CN-224216621-U - Sample test card and medical test equipment

Abstract

A sample test card and medical detection equipment relate to the field of analytical instruments. The sample test card (9) comprises a first channel (1), a second channel (2), a first electrode (41) located in the first channel (1) and a second electrode (42) located in the second channel (2). The first electrode (41) is configured for acquiring electrochemical parameters of a sample in the first channel (1), the second electrode (42) is configured for acquiring electrochemical parameters of a reference liquid in the second channel (2), the sample test card (9) further comprises a salt bridge (3), one end of the salt bridge (3) is exposed in the first channel (1), and the other end of the salt bridge (3) is exposed in the second channel (2). The sample test card (9) can utilize the salt bridge (3) to realize the conduction of the first electrode (41) and the second electrode (42), so that the accuracy of the electrochemical parameters of the measured sample is improved.

Inventors

• LI GUOXIA
• YAN BING
• LIU XIAOYING
• ZHANG XING
• SHI MINGLIAN

Assignees

• 深圳市理邦精密仪器股份有限公司

Dates

Publication Date

20260508

Application Date

20230731

Priority Date

20220731

Claims (20)

1. 1.A sample test card comprising: A first channel, a second channel, a first electrode located in the first channel, a second electrode located in the second channel; The first electrode is configured for acquiring electrochemical parameters of the sample in the first channel, and the second electrode is configured for acquiring electrochemical parameters of the reference liquid in the second channel; The sample test card further comprises a salt bridge, one end of the salt bridge is exposed in the first channel, and the other end of the salt bridge is exposed in the second channel; The sample test card further comprises: The first plate is provided with a first electrode and a second electrode, one end of the salt bridge is close to the first electrode, and the other end of the salt bridge is close to the second electrode; The first plate has inlet and liquid outlet, the sample test card still includes: A first valve, a second valve, a third valve; The liquid inlet is communicated with one end of the first channel, the other end of the first channel is provided with a first branch and a second branch, the first branch is communicated with the liquid outlet through the first valve, the second branch is communicated with one end of the second channel through the second valve, and the other end of the second channel is connected with the liquid outlet through the third valve.
2. 2. The sample test card of claim 1, wherein the sample test card comprises a sample card, The surface area of the portion of the salt bridge exposed in the first passage is smaller than the surface area of the portion of the salt bridge exposed in the second passage, or, The length of the portion of the salt bridge exposed in the first passage is less than the length of the portion of the salt bridge exposed in the second passage.
3. 3. The sample test card of claim 1, wherein the sample test card comprises a sample card, The salt bridge comprises a third channel, one end of the third channel is communicated with the first channel, the other end of the third channel is communicated with the second channel, the third channel is used for placing the salt bridge, and the salt bridge can expand to block the third channel after contacting liquid.
4. 4. The sample test card of claim 1, comprising: The second plate is provided with a first through hole and a second through hole, the second plate is arranged on one surface of the first plate, which is provided with the first electrode, one end of the salt bridge and the first electrode are exposed through the first through hole, and the other end of the salt bridge and the second electrode are exposed through the second through hole; The first shell and the first plate are matched and clamped to form the first channel corresponding to the first through hole and the second channel corresponding to the second through hole; Wherein, first plate, second plate and at least one of first casing is last to be seted up the recess, the recess is used for holding the salt bridge.
5. 5. The sample test card of claim 4, wherein the sample test card comprises a sample card, The groove is formed in the surface, facing one side of the first channel, of the first plate, the second plate at least covers the groove area of the first plate to form a third channel for accommodating the salt bridge, one end of the third channel is led to the first channel, the other end of the third channel is led to the second channel, and the salt bridge contact liquid can expand and block the third channel.
6. 6. The sample test card of claim 5, wherein the sample test card comprises a sample card, The inner wall of the second through hole, which is close to the first through hole, is provided with a first concave part, and the groove part is exposed in the second channel through the first concave part.
7. 7. The sample test card of claim 4, wherein the sample test card comprises a sample card, The first arched groove is formed in the position, opposite to the groove, of the surface, close to the salt bridge, of the side, where the first electrode is arranged, of the first plate, the first arched groove is formed in the position, opposite to the groove, of the second plate, and the salt bridge absorbs water and expands towards the second plate to fill the first arched groove.
8. 8. The sample test card of claim 4, wherein the sample test card comprises a sample card, The grooves are formed by arranging a plurality of partially overlapped round, quasi-round, elliptic, quasi-elliptic or polygonal pits, and the salt bridge is filled in each round, quasi-round, elliptic, quasi-elliptic or polygonal pit.
9. 9. The sample test card of claim 8, wherein the sample test card comprises a sample card, The pits are partially overlapped one by one in a direction parallel to a connecting line of the first electrode and the second electrode, thereby forming the grooves in series.
10. 10. The sample test card of claim 4, wherein the sample test card comprises a sample card, The first plate comprises a circuit board, the circuit board is arranged on one side close to the first channel and the second channel, and the salt bridge, the first electrode and the second electrode are arranged on the surface of one side, facing the first channel, of the circuit board.
11. 11. The sample test card of claim 1, wherein the sample test card comprises a sample card, The distance between the salt bridge and the first electrode is less than the distance between the salt bridge and the second electrode.
12. 12. The sample test card of claim 1, wherein the sample test card comprises a sample card, The impedance of the salt bridge ranges from 1kΩ to 1000kΩ.
13. 13. The sample test card of claim 1, wherein the sample test card comprises a sample card, The salt bridge is made of hydrogel, agar or silica gel.
14. 14. The sample test card of claim 4, wherein the sample test card comprises a sample card, The inner wall of the second through hole, which is close to the first through hole, is provided with a first concave part, and the groove part is exposed in the second channel through the first concave part.
15. 15. The sample test card of claim 6 or 14, wherein, The surface area of the portion of the salt bridge exposed in the first passage is smaller than the surface area of the portion of the salt bridge exposed in the second passage, or, The length of the portion of the salt bridge exposed in the first passage is less than the length of the portion of the salt bridge exposed in the second passage.
16. 16. The sample test card of claim 15, wherein the salt bridge is a solid state salt bridge.
17. 17. The sample test card of any one of claims 1 to 12, wherein the salt bridge is a solid state salt bridge.
18. 18. The sample test card of claim 7, wherein the salt bridge is a hydrogel, the first arcuate slot has a volume greater than the volume of the salt bridge that expands, and the first arcuate slot is configured to prevent the salt bridge from being deformed by compression after expansion.
19. 19. The sample test card of claim 8, wherein the salt bridge is a hydrogel containing electrolyte and the recess is filled by dispensing.
20. 20. The sample test card of claim 4, wherein the sample test card comprises a sample card, The grooves are formed by arranging a plurality of partially overlapped round, round-like, elliptic-like or polygonal pits.

Description

Sample test card and medical test equipment Technical Field The application relates to the field of analytical instruments, in particular to a sample test card. Background In order to detect biochemical samples, a plurality of electrodes can be arranged in the sample test card to detect the samples by using an electrochemical method, so that a conductive loop is formed between the electrodes in the test card to test the electrochemical parameters of the samples. At present, in such sample test cards, a permeable membrane is usually arranged between a reference cell provided with a reference electrode and a measurement channel provided with a measurement electrode, or a reference liquid in the reference cell is directly contacted with a sample in the measurement channel, so that the conduction of a circuit is realized. However, these methods can cause the components of the reference solution and the sample to be doped with each other, which is disadvantageous for the stability of the measurement environment, and thus can affect the accuracy of the measurement result. In addition, when the reference liquid is directly contacted with the sample for measurement, the liquid connection potential between the reference liquid and the sample can also influence the accuracy. Disclosure of Invention The application aims to provide a sample test card so as to improve the accuracy of measuring electrochemical parameters of a sample. The application provides a sample test card, which comprises a first channel, a second channel, a first electrode positioned in the first channel and a second electrode positioned in the second channel. The first electrode is configured to obtain electrochemical parameters of the sample in the first channel, the second electrode is configured to obtain electrochemical parameters of the reference liquid in the second channel, and the sample test card further comprises a salt bridge, one end of the salt bridge is exposed in the first channel, and the other end of the salt bridge is exposed in the second channel. Compared with the prior art, the application discloses a sample test card, which is characterized in that a salt bridge is arranged between a first channel filled with a sample and a second channel filled with a reference liquid, so that a first electrode and a second electrode in the two channels are conducted, a conducted loop is formed under the condition that liquids in the two channels are not in direct contact, the mutual doping and pollution of different liquids are effectively avoided, meanwhile, the influence of a liquid connection potential on an electrochemical parameter measurement result is effectively reduced by utilizing the characteristic of anion-cation migration rate in the salt bridge, the stability of the reference liquid and the sample can be ensured, and the accuracy of measuring the electrochemical parameters of the sample is improved. Drawings In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein: FIG. 1 is a schematic diagram of an assembled structure of an embodiment of a sample test card of the present application. Fig. 2 is a schematic diagram of an exploded structure of the sample test card of fig. 1. Fig. 3 is a schematic view of an assembled structure of the first plate and the second plate in fig. 1. Fig. 4 is a schematic view of the first plate member in fig. 1. Fig. 5 is a schematic view of an assembled structure of the first plate and the second plate in fig. 1 at another angle. Fig. 6 is an enlarged schematic view of the area a in fig. 5. FIG. 7 is a schematic view of the sample test card of FIG. 1 from another angle. Fig. 8 is a schematic cross-sectional view of fig. 3 taken along the direction C-C. Fig. 9 is a schematic diagram of the structure of fig. 8 with the area B enlarged. Detailed Description In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present application are shown in the drawings. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application. The terms "first," "sec