JPH1194819A - Analyzer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the back flow of a liquid sample and to enable cost reduction by bonding a reaction layer carrier composed of a chromatography material to a sheet material to assemble the same into a hollow case opened at least on the sample adding side thereof. SOLUTION: For example, a liquid sample analyzer using chromatography is equipped with a liquid sample water absorbing part 1, a reaction layer 2 and a sheet like reaction layer carrier composed of a water absorbing part 3. The reaction layer carrier is bonded to a sheet material 4 provided with the adding window 5 aligned with the liquid sample adding part 1 in size and position and a confirming window 6 for observing a measured result or the like and an analyzer is assembled as a case having a triangular pyramid shape or the like having the reaction layer carrier provided to the inside thereof and opened at both ends thereof. If the liquid sample is added to the adding window 5, the liquid sample penetrates from the liquid sample adding part 1 and the measured result in the reaction layer 2 appears on the confirming window 6. Since the excessive sample flows out to the outside from an opening part, the back flow or overflow to the reaction part is not generated and certain chromatography can be executed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an analyzer using chromatography, and relates to an improvement in the structure of a case for holding a reaction layer carrier made of a chromatography material.

[0002]

2. Description of the Related Art Chromatography is widely used in chemical tests and clinical tests of liquid samples. As a conventional analyzer, there is one in which a reaction layer carrier made of a chromatography material is held in a stick-shaped hollow casing made of a liquid-impermeable resin material such as a plastic. Analysis is performed with addition.

[0003]

However, in the conventional analyzer, since the hollow casing is made of plastic or the like, a precision machine is required for mass production, leading to an increase in cost. Also, since it is disposable, disposal of plastic waste is difficult.

[0004] On the other hand, during the analysis operation, the hollow casing has no opening except for the liquid sample addition section, and both ends of the casing are closed. In some cases, a liquid sample may accumulate in the entire casing and may flow backward or exceed the inside of the casing, so that chromatography may not be performed reliably and analysis may not be performed.

[0005]

SUMMARY OF THE INVENTION In the present invention, the production of an analyzer is simplified to reduce costs, a case can be made of a material other than a resin material to reduce resin waste, and the liquid sample is allowed to flow backward. It is intended to improve the analysis accuracy by preventing overrun.

In order to solve the above problems, the analyzer according to the present invention is arranged such that the liquid sample addition section of the reaction layer carrier made of the chromatography material is positioned at the liquid sample addition window formed on the sheet material. After bonding the layer carrier to the sheet material, the sheet material is assembled so that at least the end on the side to which the liquid sample is added becomes a hollow case.

[0007] With this structure, it is difficult for the excess liquid sample to flow into the case, and even if it flows, it flows out of the case through the opening, so that the liquid sample can be prevented from flowing backward or upward to the reaction portion of the reaction layer carrier, and the measurement accuracy can be improved. I do. Further, by assembling the case from the sheet material, the resin molding does not have to be performed, and it is possible to perform various developments other than the resin material.

The sheet material in the present invention is, for example, paper,
It can be like wood, pottery, glass. The sheet material is preferably a material having a strength capable of holding the shape when processed into a three-dimensional shape, and the three-dimensional shape forming the analyzer is constituted by a cylindrical or polygonal surface. The cavity has a cylindrical structure in which at least one end on the sample addition section side communicates with the outside.

The use of this analyzer avoids the use of precision equipment such as a mold apparatus for molding and expands options by increasing the types of constituent materials other than the resin material, thereby significantly reducing costs and reducing resin waste. Reduction, backflow to the reaction part
Improvement of the measurement accuracy is realized by preventing the upward movement.

[0010] In the present invention, the reaction layer carrier is a test strip made of a chromatographic material composed of an arbitrary porous carrier such as nitrocellulose or glass fiber filter paper. Alternatively, it has a function of analyzing, detecting, and quantifying a specific substance using an arbitrary measurement principle such as an antigen-antibody reaction.
Liquid samples include, for example, water, aqueous solutions, urine, blood, body fluids, solids, and solutions in which powders and gases are dissolved, and test items include, for example, urine tests, pregnancy tests, water quality tests, and stool tests. .

As a result, an apparatus capable of easily and reliably measuring a liquid sample as an arbitrary solution to be inspected is realized as a measuring apparatus with reduced resin waste, reduced cost, and improved measurement accuracy. .

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The invention according to claim 1 of the present invention is arranged such that the liquid sample addition portion of the reaction layer carrier made of a chromatography material is positioned at the liquid sample addition window formed on the sheet material. After bonding the reaction layer carrier to the sheet material, the analyzer is an analyzer that assembles the sheet material so as to form a hollow case with an open end at least on the side to which the liquid sample is added. It is possible to prevent the carrier from flowing backward or upward to the reaction section, and to produce a case without resin molding.

(Embodiment) An embodiment of the present invention described in claim 1 of the present invention will be described below with reference to FIGS.

FIG. 1 shows a chromatographic material for performing an immunoassay. This is hereinafter referred to as a reaction layer carrier. In FIG. 1, reference numeral 1 denotes a liquid sample adding section for adding a liquid sample formed of a nonwoven fabric or the like. When a partial region of the liquid sample addition section 1 comes into contact with the liquid sample, the liquid sample penetrates and reaches the region of the reaction layer 2 made of nitrocellulose or the like.
A specific protein is immobilized in the region of the reaction layer 2, and a sandwich of a labeled antibody in the liquid sample addition section 1 for visually measuring an antigen-antibody reaction and an antibody immobilized in the reaction layer 2 is provided. The antigen is measured by the reaction.
The liquid sample is finally sucked by the water absorbing section 3 and the measurement is completed. The nonwoven fabric and nitrocellulose in these reaction layer carriers are merely examples, and may be composed of any porous carrier.

FIG. 2 is a plan view of the sheet material to which the reaction layer carrier is adhered, after assembling it as an analyzer, FIG. 3 is a developed view of the sheet material, and FIG. 4 is a perspective view of the analyzer.

In the figure, reference numeral 4 denotes a sheet material for adhering the reaction layer carrier, and the number of the reaction layer carriers to be held in close contact is not necessarily one, but a cylindrical or polygonal cylindrical member. A plurality of types of reaction layer carriers to be analyzed may be bonded to the side surface. For the adhesion of the reaction layer carrier, it is desirable to use an adhesive resin material such as an acrylic resin such as a tape or a glue, or a starch, and hold the sheet material so that there is no gap between the side surfaces of the sheet material. This can prevent the liquid sample from wrapping around.

Reference numeral 5 denotes an addition window provided in accordance with the size of the liquid sample adding section 1 of the reaction layer carrier, and the reaction layer carrier is bonded to the addition window 5 so that the liquid sample adding section 1 is positioned.
The addition window 5 is located on the side surface when the sheet material is assembled as a case.

Reference numeral 6 denotes a confirmation window for confirming the measurement result, one of which is a window for confirming the end of the measurement reaction. It is not necessary to provide two windows, and one or many windows may be provided. If the inside of the sheet material 4 can be seen, no window is required.

The carrier for the reaction layer shown in FIG. 1 is adhered to the sheet material 4 shown in FIG. 3 so that the liquid sample addition section 1 is located in the addition window 5, and then the sheet material 4 is bent along the chain line,
As shown in FIG. 4, the analyzer is completed by assembling into a triangular prism case having both ends opened.

In the analysis operation in the analyzer configured as described above, first, a liquid sample is added to the addition window 5. Then, the liquid sample permeates from the liquid sample addition section 1 in the reaction layer carrier, and the measurement is started. As the measurement in the reaction layer 2 proceeds, a negative or positive reaction result appears in the confirmation window 6.
After standing for a certain period of time or after confirming the sign of the completion of the reaction, the measurement result is confirmed and the result is determined.

At the time of adding a liquid sample, even if an excessive amount of the liquid sample is added and flows into the case, since the case is open at the end on the liquid sample adding section 1 side, an excess amount of the liquid sample is added thereto. Since the liquid sample flows out, no backflow or upward flow occurs, and reliable chromatography can be performed. Also, since the reaction layer carrier and the case are in close contact,
The liquid sample does not flow into the gap between the two. Further, as shown in the figure, if the liquid sample adding section 1 is made larger than the adding window 5 and the entire surface of the adding window 5 is closed by the liquid sample adding section 1, the space between the adding window and the reaction layer carrier is formed. No gap is formed, so that an excessive amount of liquid sample can be prevented from flowing into the case.

The processed shape of the sheet material 4 may be a cylindrical shape or a prismatic shape.
It may be transparent or opaque, and may be composed of a liquid-permeable or liquid-impermeable material. In addition to the qualitative immunoassay described above, a chromatographic analyzer using other measurement principles such as quantitative immunoassay can be similarly implemented.

[0023]

As described above, according to the present invention, not only the measurement accuracy can be improved by preventing the liquid sample from flowing back to the reaction portion, but also the advantageous effects such as a reduction in cost and an improvement in disposal can be obtained. .

[Brief description of the drawings]

FIG. 1 is a perspective view showing a chromatography material according to an embodiment of the present invention.

FIG. 2 is a plan view showing an analyzer according to one embodiment of the present invention.

FIG. 3 is a development view of a sheet material according to the embodiment of the present invention.

FIG. 4 is a perspective view of an analyzer according to one embodiment of the present invention.

[Explanation of symbols]

 1 Liquid sample addition section 2 Reaction layer 3 Water absorption section 4 Sheet material 5 Liquid sample addition window 6 Confirmation window

Claims (1)

[Claims] After the reaction layer carrier is adhered to the sheet material so that the liquid sample addition portion of the reaction layer carrier made of the chromatography material is positioned in the addition window of the liquid sample formed in the sheet material, at least the liquid is added. An analysis apparatus comprising: assembling the sheet material so as to form a hollow case having an open end on the side to which a sample is added.