JP2019039749A - Inspection tool - Google Patents

Abstract

To provide an inspection tool which excels in handleability and with which it is possible to improve the workability of inspection.SOLUTION: Provided is an inspection tool used in inspection based on the coloring reaction of a test liquid L, comprising: a body unit 20 having a hollow storing space 20h and an opening; and a sampling unit 10 having a based end which communicates with the opening of the body unit 20. The body unit 20 is formed so that the coloration of the test liquid L is visually recognizable from the outside, and the cubic volume of which is reduced when pressed from the outside and restored when the pressing force is released, and the sampling unit 10 has an opening at the tip, and has a hollow communicating space through which the opening at the tip and the opening at the base end communicate with each other, and is formed so that the aperture area at the tip is larger than the sectional area of the communicating space. As the opening at the tip of the sampling unit 10 of an inspection tool 1 is widened, a reaction agent R can be supplied easily and appropriately and can be easily reused, making it possible to simply and appropriately inspect a plurality of test liquids using one instance of the inspection tool.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an inspection tool. More specifically, it is used to inspect rivers, water tanks, septic tanks, water storage tanks, factory water, industrial effluents, boiler water, aqueous solutions from which soil has eluted, and liquids obtained from animals (for example, urine). The present invention relates to an inspection tool.

  In the inspection of water quality such as rivers and industrial wastewater, it is necessary to inspect a plurality of locations, and on-site simple inspection has become the mainstream so that the results can be fed back immediately. In general, as such a simple test, a test paper impregnated with a reaction reagent that develops a color when it reacts with a substance to be tested has been used. However, such a test paper has a problem that the test accuracy is lowered due to oxidation of the reaction reagent with oxygen in the air.

Therefore, as a method for solving the above-described problems, an inspection instrument in which a reaction reagent is sealed is proposed (for example, Patent Documents 1 to 4).
These patent documents disclose a test instrument in which a reaction reagent is sealed inside a transparent or translucent sealed container. Then, when performing inspection, after forming a hole communicating with the inside and outside of the container and pressing it with a finger to discharge the air in the container, the pressed hole is immersed in the liquid to be inspected. It is described that if the inspection target liquid is sucked into the container after the release, the inspection target substance contained in the inspection target liquid reacts with the reaction reagent in the container and is colored. For this reason, if the inspection tool of these patent documents is used, since the enclosed reaction reagent can be maintained in the state which does not touch external air until just before performing a test | inspection, the advantage that the fall of a test | inspection precision can be acquired is acquired.

International Publication No. 2002/090973 JP 2003-149231 A JP 2002-85052 A Japanese Utility Model Publication No. 3-17562

However, in the inspection tools disclosed in the above-mentioned patent documents, the number of inspection tools corresponding to the number of inspection target substances and the number of inspection points to be inspected is prepared because the encapsulated reagent is different for each inspection target substance. Therefore, the inspection work is time-consuming because it must be taken to the site while being stored in a predetermined storage container.
In addition, although the above-described inspection tool of the patent document can inspect the coloration generated when reacting with the encapsulated reaction reagent, it inspects the coloration of the reactant after a plurality of reaction steps. Such a color reaction test cannot be performed. For this reason, in the past, such a substance to be inspected cannot be inspected on-site, so it has been taken back to the laboratory etc., and there is a problem that it takes time to prepare a storage kit for that purpose. is there.
Furthermore, since all of the inspection tools disclosed in the above-mentioned patent documents are disposable, disposal of used inspection tools that occur in large quantities is also a problem.

  In view of the above circumstances, the present invention provides an inspection tool that has excellent handleability and can improve the workability of inspection.

An inspection tool according to a first aspect of the present invention is an inspection tool used for an inspection utilizing a color reaction of a liquid to be inspected, and includes a hollow storage space in which the liquid to be inspected can be stored, A main body portion having an opening for containing a liquid to be inspected, and a sampling portion having an opening at a base end and communicating with the opening of the main body portion, and the main body portion includes the accommodation space. The color of the liquid to be inspected in a state accommodated in the inside is visible from the outside, the volume is reduced when pressed from the outside, and the volume is reduced when the pressure is released. A hollow communication space that communicates between the opening at the distal end and the opening at the proximal end, and the opening area at the distal end is formed to be larger than the cross-sectional area of the communication space. It is characterized by being.
The inspection tool according to a second aspect of the present invention is characterized in that, in the first aspect, the sampling portion is formed so that a cross-sectional area of the communication space gradually increases from the proximal end toward the distal end.
The inspection tool of the third invention is characterized in that, in the first or second invention, the hole diameter of the opening of the main body portion is 2.0 mm or less.
The inspection sheet according to a fourth aspect of the present invention is the first, second or third aspect, wherein the opening of the main body is formed at the tip of a cylindrical guiding portion protruding outward from the surface of the main body. It is characterized by.

According to the first aspect of the present invention, if the tip of the sampling part is immersed in the liquid to be inspected in a state where the main body is pressed and the air inside is discharged, the liquid to be inspected is released by releasing the pressed state of the main body. It can be accommodated by suction in the accommodation space. After storing the liquid to be inspected, if the opening at the tip of the collection part is arranged so as to face upward, the opening at the tip of the collection part is formed so as to expand, so that it can function as a reaction reagent receiving port. . For this reason, a reaction reagent can be supplied simply and appropriately. And after completion | finish of a test | inspection, since it can be easily reused only by discharging | emitting the to-be-inspected liquid, it becomes unnecessary to prepare a new test tool for every object substance. Then, the inspection can be performed easily and appropriately, and the reuse can be easily performed, so that a plurality of liquids to be inspected can be inspected with one inspection tool of the present invention.
According to the second aspect of the present invention, since the cross-sectional area of the communication space of the collection part is formed so as to gradually increase from the base end toward the tip, the reaction reagent can be smoothly supplied into the housing space of the main body part. Can do.
According to the third invention, since the opening of the main body is formed to have a predetermined size, it is possible to suppress leakage of the stored liquid to be inspected to the outside.
According to the fourth invention, since the guide part is provided between the collection part and the main body part, it is possible to more appropriately suppress leakage of the stored liquid to be inspected.

It is a schematic explanatory drawing of the inspection tool 1 of this embodiment. It is a schematic explanatory drawing of the test | inspection tool 1 of this embodiment, (A) is a schematic front view of the test tool 1, (B) is a BB line schematic longitudinal cross-sectional view of (A), (C). These are the schematic plan views of the test | inspection tool 1, (D) is a schematic expansion explanatory drawing of D part of (B). It is explanatory drawing of the usage method of the test | inspection tool 1 of this embodiment. It is explanatory drawing of the usage method of the test | inspection tool 1 of this embodiment.

Next, an embodiment of the present invention will be described with reference to the drawings.
The inspection tool of the present embodiment is a tool used for inspection using the color reaction of the liquid to be inspected, and can easily perform a color reaction according to conditions on the collected liquid to be inspected. Moreover, it is characterized in that it can be easily reused after confirmation of the color reaction.

In addition, if the to-be-inspected liquid which can be extract | collected using the inspection tool of this embodiment is a liquid used as the object of inspection, a generation source etc. will not be specifically limited.
For example, liquids to be tested include rivers, water tanks, septic tanks, industrial wastewater, pool water, well water, well water, middle water, sewage, rainwater, agricultural water, boiler circulating water, cooling water, and other aqueous solutions, and soil. Not only aqueous solutions dispersed in water, but also liquids obtained from animals (for example, urine and blood) and liquids such as organic solvents and oils can be used.
Below, the case where the aqueous solution as described above is used as the liquid to be inspected will be described as a representative.

(Inspection tool 1 of this embodiment)
As shown in FIG. 1, the inspection tool 1 of the present embodiment (hereinafter simply referred to as the inspection tool 1) includes a main body portion 20 and a sampling portion 10 connected to the main body portion 20.

(Main body 20)
The main body portion 20 of the inspection tool 1 is a member having a hollow storage space 20h that can store the liquid L to be inspected therein and an opening 20ah for putting the liquid L to be inspected into the storage space 20h. When the pressure is applied from outside, the volume is reduced, and when the pressure is released, the volume is restored.

  As shown in FIG. 2, the opening 20ah of the main body portion 20 is formed at the tip of a cylindrical guide portion 20a formed to protrude from the surface of the main body portion 20. That is, the main body part 20 is formed with a dropper-shaped guiding part 20a protruding from the surface of the main body part 20, and an opening 20ah of the main body part 20 is formed at the tip (see FIGS. 1 and 2).

  As shown in FIG. 2, the guiding portion 20a is formed with a flow path 20g communicating between both ends, and the flow path 20g is connected to a housing space 20h of the main body 20 and a communication space 10h of the sampling section 10 described later. It is formed so as to communicate with.

(Collecting unit 10)
As shown in FIG. 1 or FIG. 2, the collection unit 10 is connected to the main body unit 20. The sampling part 10 of the inspection tool 1 is a member having an opening at the distal end and the proximal end, and a hollow communication space 10h that communicates between the opening at the distal end and the opening at the proximal end. Specifically, the collection unit 10 is connected to the main body 20 so that the opening at the base end communicates with the opening 20ah of the main body 20.

  As shown in FIG. 1 or FIG. 2, the sampling part 10 is formed such that the opening area of the opening at the tip is larger than the cross-sectional area of the communication space 10h. That is, the sampling unit 10 has a shape in which the opening edge of the distal end is wider outward than the opening edge of the proximal end in a state where the opening of the distal end is directed upward (upward in the drawing in FIG. 2). (See FIG. 2). Then, by forming the opening of the collection part 10 to have the shape as described above, it can function as a receiving port when supplying a reaction reagent R described later, but the details will be described later.

The shape and size of the opening of the collection unit 10 is not particularly limited as long as it functions as described above. Specifically, when supplying a reaction reagent R described later, if it is too small, it may be difficult to supply the reaction reagent R smoothly, and if it is too large, it may be difficult to handle.
Therefore, for example, as shown in FIG. 2, when the opening of the collection part 10 is formed in a substantially circular shape, the opening diameter D2 of the opening of the collection part 10 is about 5 to 30 mm, preferably about 10 to 20 mm, more preferably. Is about 10 mm. In other words, the opening area of about 20 mm ² ~ about 710 mm ² approximately of the sampling part 10, preferably about 80mm ² ~310mm ² about.

  The main body 20 is formed so that the color of the liquid L to be inspected stored in the internal storage space 20h can be observed (viewed) from the outside (see FIG. 4).

  Here, “visible from the outside” means that the entire body 20 is transparent or semi-transparent so that the inside of the body 20 can be visually recognized. Or it is the concept also including the structure which provided the translucent window part. For example, in the case of a structure in which a window part is provided in a part of the main body part 20, if the other part has a structure in which light or the like does not easily enter from the outside, the liquid L to be inspected contained therein is converted into sunlight or the like. It can be protected from ultraviolet rays contained therein. For this reason, it is possible to prevent a substance to be inspected (hereinafter simply referred to as a substance to be inspected) contained in the test liquid L sensitive to light or the like from being decomposed by light or the like. The advantage is obtained.

  Moreover, it is preferable to form the main-body part 20 so that the quantity of the to-be-tested liquid L accommodated in the inside can be grasped | ascertained. For example, as described above, the entirety may be transparent or semi-transparent, and a window portion that can visually recognize the linear interior connecting the bottom portion and the top portion of the main body portion 20 may be provided on the side surface.

(Inspection method by the inspection tool 1 of this embodiment)
Since the configuration is as described above, if the inspection tool 1 of the present embodiment is used, the substance to be inspected contained in the liquid L to be inspected can be easily and appropriately inspected as shown below, and can be easily re-examined. Can be used.

  First, as shown in FIG. 3A, the body 20 of the inspection tool 1 is pressed with a finger f to discharge the air contained in the storage space 20h to the outside (the volume in the storage space 20h is reduced). ). In this state, as shown in FIG. 3 (B), the tip 11 of the sampling part 10 of the inspection tool 1 is immersed in the liquid L to be inspected, and the pressed force of the finger f is gradually released. Release gradually. Since the main body portion 20 is formed of the above-described material, a force that is exerted by an elastic force and tries to restore is applied with the release of the pressed state. Based on this restoring force, the volume in the accommodating space 20h increases, while the atmospheric pressure decreases.

  For this reason, the liquid L to be inspected is sucked from the outside into the accommodation space 20 h of the main body 20. The liquid L to be inspected sucked from the opening of the collection unit 10 passes through the hollow communication space 10h of the collection unit 10 and passes through the opening at the tip of the guide unit 20a of the main body unit 20 (that is, the opening 20ah of the main body unit 20). After that, it flows through the flow path 20g in the guide part 20a toward the base end, and flows into the housing space 20h of the main body part 20 from the base end of the guide part 20a.

  Note that the amount of the liquid L to be inspected can be adjusted by pressing or releasing the main body 20. For example, as shown in FIGS. 1 to 4, if the volume is marked M (for example, 3 ml, 5 ml, etc.) in the main body 20 of the inspection tool 1, the liquid level of the liquid L to be inspected is at the position of the mark M. Can be adjusted to

(Supply of reaction reagent R)
Next, as shown in FIG. 4A, after a predetermined amount of the liquid L to be inspected is accommodated in the accommodating space 20h of the main body 20, the opening of the sampling part 10 of the inspection tool 1 is arranged so as to face upward. To do.
In such a state, the reaction reagent R is supplied while dropping from the container B containing the reaction reagent R toward the opening of the collection unit 10 of the inspection tool 1.

At this time, if the tip of the collection unit 10 has a pointed shape like a dropper, it is usually not assumed that the reaction reagent is supplied from the tip.
However, in the inspection tool 1 of the present embodiment, as shown in FIG. 2, in the collection unit 10 corresponding to the part for collecting the liquid L to be inspected, the opening area of the tip is widened, that is, the opening area of the tip is large. It is formed so as to be larger than the cross-sectional area of the hollow communication space 10 h of the sampling part 10.
For this reason, the opening at the tip of the collection unit 10 serves as a receiving port for the dropping solution of the reaction reagent R, so that the supplied reaction reagent R is appropriately received, and the received reaction reagent R is appropriately accommodated in the housing space in the main body 2. It can be guided into 20h. Then, an appropriate amount of the reaction reagent R can be supplied and reacted with the liquid L to be inspected stored in the storage space 20 h of the main body 20.

  In addition, since the opening at the tip of the collection part 10 of the test tool 1 is formed to have a certain size as described above, even if there is a slight blurring when supplying the reaction reagent R, the container is formed in the opening. If the opening of B is brought close, the reaction reagent R can be supplied smoothly and appropriately.

  Next, as shown in FIG. 4, after a predetermined amount of the reaction reagent R is dropped, the test tool 1 is shaken lightly to the left and right to react the supplied reaction reagent R and the liquid L to be inspected, thereby causing a color reaction. Confirm. At this time, since the main body portion 20 of the inspection tool 1 is formed so that the inside can be visually recognized from the outside, if the color reaction is confirmed, whether or not the inspection target substance is contained in the liquid L to be inspected. Can be determined.

  In addition, as described above, since an appropriate amount of the reaction reagent R can be reliably supplied, it is possible to appropriately grasp the concentration and the like of the test target substance contained in the test liquid L.

  Note that the supply amount of the reaction reagent R may be appropriately adjusted depending on the test concentration of the test target substance (for example, a predetermined detection lower limit, quantitative lower limit, etc.). For example, if it is environmental water and factory wastewater, although the lower limit value etc. differ, it can respond easily only by adjusting the supply amount of the reaction reagent R.

  In addition, the method for determining whether or not the inspection target substance is included in the inspection liquid L is not particularly limited, and if a general standard colorimetric sheet is used, the inspection target substance is included in the inspection liquid L. It is possible to grasp whether or not In addition, the concentration of the inspection target substance can be easily grasped.

By the above-described method, the test target contained in the test liquid L can be obtained simply by supplying the reaction reagent R from the opening of the collection unit 10 while the test liquid L is stored in the storage space 20h of the main body unit 20. The substance can be inspected easily.
Moreover, since the reaction reagent R can be supplied appropriately and easily, the concentration of the substance to be inspected contained in the liquid L to be inspected can be properly grasped.
Therefore, if the inspection tool 1 is used, the inspection accuracy can be improved while improving the workability of the inspection.

(Reuse)
Next, a method of reusing the inspection tool 1 after the color reaction will be described.
First, when the confirmation of the color reaction is completed, in a state opposite to the method in which the liquid L to be inspected is sucked into the storage space 20h of the main body 20, that is, in a state where the sampling part 10 of the inspection tool 1 is directed downward. If the main body 20 is pressed with the finger f, the liquid L to be inspected contained in the accommodation space 20h can be easily discharged to the outside. Then, if the inspection tool 1 is washed with pure water or the like, it can be easily reused again as a color reaction reaction inspection tool.

  In summary, if the inspection tool 1 of the present embodiment is used, the substance to be inspected can be inspected easily and appropriately and can be easily reused. Then, it is possible to inspect different inspection target substances simply by changing the supplied reaction reagent R. For this reason, it is possible to easily inspect a plurality of inspection target substances in the inspection liquid L.

  Therefore, a plurality of substances to be inspected and a plurality of liquids to be inspected L can be inspected with one inspection tool. Then, since it is not necessary to prepare an inspection tool for each substance to be inspected unlike a conventional inspection tool, preparation and carrying baggage can be reduced, so that workability is facilitated. Specifically, if you are a person who conducts inspections, you can inspect all of the substances to be inspected as well as multiple inspection points by preparing a few in addition to the spare. Thus, it is not necessary to prepare several tens of inspection tools for each substance to be inspected and store them in a predetermined storage box or the like, so that the inspection workability can be remarkably improved.

  In addition, since the inspection tool 1 can be easily reused as described above, waste is not generated for each inspection unlike the conventional inspection tool, so that the amount of waste can be reduced.

(Details of the main body 20)
Hereinafter, the main body 20 of the inspection tool 1 will be specifically described.

First, the size of the main body 20 will be described.
The main body 20 of the inspection tool 1 is not particularly limited as long as it has a size and shape that can store the liquid L to be inspected in the storage space 20h as described above, but a person presses the main body 20 with the finger f. It is desirable to make the size and shape easy to handle when performing operations such as sucking or discharging the liquid L to be inspected.

Specifically, if an inspection is performed with a person wearing gloves or the like, if it is too small or too large, it will be difficult to handle, and complicated shapes will also be difficult to handle.
Therefore, when the size of the main body 20 of the inspection tool 1 is, for example, a substantially rectangular shape in plan view (see FIGS. 1 and 4) as shown in FIG. It is formed so that the LD is 30 to 100 mm, preferably 50 to 70 mm, the short side WD is 10 to 30 mm, preferably 15 to 20 mm, and the thickness t is 5 to 15 mm, preferably 7 to 10 mm. In other words, the cross-sectional shape when cut so as to be substantially orthogonal to the central axis of the inspection tool 1 (the shape cut in the left-right direction on the paper surface in FIG. 2A) is formed to be substantially elliptical. In this case, since it can be formed to have a shape that is about the size of a human hand and easy to handle with one hand, the inspection tool 1 can be handled with one hand.

  In addition to the above shape, the main body 20 may have a substantially spherical shape in plan view and a substantially circular or elliptical cross section, or a substantially rectangular shape in plan view, as long as it is a shape that takes into consideration workability as described above. A cross section having a substantially circular shape, an elliptical shape, or a substantially rectangular shape can be employed.

  Further, the capacity in the accommodation space 20h of the main body 20 of the inspection tool 1 is formed so as to be a substantially rectangular shape in plan view with a long side length LD of 55 mm, a short side WD of 15 mm, and a thickness t of about 10 mm. Then, the volume can be formed to about 7 ml. If the test liquid L of this amount can be accommodated, for example, the pH of the test liquid L, nitrous acid (including nitrate), nitric acid (including nitrite), etc. present in the test liquid L It is possible to properly perform the inspection. For example, when inspecting nitrate nitrogen or nitrite nitrogen contained in the liquid L to be inspected, if the liquid L to be inspected is about 2 to 5 ml, not only these environmental standards but also the lower limit of quantification are appropriately inspected. be able to. Further, in the case of free residual chlorine contained in the test liquid L, the concentration corresponding to 0.1 mg / L to 2.0 mg / L can be measured by the DPD method. Furthermore, substances having other environmental standards and the like (for example, bonded residual chlorine, ammonia nitrogen, phosphoric acid, calcium, phenol, potassium permanganate consumption, etc.) can be appropriately inspected.

(Size of the opening 20ah of the main body 20)
As shown in FIG. 2, the main body 20 is formed with the opening 20ah for allowing the liquid L to be inspected to enter the storage space 20h as described above, but this size is not particularly limited. In order to improve the thickness, it is desirable to form the following size.
Specifically, it is formed so as to have a size such that the liquid L to be inspected contained therein does not leak. More specifically, the inspection tool 1 is disposed sideways in a state where the liquid L to be inspected is stored in the storage space 20h. At this time, in a state where the liquid level of the liquid to be inspected L is located above the opening 20ah of the main body part 20, the liquid to be inspected L is formed so as not to leak from the opening 20ah of the main body part 20. Is desirable.

  For example, when the opening 20ah of the main body 20 (see FIGS. 2C and 2D) is formed in a substantially circular shape, the inner diameter at the tip is about 0.5 to 2.0 mm, preferably 0.5 to 1.mm. It is formed to be about 5 mm, more preferably about 0.7 to 1.2 mm. When the inner diameter of the opening 20ah of the main body 20 is larger than 2.0 mm, the liquid L to be inspected is likely to leak to the outside when the inspection tool 1 is placed sideways with the liquid L to be inspected. On the other hand, when the inner diameter of the opening 20ah of the main body 20 is smaller than 0.5 mm, it takes time to suck the liquid L to be inspected.

  Note that the term “substantially circular” is a concept including not only a perfect circle but also a shape close to a certain degree of circle (such as a slightly elliptical shape or a shape having irregularities on the circumference).

Therefore, when the liquid L to be inspected is difficult to leak and the workability is taken into consideration, it is preferable to form the inner diameter of the opening 20ah of the main body 20 so as to be within the above range.
Here, in the on-site site where the liquid L to be inspected is collected, various operations other than the inspection may have to be performed. Therefore, if the opening 20ah of the main body 20 is formed so as to be within the above range, the liquid L to be inspected is accommodated in the accommodating space 20h of the main body 20, and the test tool 1 is temporarily placed next to it. can do. Therefore, at the stage where the liquid L to be inspected is collected in the inspection tool 1, the inspection tool 1 can be temporarily laid down to perform other operations, and at that time, it can be performed using both hands. In addition to preventing work mistakes, work other than inspection can be performed in parallel, so work efficiency can be improved.

(Position of the opening 20ah of the main body 20)
In the main body 20, the position where the opening 20ah is formed is not particularly limited, but it is desirable that the opening 20ah is formed at a position where the liquid L to be inspected is easily collected. For example, as shown in FIG. 1 or FIG. 2, when the main body 20 is formed in a substantially rectangular shape in plan view, the vicinity of the central axis in the long axis direction (for example, the upper portion of the main body 20 in FIG. The opening 20ah is formed in the vicinity of the central axis line of FIG.

(Details of the guiding portion 20a)
The guide part 20a of the main body part 20 is a cylindrical member protruding from the surface of the main body part 20 as described above, and the main body part 20 opening 20ah is formed at the tip thereof. And as shown in FIG. 2, the flow path 20g is formed in this guidance | induction part 20a.
As described above, the flow path 20g is formed so as to communicate with the accommodation space 20h of the main body section 20 and the communication space 10h of the collection section 10, and functions as a flow path when the liquid L to be inspected is collected. Is.
As long as the flow path 20g of the induction | guidance | derivation part 20a has the said function, the flow path diameter will not be specifically limited. For example, the flow path 20g of the guide portion 20a may be formed so that the cross-sectional area decreases from the proximal end toward the distal end opening 20ah, or the sectional area from the proximal end to the distal end is equal to that of the distal end opening 20ah. You may form so that it may become the substantially same magnitude | size as an opening area.

If the latter is formed, the resistance when the liquid L to be inspected moves through the flow path 20g can be increased. Then, it becomes possible to further suppress leakage of the stored liquid L to be inspected due to the interaction between the flow path 20g of the guide portion 20a and the opening 20ah of the main body portion 20. Moreover, even if there is a possibility of leakage only by the opening 20ah of the main body part 20, if the flow path diameter of the flow path 20g of the guiding part 20a is formed to be the above-described size, only the opening 20ah of the main body part 20 is formed. Therefore, it is possible to appropriately suppress the leakage of the liquid to be inspected L as compared with the case of suppressing the leakage of the liquid to be inspected L.
Therefore, if the cross-sectional area of the flow path 20g of the guiding portion 20a is formed so as to be approximately the same as the opening area of the opening 20ah from the proximal end to the distal end, the opening 20ah of the main body portion 20 and the flow path of the guiding portion 20a. Since the 20 g flow path diameter can be increased to some extent, the workability of inspection can be further improved.

  Note that the length of the guide portion 20a is not particularly limited, but it is desirable that the length is easy to handle when a person works. Although the length of the guide portion 20a may be about 100 mm, there is a possibility that the guide portion 20a may be broken or damaged when being carried or handled. For this reason, it is preferable to form it to have a certain length of strength and excellent handleability. For example, in the case of collecting the liquid L to be inspected directly from a tank or the like at the collection site, if the length in the axial direction is about 5 to 40 mm, preferably about 5 to 20 mm, the handleability is good. Since it becomes difficult for the operator's hand or gloves holding the inspection tool 1 to come into contact with the liquid L to be inspected, contamination by the operator's hand or the like can be prevented.

(Configuration in which the guide portion 20a is not provided)
In the above example, the case where the main body portion 20 has a structure including the guiding portion 20a has been described.
In this case, in order to suppress the liquid L to be inspected from leaking even when the inspection tool 1 is in the horizontal position as described above, it is desirable to form the inspection tool 1 to have the following structure.
For example, both are connected so that the opening of the collection part 10 may correspond to the opening 20ah of the main body part 20. At this time, when the opening 20ah of the main body 20 is formed in a circular shape as described above, the inner diameter at the tip is about 0.5 to 2.0 mm, preferably about 0.5 to 1.5 mm, more preferably 0.8. It forms so that it may become about 7-1.2 mm. With such a structure, it is possible to suppress leakage of the liquid L to be inspected even when the inspection tool 1 is laid sideways as described above, so that the same effect as in the above case can be obtained.

(Material of main unit 20)
In addition, if the main-body part 20 is a person who has the said property, the raw material will not be specifically limited. For example, examples of the material of the main body 20 include polyethylene terephthalate (PET), polyethylene (PE), polypropylene (PP), polytetrafluoroethylene, and nylon. When the liquid L to be inspected requires chemical resistance such as strong acidity or strong alkalinity, it is preferable to form a chemically stable synthetic resin (for example, PE, PP, polytetrafluoroethylene) as a material.

(Details of collection unit 10)
Hereinafter, the collection unit 10 of the inspection tool 1 will be described in detail.
As shown in FIG. 1 or FIG. 2, the sampling part 10 of the inspection tool 1 is configured so that the opening area of the opening formed at the tip is larger than the cross-sectional area of the internal hollow communication space 10h as described above. Is formed.

The shape of the opening of the collection unit 10 is not particularly limited as long as the shape has the above function (function as a receiving port when supplying the reaction reagent R).
For example, in a plan view, it can be formed into various shapes such as an elliptical shape and a rectangular shape in addition to the circular shape as shown in FIG. Further, if the size is also considering handleability, the opening area as described above (e.g., about 19 mm ² ~ about 700 mm ² approximately, preferably about 80mm ² ~310mm ² so) can be formed such that.

(When the collection part 10 has a trumpet shape)
In particular, the sampling part 10 is preferably formed so that the cross-sectional area in the hollow communication space 10h gradually increases from the base end toward the tip.

Specifically, it is formed so that the opening area of the distal end of the collection unit 10 is larger than the opening area of the proximal end. For example, the vertical cross-sectional shape ((B) or (D) in FIG. 2) of the sampling unit 10 is such that the inner wall surface is inclined downward toward the central axis from the distal end toward the proximal end, such as a mortar shape or a stepped shape. Form.
That is, as shown in FIG. 1 or FIG. 2, the sampling part 10 is preferably formed so that the appearance thereof is a trumpet shape. In this case, the cross-sectional area of the communication space 10h of the collection unit 10 is formed so as to gradually increase from the proximal end toward the distal end. Then, when the reaction reagent R is dropped onto the upper inner surface of the communication space 10h, the inner surface is inclined downward toward the opening at the proximal end of the collection unit 10, and thus the dropped reaction reagent R is moved along the inner surface of the main body portion 20. Is guided to the opening 20ah.

Moreover, as illustrated in FIGS. 1 to 4, it is desirable that the cross-sectional area of the communication space 10 h of the sampling unit 10 is continuously increased from the proximal end toward the distal end. That is, as shown in FIG. 2, it forms so that the inner surface of the communication space 10h of the collection part 10 may become a smooth surface.
In this case, even if the amount of the reaction reagent R to be supplied is small, it can be reliably guided to the opening 20ah of the main body portion 20. Then, even if the addition amount of the reaction reagent R is small, it can be surely reacted with the liquid L to be inspected. Therefore, the substance to be inspected contained in the liquid L to be inspected and the reaction reagent R are appropriately reacted. Since it can be colored, the substance to be inspected can be appropriately inspected (for example, its concentration) regardless of the amount of reaction reagent R added.

  For example, as shown in FIG. 1 or FIG. 2, when the opening of the sampling part 10 is circular, if the outer diameter of the proximal end is about 1 to 3 mm and the outer diameter D2 of the opening of the distal end is about 10 to 15 mm, As described above, the reaction reagent R can be appropriately supplied, and the size can be made preferable for handling.

The sampling part 10 may be formed so that the opening area at the tip and the opening area at the base end are substantially the same, and the cross-sectional area in the hollow communication space 10h between both ends is also substantially the same.
For example, it forms so that the longitudinal cross-sectional shape of the collection part 10 may become a U-shape (pan shape). That is, the sampling part 10 is formed so that its external appearance is a rectangular shape. In this case, since the amount of the reaction reagent R that can be supplied at a time can be increased, workability can be improved. On the other hand, when the collection part 10 is formed in the above-described shape, the opening at the proximal end may become too large, and the stored liquid L to be inspected is likely to spill. In this case, in a state where the bottom surface is provided at the base end, a communication hole having a size matching the opening 20ah of the main body 20 may be formed in a part thereof.

Further, the longest outer edge distance (opening edge distance ED in FIG. 2) of the sampling portion 10 is formed to be smaller than either the width WD or the thickness t of the main body 20 of the main body 20. It is desirable.
For example, as shown in FIG. 2 (C), when the opening of the sampling part 10 is circular, the outer diameter ED is smaller than the width WD of the main body part 20, so that the inspection tool 1 is attached as described above. It is possible to prevent the inspection tool 1 from rolling when placed sideways.
Then, when the inspection is performed on-site or the like, the mounting state can be maintained even if the mounting surface when mounting the inspection tool 1 is slightly inclined, and a slight wind blows. However, since the inspection tool 1 rolls, the advantage that it can be prevented is obtained.

  The collection unit 10 may be detachably connected to the main body unit 20. In this case, there is an advantage that the shape of the collection unit 10 can be changed according to the use (for example, the collection situation and the amount of the reaction reagent R added).

  Moreover, since the opening of the collection part 10 is formed so that the opening area is larger than the cross-sectional area in the hollow communication space 10h of the collection part 10 as described above, the following advantages are also obtained. .

When collecting the liquid L to be inspected, the amount of the liquid L to be inspected is small and may be present near the bottom surface of the collection container or the like. In this case, when collecting the liquid L to be inspected with a normal dropper or the like, the floating component (SS) is rolled up, and SS is also collected together. When the color reaction is performed in such a state, the coloration result may be lower than the original value or vice versa due to the influence of SS, and an appropriate inspection may not be performed.
However, in the inspection tool 1 of the present embodiment, since the opening of the collection unit 10 has the structure as described above, the suction force when sucking the liquid to be inspected L acts gently. Even when the amount is small, the SS winding can be very small, so that there is an advantage that the inspection target substance contained in the inspection liquid L can be appropriately inspected even if the inspection liquid L is small.

(Explanation when using the inspection tool 1 for color reaction in a plurality of reaction stages)
Next, in the above example, the case where the test liquid L and the reaction reagent R are colored in one stage of the reaction has been described. However, even in the case of a color reaction having a plurality of reaction stages as described below, the present embodiment is implemented. If the form of the inspection tool 1 is used, it can be easily inspected.
Needless to say, the reaction is not limited to the color reaction described below.

For example, first, as shown in FIG. 4 (A), the first reaction reagent R1 is supplied from the opening at the tip of the sampling part 10 of the inspection tool 1 into the accommodating space 20h of the main body part 20 of the inspection tool 1, The first reactant is prepared by reacting with the liquid L to be inspected contained in the accommodation space 20h.
Next, in the state as it is, the second reaction reagent R2 is supplied into the accommodation space 20h of the main body 20 of the inspection tool 1 from the opening at the tip of the sampling part 10 of the inspection tool 1, and the second reaction reagent R2 is present in the accommodation space 20h. A second reactant is prepared by reacting with one reactant.
Then, if the test target substance is present in the test liquid L, the second reactive substance exhibits a predetermined color, and therefore the presence or absence of the test target substance or its concentration can be easily grasped.

As described above, with the inspection tool 1 of the present embodiment, after collecting the liquid L to be inspected, a plurality of reactions as described above can be continuously performed.
For this reason, in the case of a conventional inspection tool, since such a substance to be inspected could not be inspected on-site, the complicated reaction process that was carried back to the laboratory or the like was performed using the inspection tool of this embodiment. If 1 is used, it can be performed on-site and easily, so that the inspection work can be performed more efficiently and speedily.
In other words, since it is possible to inspect even a substance to be inspected that cannot or cannot be inspected on-site conventionally, the efficiency of inspection work can be improved.

In addition, conventionally, even substances that require a certain amount of time for inspection can be performed on-site in a short time, so the results can be fed back to the site in a short time. There are also benefits.

  Hereinafter, a color reaction having a plurality of reaction stages will be described based on specific reaction examples.

For example, when a reaction reagent R that reacts with a substance to be tested under acidic conditions is used, a reagent that generates acid ions when dissolved in a liquid such as hydrochloric acid is first added to bring the liquid L to be tested into an acidic state. Next, a reaction reagent R that generates an aromatic azo compound by a coupling reaction with a reaction substance obtained by reacting the substance to be inspected with the reaction reagent R is added.
Then, if the test target substance is contained in the test liquid L, the first-stage reaction (diazotization reaction) occurs when the test liquid L is brought into an acidic state, and the reaction reagent R is dropped. Then, the second stage reaction (coupling reaction) can be carried out. And if the color of the reactive substance produced | generated by this coupling reaction is confirmed, the substance used as a test object can be grasped | ascertained appropriately.

In addition, in the case where it is difficult to visually confirm the color of the reaction substance generated when the reaction reagent R reacts with the substance to be inspected, there is also a reagent (coloring reagent) that produces a color that can be easily visually confirmed. Can be supplied together.
For example, when detecting nitric acid in the test liquid L, a diazonium salt is formed by reacting sulfanilamide (reaction reagent R1) with nitrogen dioxide derived from nitric acid under acidic conditions. Color is produced. However, it is difficult to visually confirm the yellow color. Therefore, a reagent that reacts with the diazonium salt (for example, naphthylethylenediamine) is supplied as the reaction reagent R2. Then, since the diazonium salt formed by the reaction of nitrogen dioxide and sulfanilamide reacts with naphthylethylenediamine to form an azo compound and exhibits a red color, visual confirmation is easy.

In addition, when the reaction reagent R reacts with the substance to be inspected and colors, when the pH range for the color reaction is limited, the reaction reagent R reacts with the inspection object substance. A buffer that keeps the pH in a specific range may be supplied.
Further, for example, if the reaction reagent R reacts with the substance to be examined in an acidic state, a reagent (reaction inhibitor) that makes the reaction reagent R an alkaline state, or a reaction reagent that is in an alkaline state A reagent (reaction accelerator) that promotes the reaction by supplying an acid to R can also be supplied together.

(Other target substances)
In addition, the substance to be inspected is not limited to the above-mentioned nitric acid or the like or pH as long as it is a substance that causes a color reaction as described above.

For example, when inspecting residual chlorine in tap water, the substance to be inspected is chlorine.
When chlorine is used as an inspection target substance, sulfamyl acid or the like can be used as a reaction reagent R that reacts with chlorine. For example, in the case of sulfamyl acid, when it reacts with chlorine, it turns red. If chlorine is present in tap water, the liquid L to be inspected becomes red. And when the density | concentration of the chlorine in tap water becomes high, the color will become dark. Therefore, if the test liquid L after coloring is compared with the color of the colorimetric sheet, it is possible to grasp the approximate chlorine concentration in tap water.

When the chemical oxygen demand (COD) of river water is inspected, the substance to be inspected is oxygen.
When oxygen is a substance to be examined, permanganic acid, potassium permanganate, or the like can be used as the reaction reagent R that reacts with oxygen. Since permanganic acid and potassium permanganate are red, they are red when not reacting with oxygen. When this reaction reagent R is supplied to the test liquid L, the test liquid L changes to blue if oxygen is present in the river water. As the oxygen concentration increases, the color becomes darker. Therefore, if the color of the test liquid L after coloring is compared with the color of the colorimetric sheet, it is possible to grasp the rough COD of river water.

  Moreover, when inspecting the harmful metal contained in the soil, the dispersion liquid can be used as the inspection liquid L after the soil is dispersed in water. For example, in the case of hexavalent chromium as the inspection target substance, diphenylcarbazide can be used as the reaction reagent R that reacts with hexavalent chromium and colors. If hexavalent chromium exists in the soil, the liquid L to be inspected becomes reddish purple, and when the concentration of hexavalent chromium in the soil increases, the color becomes darker. Therefore, if the color of the test liquid L is compared with the color of the colorimetric sheet, it is possible to grasp the approximate concentration of hexavalent chromium contained in the soil.

  The inspection tool of the present invention is suitable as an inspection tool for inspecting the quality of water such as rivers, water tanks, septic tanks, water storage tanks, factory water, industrial waste water, water for boilers, and water contained in soil. It is also suitable as an inspection tool for animal urine.

DESCRIPTION OF SYMBOLS 1 Test tool 10 Sampling part 10h Communication space of sampling part 20 Main part 20a Guide part 20g Flow path of guide part 20ah Opening of main part 20h Storage space of main part L Test liquid R Reaction reagent

The inspection tool according to the first aspect of the invention is an inspection tool used for an inspection utilizing a color reaction caused by a reaction between a liquid to be inspected and a liquid reaction reagent, and is a hollow housing that can accommodate the liquid to be inspected therein. A space and a main body having an opening for putting the liquid to be inspected in the housing space; and a sampling portion having an opening at a base end and the opening communicating with the opening of the main body, The main body is formed so that the color of the liquid to be inspected in a state accommodated in the accommodation space can be visually recognized from the outside, the volume is reduced when pressed from the outside, and the volume is restored when the pressure is released. And the inspection tool is tilted so that the liquid surface of the liquid to be inspected is located above the opening in a state in which the opening of the main body part accommodates the liquid to be inspected in the accommodating space of the main body part. In a state, the test solution is formed to a size that does not leak. And has the sampling part includes a hollow communication space communicating between the opening of the opening and the proximal end of the tip has an opening at the distal end, the opening area of the tip, of the communication space It is formed so as to be larger than the cross-sectional area, and the external appearance is formed in a trumpet shape so that the dripping liquid can be received when the reaction reagent is dropped to perform a color reaction. .
The inspection tool of the second invention is an inspection tool used for an inspection utilizing a color reaction caused by a reaction between a liquid to be inspected and a liquid reaction reagent, and is a hollow housing that can accommodate the liquid to be inspected therein. A space and a main body having an opening for putting the liquid to be inspected in the housing space; and a sampling portion having an opening at a base end and the opening communicating with the opening of the main body, The main body is formed so that the color of the liquid to be inspected in a state accommodated in the accommodation space can be visually recognized from the outside, the volume is reduced when pressed from the outside, and the volume is restored when the pressure is released. The sampling part has a hollow communication space that has an opening at the tip and communicates between the opening at the tip and the opening at the base end. characterized in that it is formed to be larger than the area (for And, except the reaction reagent and test device, which has previously been accommodated in the accommodating space of the test device).
The inspection tool of the third invention is characterized in that, in the first invention or the second invention, the hole diameter of the opening of the main body is 0.7 mm or more and 2.0 mm or less.
Testing tool of the fourth invention, the first invention, in the second or third invention, the opening of the body portion is formed at the distal end of the tubular guiding portion projecting outwardly from the surface of the body portion The sampling part is formed such that the cross-sectional area of the communication space gradually increases from the proximal end toward the distal end, and the opening inner diameter at the distal end of the sampling part is formed to be 5 mm to 30 mm. and said that you are.

According to the first aspect of the present invention, if the tip of the sampling part is immersed in the liquid to be inspected in a state where the main body is pressed and the air inside is discharged, the liquid to be inspected is released by releasing the pressed state of the main body. It can be accommodated by suction in the accommodation space. After storing the liquid to be inspected, if the opening at the tip of the collection part is arranged so as to face upward, the opening at the tip of the collection part is formed so as to expand, so that it can function as a reaction reagent receiving port. . For this reason, a reaction reagent can be supplied simply and appropriately. In addition, since the opening of the main body is formed to have a predetermined size, it is possible to prevent the stored liquid to be inspected from leaking to the outside, so that workability can be improved. And after completion | finish of a test | inspection, since it can be easily reused only by discharging | emitting the to-be-inspected liquid, it becomes unnecessary to prepare a new test tool for every object substance. Then, the inspection can be performed easily and appropriately, and the reuse can be easily performed, so that a plurality of liquids to be inspected can be inspected with one inspection tool of the present invention.
According to the second aspect of the present invention, if the tip of the sampling part is immersed in the liquid to be inspected in a state where the main body is pressed and the air inside is discharged, It can be accommodated by suction in the accommodation space. After storing the liquid to be inspected, if the opening at the tip of the collection part is arranged so as to face upward, the opening at the tip of the collection part is formed so as to expand, so that it can function as a reaction reagent receiving port. . For this reason, a reaction reagent can be supplied simply and appropriately. And after completion | finish of a test | inspection, since it can be easily reused only by discharging | emitting the to-be-inspected liquid, it becomes unnecessary to prepare a new test tool for every object substance. Then, the inspection can be performed easily and appropriately, and the reuse can be easily performed, so that a plurality of liquids to be inspected can be inspected with one inspection tool of the present invention.
According to the third invention, since the opening of the main body is formed to have a predetermined size, it is possible to more appropriately suppress leakage of the stored liquid to be inspected to the outside.
According to the fourth invention, since the guide part is provided between the collection part and the main body part, it is possible to more appropriately suppress leakage of the stored liquid to be inspected. And since the cross-sectional area of the communication space of the collection part is formed so as to gradually increase from the base end to the front end, and the opening area is formed to be a predetermined size, Can be smoothly supplied into the storage space.

Claims (4)

An inspection tool used for inspection using a color reaction of a liquid to be inspected,
A hollow housing space capable of containing the liquid to be inspected therein, a main body having an opening for containing the liquid to be inspected in the housing space, and an opening at the base end, the opening being an opening of the main body And a sampling section communicated with,
The main body is
The coloration of the liquid to be inspected in the state accommodated in the accommodation space is visible from the outside, the volume is reduced if pressed from the outside, and is restored to release the pressure,
The sampling unit is
A hollow communication space having an opening at the distal end and communicating between the opening at the distal end and the opening at the proximal end;
An inspection tool, wherein an opening area at a tip is formed to be larger than a cross-sectional area of the communication space. The sampling unit is
The inspection tool according to claim 1, wherein a cross-sectional area of the communication space is formed so as to gradually increase from a base end toward a tip end. The inspection tool according to claim 1 or 2, wherein a hole diameter of the opening of the main body is 2.0 mm or less. The opening of the main body is
The inspection tool according to claim 1, 2 or 3, wherein the inspection tool is formed at a tip of a cylindrical guide portion protruding outward from the surface of the main body portion.

Images