS. 1A and 1B) in the first embodiment. Although different from the water quality meter 101 according to the embodiment, other constituent elements are the same as those of the first embodiment.

As shown in FIG. 3, reagent unit 302 has housing 112 . Inside the housing 112, there are provided a plurality of reagent bags 313 filled with the analytical reagent 107 in an amount sufficient for multiple analyses, a connecting connector 314, a reagent pipe 115, and a supply amount adjusting valve . The housing 112 of the reagent unit 302 is also provided with a reagent supply connector 117 , a sample water inlet 118 , and a sample water supply connector 119 . The supply amount control valve 116 described above is provided between the reagent supply connector 117 and the reagent bag 113 . Also, the reagent supply connector 117 is detachably connected to the reagent introduction connector 103a (see FIG. 1A) of the analysis unit 103, and the sample water supply connector 119 is detachable to the sample water introduction connector 103b (see FIG. 1A) of the analysis unit 103. is coupled to

The analysis reagent 107 is supplied from at least one of the plurality of reagent bags 313 via a connecting connector 314 connecting the reagent bag 313 and the reagent pipe 115, the reagent pipe 115, the supply amount control valve 116, and the reagent supply connector. 117 to the analysis unit 103 . Here, the plurality of reagent bags 313 are pressurized by the pressure of the sample water 106 by filling the housing 112 with the sample water 106 . By opening the supply amount control valve 116 installed at the tip of the reagent bag 313 for a certain period of time, a certain amount (for one analysis) of the analysis reagent 107 can be discharged.

As in the first embodiment, there is a correlation between the opening time of the supply amount control valve 116 and the discharge amount of the analysis reagent 107 with respect to the pressure applied to the reagent bag 313. The time until the filled analysis reagent 107 runs out can be predicted. The reagent unit 302 and the analysis unit 103 are detachably connected by a connecting part 123, as in the first embodiment. Therefore, the water quality meter (not shown) according to the third embodiment can easily replenish or replace the analytical reagent 107 simply by removing the used reagent unit 302 and attaching a new reagent unit 302 .

The size of the reagent bag 313 is determined according to the expiration date, the amount of use, and the number of times of analysis of the analytical reagent 107 so that the deterioration of the analytical reagent 107, that is, the influence on the analysis result is minimized. is appropriately changed according to the filling amount of Furthermore, by changing the number of reagent bags 313, the filling amount of the analysis reagent 107 can be easily changed.

Further, for example, when the case 112 and the analysis reagent 107 have the same volume in the third embodiment and the first embodiment, one reagent bag 113 is used in the example shown in the first embodiment. On the other hand, in the example shown in the third embodiment, the analytical reagent 107 is subdivided into a plurality of reagent bags 313 and stored. Therefore, the specific surface area of the plurality of reagent bags 313 in the third embodiment with respect to the same volume of analysis reagent 107 is larger than the specific surface area of the reagent bag 113 in the first embodiment. Therefore, the plurality of reagent bags 313 in the third embodiment are easily subjected to the pressure of the sample water 106, and the amount of the analytical reagent 107 to be supplied to the analytical unit 103 can be controlled more precisely.

Furthermore, in the present invention, the sample water is used to pressurize the reagent bag. Therefore, if the reagent bag were to be damaged, the sample water would be mixed into the reagent bag, and the analysis reagent could react with the sample water. In this case, as shown in the example of the first embodiment, if the reagent unit 102 contains only one reagent bag 113, depending on the amount of sample water 106 that has been mixed, all the analytical bags in the reagent unit 102 The reagent 107 becomes unusable and the reagent unit 102 needs to be replaced. On the other hand, as shown in the example of the third embodiment, when there are a plurality of reagent bags 313 included in the reagent unit 302, even if one reagent bag 313 is damaged, the contents of the damaged reagent bag 313 Only the analysis reagent 107 becomes unusable, and there is no problem with the analysis reagent 107 in the other reagent bag 313 . Usually, the analytical reagent 107 is filled in excess with respect to the necessary amount from the viewpoint of the stability of the analytical result. Therefore, if one reagent bag 313 is damaged and the sample water 106 is mixed, the effect on the analysis reagent 107 is small, and there is a possibility that the reagent unit 302 does not need to be replaced.

Here, like the reagent bag 313 in the first embodiment, the material of the reagent bag 313 adversely affects the sample water 106, the analytical reagent 107, the mixing of the sample water 106 and the analytical reagent 107, and the subsequent reaction. If not, it can be changed as appropriate according to the types of sample water 106 and analysis reagent 107 .

Also, in the example shown in FIG. 3, one connecting connector 314 is used for one reagent bag 313, and the connecting connectors 314 are connected to each other. The connecting connectors 314 are connected, for example, by fusion bonding, bonding, screwing, fitting, or the like, one end of one connecting connector 314 to the other end of another connecting connector 314 . However, the present embodiment is not limited to this. For example, a plurality of connecting connectors 314 are molded as an integrated connector (not shown), and the required number of reagent bags 313 are connected to the integrated connector. You may

Note that the reagent unit 302 shown in FIG. 3 illustrates a case where there are five reagent bags 313, but the number of reagent bags 313 may be two, three, four, or six or more.

(Measurement of residual chlorine)
Here, based on the DPD (diethylparaphenylenediamine) method, the results of measuring residual chlorine with a water quality meter (not shown) equipped with the reagent unit 302 described in the third embodiment will be described.
Tap water was used as the sample water 106 and a DPD reagent was used as the analytical reagent 107 . Tap water was stored in a container, and the tap water stored in the container was sucked and sampled by operating the pump, and introduced into the sample water inlet 118 as the sample water 106 .
As the reagent bags 313, four bags each having an internal volume of 2.5 mL were used, and when the supply amount control valve 116 was opened for 1 second, the introduction amount of the DPD reagent at that time was 10 μL. .
After tap water and the DPD reagent were mixed in the microchannel 134 and the mixed solution was colored, the colored solution was spectroscopically measured with the optical path length of the analysis cell set to 10 mm. As a result, it was confirmed that the water quality meter equipped with the reagent unit 302 described in the third embodiment can measure with an error within ±2.5% compared to the value of the conventional residual salt meter.

(Fourth embodiment)
Next, a water quality meter according to the fourth embodiment will be described.
FIG. 4 is a schematic diagram illustrating one aspect of the reagent unit 402 in the fourth embodiment. A water quality meter (not shown) according to the fourth embodiment includes a reagent unit 402 shown in FIG. 4 in place of the reagent unit 102 (see FIGS. 1A and 1B) in the first embodiment. Although different from the water quality meter 101 according to the embodiment, other constituent elements are the same as those of the first embodiment.

As shown in FIG. 4, reagent unit 402 has housing 112 . Inside the casing 112, there are provided a foldable reagent bag 413, a connector 114, a reagent pipe 115, and a supply control valve 116, filled with the analytical reagent 107 in an amount sufficient for multiple analyses. The housing 112 of the reagent unit 402 is also provided with a reagent supply connector 117 , a sample water inlet 118 , and a sample water supply connector 119 . The supply amount control valve 116 described above is provided between the reagent supply connector 117 and the reagent bag 113 . Also, the reagent supply connector 117 is detachably connected to the reagent introduction connector 103a (see FIG. 1A) of the analysis unit 103, and the sample water supply connector 119 is detachable to the sample water introduction connector 103b (see FIG. 1A) of the analysis unit 103. is coupled to

The analysis reagent 107 is supplied from the reagent supply connector 117 to the analysis unit 103 from the reagent bag 413 via the connector 114 connecting the reagent bag 413 and the reagent pipe 115, the reagent pipe 115, and the supply amount control valve 116. . Here, the sample water 106 fills the housing 112 and the folded reagent bag 413 is pressurized by the pressure of the sample water 106 . By opening the supply amount control valve 116 installed at the tip of the reagent bag 413 for a certain period of time, a certain amount (for one analysis) of the analysis reagent 107 can be discharged.

As in the first embodiment, there is a correlation between the opening time of the supply amount control valve 116 and the discharge amount of the analysis reagent 107 with respect to the pressure applied to the reagent bag 413. The time until the filled analysis reagent 107 runs out can be predicted. The reagent unit 402 and the analysis unit 103 are detachably connected by a connecting part 123, as in the first embodiment. Therefore, the water quality meter (not shown) according to the fourth embodiment can easily replenish or replace the analytical reagent 107 simply by removing the used reagent unit 402 and attaching a new reagent unit 402 .

The size of the reagent bag 413 is determined according to the expiry date, the amount of use, and the number of analyses, so that the deterioration of the analytical reagent 107, that is, the influence on the analysis results, is minimized. is appropriately changed according to the filling amount of

Further, for example, when the housing 112 and the analysis reagent 107 have the same volume in the fourth embodiment and the first embodiment, one reagent bag 113 is used in the example shown in the first embodiment. In contrast, in the example shown in the fourth embodiment, the analytical reagent 107 is filled in the reagent bag 413 having a folding structure. Therefore, the specific surface area of the reagent bag 413 having the folded structure in the fourth embodiment is larger than the specific surface area of the reagent bag 113 in the first embodiment with respect to the same volume of analysis reagent 107 . Therefore, the reagent bag 413 having the folded structure according to the fourth embodiment is easily subjected to the pressure of the sample water 106, and the amount of the analytical reagent 107 to be supplied to the analytical unit 103 can be controlled more precisely.

Here, the material of the reagent bag 413 is any material that does not adversely affect the sample water 106, the analytical reagent 107, the mixing of the sample water 106 and the analytical reagent 107, and the subsequent reaction. It can be changed as appropriate according to the type of the reagent 107 for use. The material of the reagent bag 413 is preferably made by pasting together thin sheet-like (film-like) materials in order to achieve a folding structure. As the material of the reagent bag 413, for example, a resin sheet (resin film) of various resins such as acrylic resin, PC (polycarbonate) resin, PET (polyethylene terephthalate) resin, PE (polyethylene) resin can be used. Further, the reagent bag 413 has a gas-blocking property and prevents adhesion of the substance to be measured to the surface, for example, by vapor-depositing the surface of the resin sheet (resin film) with aluminum, silicon oxide, or aluminum oxide (alumina). can be done. The thin sheet in this specification means, for example, a thickness of about 10 to 2000 μm.

A resin sheet (resin film) can be joined or cut by changing the laser intensity or wavelength. The folding portion can be made easier to fold by partially welding.
Although the reagent bag 413 shown in FIG. 4 has a meandering structure, it is not limited to this, and may have a bellows structure or a structure in which the periphery is folded toward the center like a flower bud. . If the reagent bag 413 has these folded structures, the specific surface area can be increased.

(Fifth embodiment)
Next, a water quality meter according to the fifth embodiment will be described.
FIG. 5A is a schematic configuration diagram illustrating the configuration of a water quality meter 501 according to the fifth embodiment. FIG. 5B is a schematic diagram illustrating one aspect of the reagent unit 502. As shown in FIG.
As shown in FIG. 5A, water quality meter 501 has reagent unit 502 and analysis unit 103 . The water quality meter 501 also has a communication control unit 104 and a power supply unit 105 .

As shown in FIGS. 5A and 5B, the water quality meter 501 has a sample water inlet 518 of the reagent unit 502 with a branch portion 518a, and the branch portion 518a and the sample water supply connector 519 are pipes for sample water. 503, and the reagent unit 502 has a sample water drain port 504, which is different from the water quality meter 101 according to the first embodiment. Similar to morphology.

As shown in FIG. 5B, the reagent unit 502 has a housing 112, and the reagent bag 113, the connector 114, the reagent pipe 115, and the introduction amount control valve 116 are provided inside the housing 112. . Further, the housing 112 of the reagent unit 502 is provided with a reagent supply connector 117 , a sample water inlet 518 , a sample water supply connector 519 , and a sample water outlet 504 .

As shown in FIGS. 5A and 5B, the branching portion 518a of the sample water inlet 518 branches the introduced sample water 106 and introduces a portion into the reagent unit 502, and the other portion for the sample water. It is introduced into the sample water supply connector 519 through the pipe 503 . The sample water 106 introduced into the reagent unit 502 from the branch portion 518 a of the sample water introduction port 518 is discharged from the sample water discharge port 504 . With this configuration, the sample water 106 introduced from the sample water supply connector 519 is directly and immediately supplied to the analysis unit 103 via the sample water pipe 503 and the sample water supply connector 519 . Therefore, even if the composition of the sample water 106 changes rapidly, the water quality meter 501 can detect the change more quickly without leveling the composition change with the sample water 106 in the housing 112 . It becomes possible.

Further, in the first to fourth embodiments, the sample water 106 for pressurizing the reagent bags 113 (313, 413) in the housing 112 and the sample water 106 to be introduced into the analysis unit 103 are common. . Therefore, in these embodiments, if the reagent bag 113 were to be damaged, the sample water 106 would be affected by the analytical reagent 107 in the reagent bag 113, and it would be necessary to replace the sample water 106 in the housing 112. necessary. On the other hand, in the mode shown in the fifth embodiment, the supplied sample water inlet 518 branches the introduced sample water 106 into the reagent unit 502 and the sample water supply connector 519 . Therefore, in the aspect shown in the fifth embodiment, even if the reagent bag 113 is damaged, the sample water 106 introduced into the analysis unit 103 is not affected. No action is required and the analysis can be continued.

(Sixth embodiment)
Next, a water quality meter according to the sixth embodiment will be described.
FIG. 6 is a schematic diagram illustrating one aspect of the analysis unit 603 in the sixth embodiment. The water quality meter (not shown) according to the sixth embodiment includes an analysis unit 603 shown in FIG. 6 instead of the analysis unit 103 (see FIGS. 1A and 1C). Although different from the total 101, other constituent elements are the same as in the first embodiment.

As shown in FIG. 6, the analysis unit 603 has an analysis unit sheet 611 inside the housing 103c. The analysis unit sheet 611 uses a thin sheet-like or film-like material. 631 and reaction part 632 are formed. A spectroscopic cell 636 similar to the spectroscopic cell 136 in the first embodiment is attached on the analysis unit sheet 611 .

In this way, the analysis unit 603 includes the microchannel 634 and the spectroscopic cell 636 in which the sample water 106, the analytical reagent 107, and the treatment liquid 108 mixed and reacted by them flow, and the solution in the spectroscopic cell 636 for spectroscopic measurement. The light source 635 and the light receiving section 637 are included.

After the water sample 106 and the analytical reagent 107 introduced into the analysis unit 603 are mixed in the microchannel 634 of the mixing section 631, the substance to be measured and the analytical reagent 107 in the water sample 106 are mixed in the microchannel of the reaction section 632. It develops color by reacting in channel 634 . The colored solution is introduced into the spectroscopic cell 636 of the analysis unit 633 and discharged as the treatment liquid 108 .

Both ends of the spectroscopic cell 636 are transparent so as to allow the light 138 to pass therethrough, similarly to the spectroscopic cell 136 in the first embodiment. can do. In order to expose the light source 635 to the spectroscopic cell 636, the analysis unit sheet 611 can be provided with a light source notch 635a shown in FIG. 6, if necessary. Further, since the analysis unit sheet 611 exposes the light receiving section 637 to the spectroscopic cell 636, the notch 637a for the light receiving section shown in FIG. 6 can be provided as necessary.

Light 139 obtained by passing through the colored solution can be measured by the light receiving section 637 . The light receiving section 637 transmits data 111 of at least one of transmittance data and absorbance data 111 to the communication control unit 104 .

In order to perform such processing in the microchannel 634, the representative length of the channel diameter of the microchannel 634 (that is, the channel width and diameter) is preferably 2 mm or less. In particular, in order to rapidly mix the sample water 106 and the analysis reagent 107 by molecular diffusion, the representative length of the channel diameter is preferably in the range of several tens of μm to 1 mm. By doing so, the amount of the analytical reagent 107 to be used and the amount of the treatment liquid 108 to be discharged can be greatly reduced.

As the length of the spectroscopic cell 636, which is the optical path length, is made longer, it becomes possible to measure even a solution containing the substance to be measured at a low concentration, thereby increasing the measurement accuracy. However, increasing the length of the spectroscopic cell 636, which is the optical path length, increases the internal volume of the spectroscopic cell 636, increasing the amount of the analysis reagent 107 to be used and the amount of the treatment liquid 108 to be discharged. Therefore, the representative length of the cross section of the spectroscopic cell 636 (that is, the width or diameter of the cross section perpendicular to the optical path passing through the spectroscopic cell 636) is preferably 2 mm or less. The length of the spectroscopic cell 636 is preferably in the range of 10-50 mm.

Here, the material of the analysis unit 603 is a material that does not adversely affect the sample water 106, the analytical reagent 107, and the mixture of the sample water 106 and the analytical reagent 107 and the subsequent reaction. It can be changed as appropriate according to the type of analysis reagent 107 . As described above, the analysis unit sheet 611 is made by laminating thin sheet-like or film-like materials. The analysis unit sheet 611 can be formed using resin sheets (resin films) of various resins such as acrylic resin, PC (polycarbonate) resin, PET (polyethylene terephthalate) resin, and PE (polyethylene) resin. Furthermore, the analysis unit sheet 611 has a resin sheet (resin film) whose surface is vapor-deposited with aluminum, silicon oxide, or aluminum oxide (alumina). can. In such an analysis unit sheet 611, microchannels 634 can be formed by, for example, not irradiating the part that will become the channel with a laser, and irradiating the other part with a laser to fuse or adhere. can be done.

The material of the spectroscopy cell 636 should be transparent so that both ends can transmit light, but other parts need not reflect light. For example, transparent materials used for both ends of the spectroscopic cell 636 include various resins such as ABS resin, PP (polypropylene) resin, PE (polyethylene) resin, glass, and the like. Materials used for portions other than the ends of the spectroscopic cell 636 include silicone resin, PEEK (polyether ether ketone) resin, fluorine-based resin, and three-dimensional printer ink, in addition to the transparent materials described above. Various materials can be used. The materials described above can be used for the various materials used for the ink of the three-dimensional printer.
As for the light source 635 and the light receiving section 637, those used in normal spectroscopic measurement can be used.

When the analysis unit 603 is used in combination with the reagent units 102, 202, 302, 402, 502 described in any of the first to fifth embodiments, and the reagent units 102, 202, 302, 402, 502 are replaced , the analysis unit 603 or the analysis unit sheet 611 can be replaced at the same time to minimize the influence of dirt and air bubbles on the surface of the flow path in the analysis unit 603 on the analysis results. In particular, when the analysis unit sheet 611 is replaced, the problem of contamination and air bubbles on the channel surface in the analysis unit 603 can be solved easily and at low cost. In other words, according to the present embodiment, when dirt or air bubbles are present on the surface of the channel inside the analysis unit 603, this can be resolved.

(Water quality analysis method)
Next, the water quality analysis method according to this embodiment will be described.
FIG. 7 is a flow chart for explaining the details of the water quality analysis method according to this embodiment.
The water quality analysis method according to this embodiment can be suitably performed using the water quality meters according to the first to sixth embodiments described above. In the following description, the first embodiment will be representatively referred to for the configuration and operation of the water quality meter, and the same reference numerals as in the first embodiment will be assigned to the components that are common to the first embodiment. detailed description is omitted.

The water quality analysis method according to this embodiment includes an analysis unit 103 and a reagent unit 102, and the reagent unit 102 and the analysis unit 103 are detachably connected to each other via a connecting portion 123. 101 is used to analyze water quality.

As shown in FIG. 7, the water quality analysis method according to this embodiment includes an introduction step S1, a mixing step S2, a reaction step S3, and an analysis step S4.

In the introduction step S1, the pressure of the sample water 106 introduced from the sample water introduction port 118 pressurizes the reagent bag 113 to introduce the analysis reagent 107 into the analysis unit 103 and the sample introduced from the sample water introduction port 118. Water 106 is introduced into analysis unit 103 . Therefore, in this introduction step S1, the conventionally required pump used only for transferring the analysis reagent 107 to the analysis unit 103 becomes unnecessary. Therefore, in the water quality analysis method according to the present embodiment, the introduction step S1 can be performed at a lower cost than the conventional method, and the size of the entire apparatus can be reduced.
In the subsequent mixing step S2, the introduced analytical reagent 107 and the sample water 106 are mixed in the mixing section 131 .
In the subsequent reaction step S3, the mixed solutions are reacted in the reaction section 132 to develop a color.
In the subsequent analysis step S4, the analysis unit 133 measures at least one of the transmittance and absorbance of the colored solution.

As described above, the water quality analysis method according to this embodiment can be suitably performed using the water quality meters according to the first to sixth embodiments described above. Therefore, in the water quality analysis method according to the present embodiment, a series of steps from the introduction step S1 to the analysis step S4 are performed multiple times (that is, the sample water 106 is analyzed multiple times), and the remaining amount of the analytical reagent 107 is When the reagent unit 107 is lost or deteriorated, the reagent unit 102 for analysis can be easily replenished or replaced simply by removing the reagent unit 102 and replacing it with a new reagent unit 102 .

Although the water quality meter and water quality analysis method according to one embodiment of the present invention have been described in detail above, the gist of the present invention is not limited to this, and includes various modifications. For example, the above-described embodiments have been described in detail in order to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the described configurations. Also, part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Moreover, it is possible to add, delete, or replace part of the configuration of each embodiment with another configuration. For example, the reagent units 302, 402, and 502 shown in the third to fifth embodiments are provided with the supply amount adjustment valve 116, but this is eliminated, and the analysis unit 103 is provided with a valve corresponding to the supply amount adjustment valve 116. (Refer to the reagent unit 202, the analysis unit 203 and the supply amount control valve 216 shown in the second embodiment).

Further, each configuration, function, processing unit, processing means, control means, and the like described above may be realized by hardware, for example, by designing a part or all of them using an integrated circuit. Moreover, each of the above configurations, functions, etc. may be realized by software by a processor interpreting and executing a program for realizing each function. Information such as programs, tables, and files that implement each function can be stored in recording devices such as memories, hard disks, SSDs (Solid State Drives), or recording media such as IC cards, SD cards, and DVDs.
Furthermore, control lines and information lines indicate those considered necessary for explanation, and not all control lines and information lines are necessarily indicated on the product. In practice, it may be considered that almost all configurations are interconnected.

As described above, the sample water 106 includes, for example, tap water, sewage, reclaimed water, temperature control water, and agricultural water, regardless of the attributes, characteristics, and origin of water. However, in the present invention, even a solution containing an extremely small proportion of water is mixed with the analytical reagent 107 in the microchannel 134, the mixed solution is colored, and the permeability of the solution is measured. If it is possible to do so, the water quality meter mentioned above can be applied.

101, 201, 501 water quality meter 102, 202, 302, 402, 502 reagent unit 103, 203, 603 analysis unit 131, 631 mixing section 132, 632 reaction section 133, 633 analysis section 106 sample water 118, 518 sample water inlet 119 sample water supply connector 112 housing (reagent unit housing)
103c chassis (analysis unit chassis)
107 Analysis reagent 113, 313, 413 Reagent bag 123, 123a, 123b Coupling portion 117 Reagent supply connector 103a Reagent introduction connector 103b Sample water introduction connector 116 Supply amount adjustment valve 216 Introduction amount adjustment valve 503 Sample water pipe 518a Branch portion
S1 Introduction step S2 Mixing step S3 Reaction step S4 Analysis step

Claims (10)

an analysis unit having a mixing section for mixing sample water and an analysis reagent, a reaction section for coloring the mixed solution, and an analysis section for measuring at least one of transmittance and absorbance of the colored solution;
The housing is provided with a sample water inlet through which the sample water is introduced and a sample water supply connector that supplies the sample water to the analysis unit, and an analysis reagent for measuring a substance to be measured in the sample water is analyzed a plurality of times. a reagent unit comprising a partially filled reagent bag;
with
The reagent unit and the analysis unit are detachably connected to each other via a connecting portion,
the reagent unit has a reagent supply connector that supplies the analysis reagent to the analysis unit;
The analysis unit has a reagent introduction connector into which the analytical reagent is introduced from the reagent supply connector, and a sample water introduction connector into which the sample water is introduced from the sample water supply connector,
the reagent introduction connector and the sample water introduction connector communicate with the mixing section;
A water quality meter, wherein the pressure of the sample water introduced from the sample water introduction port pressurizes the reagent bag to introduce the analysis reagent into the analysis unit. In claim 1 ,
A water quality meter comprising a supply amount adjusting valve for adjusting a supply amount of the analysis reagent between the reagent supply connector and the reagent bag. In claim 1 ,
A water quality meter comprising an introduction amount adjusting valve for adjusting an introduction amount of the analysis reagent between the reagent introduction connector and the mixing section. In claim 1,
A water quality meter comprising a plurality of said reagent bags. In claim 1,
A water quality meter, wherein the reagent bag is folded within the reagent unit. In claim 1,
A water quality meter, wherein the reagent bag is a sheet-like or film-like material laminated together. In claim 1,
The sample water inlet has a branching portion for branching the introduced sample water and introducing a portion thereof into the reagent unit and introducing another portion thereof to the sample water supply connector through the sample water pipe. A water quality meter characterized by: In claim 1,
A water quality meter, wherein the mixing section and the reaction section are made by pasting together sheet-like or film-like materials. In claim 1,
A water quality meter, wherein the connecting portion uses a magnet provided at a predetermined position of at least one of the reagent unit and the analysis unit. an analysis unit having a mixing section for mixing sample water and an analysis reagent, a reaction section for coloring the mixed solution, and an analysis section for measuring at least one of transmittance and absorbance of the colored solution; and the sample water. and a sample water supply connector for supplying the sample water to the analysis unit. a reagent unit including a reagent bag, wherein the reagent unit and the analysis unit are detachably coupled to each other via a coupling portion, and the reagent unit supplies the analysis reagent to the analysis unit. The analysis unit has a reagent supply connector for supplying reagents, and the analysis unit includes a reagent introduction connector into which the analysis reagent is introduced from the reagent supply connector, and a sample water introduction connector into which the sample water is introduced from the sample water supply connector. , wherein the reagent introduction connector and the sample water introduction connector analyze water quality using a water quality meter communicating with the mixing unit ,
The reagent bag is pressurized by the pressure of the sample water introduced from the sample water introduction port, the analysis reagent is introduced into the analysis unit, and the sample water introduced from the sample water introduction port is subjected to the analysis. an introduction step of introducing into the unit;
a mixing step of mixing the introduced analysis reagent and the sample water in the mixing unit;
a reaction step of reacting the mixed solution in the reaction section to develop a color;
an analysis step of measuring at least one of the transmittance and the absorbance of the colored solution in the analysis unit;
A water quality analysis method characterized by having

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