JPH0731171Y2 - Test liquid inspection body - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention relates to a test body capable of easily detecting various components in a test liquid, for example, urine, in the entire surface opposite to the reagent layer surface of the support. Alternatively, by providing a liquid-absorbing portion in part, during use, excess test liquid remaining on the reagent layer surface of the support is removed, thereby preventing reagent outflow and interference reaction between reagent layers, As a result, the present invention relates to a test liquid test sample which can be easily judged by coloration or the like.

(Prior art) Whether or not there are various components in body fluids such as blood, urine, lymph, etc., and various test liquids such as cooling water of internal combustion engine or edible oil, etc. That is extremely important in practice.

Conventionally, the test liquid test object used for such an application is one or a plurality of double-sided adhesive tapes as a reagent layer, which is a filter paper obtained by impregnating a reagent composition on the surface of a support made of a plastic plate such as polyvinyl chloride or polystyrene. Since it is relatively inexpensive and easy to use, the test liquid test body prepared by adhering by a method such as adhesion or directly applying the reagent composition to the surface of the support by a printing method or a coating method is used in various fields. It's being used. Usually, the test liquid specimen is immersed in the test liquid at the time of use, or the test liquid is dropped on the test liquid specimen, and the test liquid is changed depending on the color change of the reagent layer at that time. The presence or absence of the desired component, the amount, etc. are determined, but in this case,
The reagent contained in the reagent layer often flows out due to an excessive amount of the test liquid on the test body, or the outflow contaminates another reagent layer adjacent to the reagent layer, which makes it impossible to make an accurate determination. is there.

In order to prevent such problems, various improvements have been proposed. For example, a test liquid test body has been proposed in which a part for absorbing the test liquid is provided on a part or the whole surface of the support on the reagent layer side. However, in this case, it is necessary to sufficiently separate the distances between the reagent layers, and unnecessary coloration due to the excess test liquid remaining and retained in the absorption portion around the reagent layer and the reagent layer are likely to occur, and There are drawbacks such as the complexity of manufacturing the liquid inspection body itself.

On the other hand, a method has been proposed in which a portion of the support on the reagent layer surface side is provided with a portion that repels the test liquid and blocks its entry to prevent the movement of the excess test liquid and prevent interference between the reagent layers. ing. However, in this case, excess test liquid remains in liquid form on the surface other than the reagent layer on the support, side surface, or back surface,
Since it is held, it may scatter or reflow due to vibration during handling, which is not preferable.

(Problems to be Solved by the Invention) An object of the present invention is to provide a test liquid test sample that does not have the above-mentioned drawbacks, is easy to manufacture, is easy to handle, and can perform accurate judgment and evaluation. And

(Means for Solving the Problem) The inventors of the present invention have surprisingly studied to improve the above-mentioned drawbacks of the conventional test liquid test specimen, and as a result, surprisingly, a liquid absorbing portion having an appropriate liquid retaining property was unexpectedly found. By providing the non-reagent layer surface, that is, a part or the whole of the back surface of the support, the above-mentioned drawbacks are eliminated, and excess test liquid on the reagent layer surface, that is, the support surface is removed, and the reagent from the reagent layer which induces this The present invention has been found out that it is possible to provide a test liquid test sample which can effectively prevent the outflow of the reagent and prevent the interference reaction between the reagent layers, and as a result can perform a clear judgment and evaluation.

That is, the present invention relates to a test liquid test body in which a reagent layer for testing a test liquid is provided on a support, and both ends of the support on the surface opposite to the reagent layer surface, in the whole or in the longitudinal direction. The subject is a test liquid test body, which is characterized in that a liquid absorbing portion is provided along the side.

(Operation) Hereinafter, the present invention will be described in detail based on the embodiments shown in the drawings.

FIGS. 1 (a) to (d) and FIGS. 2 (a) to (d) are explanatory views showing a urine test body, which is a type of body fluid test body which is one embodiment of the test liquid test body of the present invention. , (A) is a perspective view, (b) is a side view, (c) is a front view, and (d) is a rear view.

In the figure, reference numeral 5 denotes a body fluid test body, which is a flat rectangular support body 3 made of a plastic thin plate having a thickness of 200 to 300 μm and a surface of the support body 3 impregnated with a solution of a reagent composition. The reagent layers 7 and 7'are formed by attaching filter papers 1 and 2 with double-sided adhesive tapes 6 and 6 '. The reagent layers 7 and 7'in this embodiment are constructed so that urine test items such as glucose detection, protein detection, and pH measurement can be tested. In this embodiment, there are two types of reagent layers, 7 and 7 ', but in reality, there may be one type depending on the purpose, and it is possible to attach a plurality of types of reagent layers and inspect a plurality of items at once. can do.

The sample liquid absorbent material 4 is attached to the back surface of the support 3 with a double-sided adhesive tape or the like. Examples of the test liquid absorbing material include paper, synthetic resin, woven cloth, non-woven cloth, etc. having the test liquid absorbing property. Examples of paper include filter paper, absorbent paper, and in some cases water-soluble paper and water-dispersible paper.
Examples of synthetic resins include porous nylon and polyvinyl alcohol. Further, examples of woven and non-woven fabrics include those made of manila hemp, cotton, nylon, rayon and other synthetic fibers.

Furthermore, it is also effective to subject the back surface of the support to corona discharge treatment or the like to directly impart absorbency to the back surface of the support.
However, as a preferred example, a thickness of 20 with a reagent layer on the surface is provided.
Toyo Filter Paper No. 514 with a thickness of about 0.4 mm is attached to the back surface of a support made of a polyvinyl chloride white thin plate of about 0 to 300 μm with a double-sided adhesive tape or the like.

It is preferable that the test liquid absorptive site extends over the entire back surface on which the reagent layer is present, but in some cases, as shown by 4 and 4'in FIG. You may follow along.

In using the test liquid test body 5 configured as described above, the end portions of the support 3 are gripped to immerse the reagent layers 7 and 7 ′ in the test liquid, and the reagent layers 7 and 7 are taken out. The presence / absence, amount, etc. of the specific component in the liquid can be known by the color change of ', but in this case, the excess test liquid accumulated on the reagent layers 7, 7'or on the support 3 between both reagent layers. Is easily absorbed around the side surface 8 of the support 3 by the test liquid absorbent site 4, so that the reagent layer 7,
No excess liquid remains on the 7'and on the support 3. Therefore, the outflow of the reagent from the reagent layers 7, 7'is prevented, the accompanying interference between the reagent layers 7, 7'is eliminated, and the reagent layers 7, 7'are eliminated.
Since the excess test liquid remaining on the surface due to the surface tension is removed, the coloration of the reagent layers 7 and 7'can be easily seen.

Furthermore, since all excess test liquid goes to the back surface of the support,
Unnecessary stains and uneven coloring will not occur on the surface.

Since the test liquid test object of the present invention has the above-mentioned configuration, it has an advantage of being easy to manufacture.

(Effect of the Invention) According to the present invention, the following industrially useful and excellent practical effects are achieved.

Even when several different types of detection units are provided on the carrier, since there is no liquid absorption site on the same side wall as the detection units, restrictions on the distance and space between the detection units are eliminated.

Since the detection part and the liquid absorption part are present on the opposite (back) side walls different from each other via the support, when the excess test liquid is held at this liquid absorption part, the reagent of the detection part is absorbed. Very little outflow to the liquid site. Therefore, the coloration at the detection part is hardly hindered, and the excess liquid to be detected and the reagent slightly flowing out to the liquid absorption site do not cause unnecessary coloration on the same side wall. It does not interfere with the color monitor in the room at all.

In order to install the liquid absorption site, instead of processing on the same side wall and adjacent to the detection section, which generally has many restrictions such as high mutual interference, it is possible to deal with processing on the opposite (back) surface side via the support Therefore, it is remarkably advantageous from the viewpoint of the productivity of the test liquid test sample, and can be provided at a low cost.

In contrast to the conventional wiping of the test liquid with the rim of the container, an extra amount of the test liquid can be dispensed with without forcing the user to perform any special operation. Can be removed.

At the same time when the test solution is immersed in the test solution and then taken out of the container, the removal of an excessive amount of the test solution by the absorptive site on the side opposite to the reagent layer surface of the support is actually started. It does not droop and pollute the surroundings.

Excessive amount of test liquid can be removed without manual operation such as wiping with the rim of the container or stacking the test paper and the absorbent paper on the opposite side edge, so it has excellent reproducibility. A clear color is obtained.

Compared with the conventional test piece structure, it is sufficient to provide the liquid-absorbing portion on the surface of the support opposite to the surface of the reagent layer, which is extremely advantageous from the viewpoint of productivity.

[Brief description of drawings]

FIGS. 1 (a) to (d) and FIGS. 2 (a) to (d) are explanatory views showing a urine test body, which is a type of body fluid test body which is one embodiment of the test liquid test body of the present invention. , (A) is a perspective view, (b) is a side view, (c) is a front view, and (d) is a rear view. 1: filter paper, 2: filter paper, 3: support, 4, 4 ': test liquid absorption site,
5 : Body fluid test body, 6,6 ': Double-sided adhesive tape, 7,7': Reagent layer, 8: Side surface

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-61-86657 (JP, A) JP-A-62-55559 (JP, A) JP-A-57-187656 (JP, A) Actual development Sho-61- 114366 (JP, U) Actually opened Sho 62-3067 (JP, U) Japanese Patent Sho 58-8747 (JP, B2)

Claims (1)

[Scope of utility model registration request] 1. A test liquid test body in which a reagent layer for testing a test liquid is provided on a support, wherein both ends of the support on the side opposite to the reagent layer surface, in the whole or in the longitudinal direction. A test liquid inspection body, which is provided with a liquid-absorbing portion along the side.