Electrochemical test strip containing coding electrode

Abstract

Disclosed in the present application is an electrochemical test strip containing a coding electrode. The electrochemical test strip comprises a substrate, and a coding electrode and a detection electrode which are provided on the substrate, wherein the coding electrode and the detection electrode are located on the same side of the substrate, and the coding electrode comprises at least three first electrode blocks and connection lines each configured to electrically connect two adjacent first electrode blocks among the at least three first electrode blocks; and a second electrode block is provided at the end of an extension line of each electrode of the detection electrode, which end is close to the coding electrode, and the coding electrode is electrically connected to the detection electrode. The electrochemical test strip in the present application fully utilizes the detection electrode while providing a large amount of code information, so that production procedures are reduced, production resources are saved, and production process difficulties are also reduced, thereby facilitating the mass production of test strips. The electrochemical test strip in the present application has a good application prospect.

Description

An electrochemical test paper containing coded electrodes

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese Patent Application No. 2024217891303, filed on July 26, 2024, entitled “An Electrochemical Test Paper Containing a Coded Electrode,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application belongs to the field of biosensing technology, specifically relating to an electrochemical test paper containing a coding electrode. Background Technology

[0004] Electrochemical biosensors have been widely used in point-of-care testing (POCT) for rapid diagnosis. These biosensors use an insulating substrate (PET substrate) as a carrier, printing biosensor electrodes onto it. An enzyme solution is then added to the reaction area of ​​the substrate. The electrochemical oxidation-reduction reaction between the enzyme and the target analyte generates an electric current, which is used to detect the analyte by measuring the current strength. Examples include blood glucose and ketone test strips for the auxiliary diagnosis and treatment of diabetes, and uric acid test strips for the diagnosis and treatment of gout and ketosis. However, these biosensors are susceptible to variations in manufacturing processes, batch-to-batch variations in raw materials, and the production environment, leading to discrepancies in test results between different batches. To minimize these discrepancies, parameter calibration is required for each batch of test strips before use.

[0005] The shortcomings of existing electrochemical test strips with coded electrodes are twofold: first, placing the coded electrode and the detection electrode on opposite sides of the substrate increases the complexity and difficulty of the manufacturing process; second, when a large amount of calibration information needs to be pre-stored, multiple electrode points are added to the sensor to store the information, which takes up space and increases the production process and manufacturing cost. At the same time, the corresponding detection instrument also needs to add corresponding contacts, further increasing the cost of the product.

[0006] Application content

[0007] To address the above issues, the purpose of this application is to provide an electrochemical test strip containing a coding electrode. This test strip places the detection electrode and the coding electrode on the same side of the substrate, and can store more coding information by having the coding electrode work independently or be electrically connected to the detection electrode.

[0008] To achieve the above objectives, this application adopts the following technical solution:

[0009] This application provides an electrochemical test strip including a coding electrode, comprising a substrate, a coding electrode disposed on the substrate, and a detection electrode, wherein the coding electrode and the detection electrode are located on the same side of the substrate, wherein...

[0010] The coding electrode includes at least three first electrode blocks and a connecting line configured to electrically connect two adjacent first electrode blocks among the at least three first electrode blocks;

[0011] The detection electrode is electrically connected to the encoding electrode.

[0012] In one alternative implementation, the number of the first electrode blocks of the coding electrode does not exceed eight.

[0013] In one optional implementation, the encoding electrode is located below the detection electrode, and the first electrode block of the encoding electrode is set as a rectangle and arranged in a row.

[0014] In one optional implementation, the detection electrode includes a target detection working electrode and a target detection counter electrode, the target detection working electrode and the target detection counter electrode forming a target detection circuit, the encoding electrode and the detection electrode being on the same horizontal plane, and a connecting line being provided between them for electrical connection.

[0015] In one optional implementation, the target detection electrode includes a second electrode block, and any one of the first electrode blocks of the encoding electrode is electrically connected to the second electrode block of the target detection electrode.

[0016] In one optional embodiment, the detection electrode further includes an impedance detection working electrode, an impedance detection counter electrode, and a sample injection detection electrode, wherein the impedance detection working electrode and the impedance detection counter electrode constitute an impedance detection circuit, and the sample injection detection electrode and the target analyte detection working electrode constitute a sample injection detection circuit.

[0017] In one optional implementation, the target detection electrode, the impedance detection electrode, and the sample injection detection electrode each include a second electrode block, and at least one first electrode block of the coding electrode is electrically connected to at least one second electrode block in a one-to-one manner.

[0018] In one optional implementation, the first electrode block of the encoding electrode and the second electrode block of the detection electrode are both combinations of one or more of carbon electrodes, silver electrodes, and gold electrodes.

[0019] In one optional implementation, the connecting wire is made of one or more of carbon, silver, gold, platinum, and palladium, and a break is provided on the connecting wire.

[0020] Compared with the prior art, this application has the following beneficial effects:

[0021] (1) In this application, the coding electrode and the detection electrode are printed on the same side of the substrate and on the same horizontal plane. While retaining the coding information, the production process is simplified. Compared with the coding electrode printed on the reverse side, printing the detection electrode on the same side can save the time required for one printing process and avoid the production process difficulties faced by printing on both sides, which is conducive to the mass production of test strips.

[0022] (2) When it is necessary to increase the amount of encoded information, in addition to increasing the number of first electrode blocks of the encoding electrode, this application can also connect to the detection electrode, thereby making full use of the detection electrode, reducing the number of additional electrode blocks, thereby saving production resources and printing time, and saving production costs.

[0023] (3) The number of first electrode blocks of the coding electrode in this application can be flexibly adjusted according to the required amount of coding information. The detection equipment only needs a few corresponding contacts to realize the identification of coding information, which avoids the waste of production resources and further reduces production costs. Attached Figure Description

[0024] Figure 1 is a schematic diagram of the structure of an electrochemical test paper containing a coding electrode, as shown in an embodiment of this application;

[0025] Figure 2 is a schematic diagram of the structure of an electrochemical test paper containing a coding electrode, as shown in an embodiment of this application;

[0026] Figure 3 is a schematic diagram of the structure of the encoding electrode shown in an embodiment of this application;

[0027] Figure 4 is a schematic diagram of the structure of the encoding electrode shown in an embodiment of this application;

[0028] Figure 5 is a schematic diagram of the structure of the encoding electrode shown in an embodiment of this application;

[0029] Figure 6 is a schematic diagram of the connection between an encoding electrode and a detection electrode according to an embodiment of this application;

[0030] Figure 7 is a schematic diagram of another connection between the encoding electrode and the detection electrode according to an embodiment of this application;

[0031] Figure 8 is a schematic diagram of the structure of the encoding electrode shown in an embodiment of this application;

[0032] Figure 9 is a schematic diagram of an encoding electrode structure for automatic encoding according to an embodiment of this application.

[0033] In the figure: 1. Substrate; 2. Detection electrode; 21. Second electrode block; 22. Target detection working electrode; 23. Target detection counter electrode; 24. Impedance detection working electrode; 25. Impedance detection counter electrode; 26. Sample injection detection electrode; 3. Encoding electrode; 31. First electrode block; 32. Connecting line. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0035] In the description of this application, it should be understood that the terms "upper," "lower," "front," "rear," "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application; relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0036] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an integral connection, or a detachable connection; they can refer to the internal connection of two components; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0037] As shown in Figure 1, this embodiment discloses the structure of an electrochemical test paper containing an encoding electrode, including a substrate 1, an encoding electrode 3 disposed on the substrate 1, and a detection electrode 2, wherein the encoding electrode 3 and the detection electrode 2 are located on the same side of the substrate 1 and are on the same horizontal plane.

[0038] Specifically, the substrate 1 is configured as a printed coding electrode 3 and a detection electrode 2, which are insulating and can be made of materials such as glass fiber (FR-4), polyethylene terephthalate (PET), polyvinyl chloride (PVC) or polypropylene (PP).

[0039] As shown in Figure 2, the detection electrode 2 includes a target analyte detection working electrode 22 and a target analyte detection counter electrode 23, which together constitute a target analyte detection circuit. A bioactive substance reaction layer, such as an enzyme layer, covers the surface of the detection electrode 2. The concentration of the target analyte is determined by the electrochemical reaction between the bioactive substance and the target analyte, which generates a current signal. In this embodiment, the detection electrode 2 also includes an impedance detection working electrode 24, an impedance detection counter electrode 25, and a sample injection detection electrode 26. The impedance detection working electrode 24 and the impedance detection counter electrode 25 constitute an impedance detection circuit, which can calibrate the test values ​​of hematocrit in different samples, making the test results more accurate. The sample injection detection electrode 26 and the target analyte detection working electrode 22 constitute a sample injection detection circuit, configured to determine whether the sample of the target analyte is sufficient. Optionally, the detection electrode 2 can be one or a combination of carbon electrodes, silver electrodes, and gold electrodes.

[0040] Optionally, as shown in Figure 1, the encoding electrode 3 is located below the detection electrode 2. It includes multiple identical first electrode blocks 31 and connecting lines 32 configured to conductively connect adjacent first electrode blocks 31. The encoding electrode 3 is configured to provide various encoding information. It can obtain different electrical parameters through independent operation. After being identified by the detection device, the corresponding encoding information is determined, and the detection device provides corresponding correction parameters to make the detection results more accurate. It should be noted that the electrical parameters can be the connection or disconnection between two adjacent first electrode blocks 31; the electrical parameters can also be the current intensity relationship obtained after applying voltage between two adjacent first electrode blocks 31. It should be understood that the disconnection between the first electrode blocks 31 includes not providing a connecting line 32 between two adjacent first electrode blocks 31, or the provided connecting line 32 being cut off, with a break point provided on the connecting line 32, which can be cut off by laser cutting or mechanical scribing.

[0041] In this embodiment, there are 5 first electrode blocks 31. The number of first electrode blocks 31 can be increased to increase the coding information. Therefore, the number of first electrode blocks 31 can be flexibly adjusted as needed, and can be selected as 3-8. If there are less than 3, the amount of coding information provided is too small; if there are more than 8, the electrode blocks will be arranged too tightly due to the limited space of the test strip, which increases the difficulty of laser or mechanical cutting of the connecting line 32 and easily leads to inaccurate coding information.

[0042] To obtain more encoded information, in addition to increasing the number of first electrode blocks 31, the encoding electrode 3 can also be electrically connected to the detection electrode 2. As shown in Figure 1, each electrode of the detection electrode 2 forms a second electrode block 21 near the end of the extension line of the encoding electrode 3. The first electrode block 31 and the second electrode block 21 are electrically connected through a connecting line 32, thereby obtaining more electrical parameters. It should be understood that any one of the first electrode blocks 31 of the encoding electrode 3 can be electrically connected to the second electrode block 21 of one of the electrodes of the detection electrode 2, or multiple first electrode blocks 31 of the encoding electrode 3 can be connected one-to-one with the same number of multiple second electrode blocks 21 of the detection electrode 2. It should be noted that the electrode corresponding to the second electrode block 21 connected to the encoding electrode 3 cannot be an electrode that requires a voltage difference. In this embodiment, the second electrode blocks 211 and 212 do not participate in the connection with the first electrode blocks 31, because the electrodes connected to these two electrode blocks are the target detection working electrode 22 and the impedance detection working electrode 24 in the detection electrode 2, respectively, which require a voltage difference in actual operation.

[0043] It is worth noting that in this embodiment, the first electrode block 31 and the second electrode block 21 are arranged in a row, and the shape of the electrode block is rectangular. It can also be other shapes and sizes in the prior art, without particular limitation. Optionally, the first electrode block 31 and the second electrode block 21 are made of one or more of carbon electrodes, silver electrodes and gold electrodes, and the connecting wire 32 is made of one or more of carbon, silver, gold, platinum and palladium, and can be silver.

[0044] It's important to understand that when the obtained electrical parameters represent the connection or disconnection between electrode blocks, the principle behind the encoding information is as follows: Since a connection line 32 can be set between every two adjacent electrode blocks, there are a total of n-1 connection lines 32 between n electrode blocks. Based on these connection lines 32, adjacent electrode blocks can either be made conductive or disconnected by cutting the breakpoints on the connection line 32 using laser or mechanical methods. Therefore, each connection line 32 has two states, and the n-1 connection lines 32 can form two... n-1 Encoded information.

[0045] Taking this embodiment as an example, as shown in Figure 1, there are five first electrode blocks, labeled as first electrode block 311, first electrode block 312, first electrode block 313, first electrode block 314, and first electrode block 315, respectively. There are also five second electrode blocks 21, labeled as second electrode block 211, second electrode block 212, second electrode block 213, second electrode block 214, and second electrode block 215, respectively. In this embodiment, each pair of adjacent first electrode blocks 31 is connected by a connecting line 32, and the first electrode block 313 and the second electrode block 213 are also connected by a connecting line 32. Therefore, there are a total of five connecting lines 32, which can form two... 5 =32 types of coded information. Six contacts are set at corresponding positions on the detection device, each corresponding to the first electrode block 31 and the second electrode block 21. When the biosensor test strip is inserted into the detection device, the six contacts connect to five of the first electrode blocks 31 and the second electrode blocks 213. By determining whether there is a conductive connection between any two adjacent electrode blocks in the first electrode block 31, and whether there is a conductive connection between the first electrode block 313 and the second electrode block 213, the corresponding coded information (i.e., code) can be determined. The detection device then calls the correction parameters matching the code for correction, ensuring the accuracy of subsequent detection results.

[0046] When the obtained electrical parameter is the current intensity relationship between adjacent electrode blocks, the principle of forming the encoded information is as follows: Taking this embodiment as an example, as shown in FIG. 1, there are 5 first electrode blocks 31, namely the first electrode block 311, the first electrode block 312, the first electrode block 313, the first electrode block 314, and the first electrode block 315, and there are also 5 second electrode blocks 21, namely the second electrode block 211, the second electrode block 212, the second electrode block 213, the second electrode block 214, and the second electrode block 215. In this embodiment, every two adjacent first electrode blocks 31 are connected by a connecting wire 32, and the first electrode block 313 and the second electrode block 213 are connected by a connecting wire 32. And at the corresponding positions of the detection device, there are 6 contacts respectively corresponding to and cooperating with the 5 first electrode blocks 31 and the second electrode block 213. When the biosensor test strip is inserted into the detection device, the 6 contacts are respectively connected to the 5 first electrode blocks 31 and the second electrode block 213 to form an electrical circuit. The detection device is controlled to apply voltages to every two adjacent first electrode blocks 31 and between the first electrode block 313 and the second electrode block 213 in sequence based on the order of the voltage values from small to large or from large to small. Based on the fact that the resistances of the connecting wires 32 between the electrode blocks are basically the same, different current intensities between every two adjacent electrode blocks can be obtained. Based on the differences in their current intensities, the corresponding encoded information can be determined. For example, when the voltage value is applied from small to large, the current intensity I1 between the first electrode block 311 and the first electrode block 312 is less than the current intensity I2 between the first electrode block 312 and the first electrode block 313, and I2 is less than the current intensity I3 between the first electrode block 313 and the first electrode block 314, and I3 is less than the current intensity I4 between the first electrode block 314 and the first electrode block 315, and I4 is less than the current intensity I5 between the first electrode block 313 and the second electrode block 213 (i.e., I1 < I2 < I3 < I4 < I5), it can be recorded as code1. It should be understood that when the connecting wire 32 between two adjacent electrode blocks is cut off, the resistance between them will be infinitely large, and the current intensity will be infinitely small, so as to change the relationship of the current intensity and obtain more encoded information.

[0047] FIG. 3 discloses a structural schematic diagram of an encoded electrode. In this embodiment, the encoded electrode 3 works independently. The number of its first electrode blocks 31 is 3, arranged in a row, and there are 2 connecting wires 32 that can be cut in the middle. When the on / off of adjacent electrode blocks is used as the electrical parameter, the structure of this encoded electrode 3 can provide various encoded information. For example, the connection and disconnection between the first electrode block 311 and the first electrode block 312 can generate two kinds of encoded information. Similarly, the on / off between the first electrode block 312 and the first electrode block 313 can also form two kinds of encoded information. Therefore, when the number of the first electrode blocks 31 of the encoded electrode 3 is 3, a total of 2 2 = 4 kinds of encoded electrode information can be formed.

[0048] As the number of first electrode blocks 31 of the encoding electrode 3 increases, the number of ways to cut the connecting lines 32 also increases, and the amount of encoded information also increases. As shown in Figure 4, in this embodiment, there are 4 first electrode blocks 31, with 3 connecting lines 32 that can be cut in the middle, resulting in a total of 2 encoded information. 3 =8 types.

[0049] As the number of first electrode blocks 31 of the encoding electrode 3 increases, the number of ways to cut the connecting lines 32 also increases, and the amount of encoded information also increases. As shown in Figure 5, in this embodiment, there are 5 first electrode blocks 31, with 4 connecting lines 32 that can be cut in the middle, resulting in a total of 2 encoded information. 4 = 16 types.

[0050] It should be noted that, in addition to increasing the number of first electrode blocks 31, the encoding information can also be added by connecting the encoding electrode 3 and the detection electrode 2 via connecting lines 32. As shown in Figure 1, after the first electrode block 313 and the second electrode block 213 are connected, there are a total of 5 connect lines 32 that can be cut, and the encoding information is increased from the previous 2 4 =Increased from 16 to 2 5 =32 types. Multiple first electrode blocks 31 can also be connected to multiple second electrode blocks 21, while the second electrode block 21 corresponding to the electrode requiring a voltage difference is not involved in the connection, as shown in Figure 6. In this embodiment, second electrode blocks 211 and 212 are not involved in the connection, and first electrode blocks 313 and 315 are connected to second electrode blocks 213 and 215 one by one. In this case, there are a total of 6 connectable lines 32 that can be cut, increasing the encoding information to 2. 6 =64 types; As shown in Figure 7, the first electrode blocks 313, 314, and 315 are connected one by one to the second electrode blocks 213, 214, and 215, respectively. At this time, there are a total of 7 connect lines 32 that can be cut, and the encoding information increases to 2. 7 = 128 types. It is worth noting that the connection method and quantity can be flexibly selected according to the required encoding information. The position and method of connecting the encoding electrode 3 and the detection electrode 2 are not fixed; it can be that the first electrode block 313 is connected to the second electrode block 213, or the second electrode block 213 is connected to the first electrode block 314. Furthermore, the above connection method also applies when the number of first electrode blocks configured for encoding is 3, 4, 6, 7, or 8, but no further schematic diagram is provided here.

[0051] When the number of first electrode blocks 31 of encoding electrode 3 is 6, as shown in Figure 8, in this embodiment, the number of cut connecting lines 32 is 5, and the total number of encoded information formed is: 2. 5 = 32 types.

[0052] When the number of first electrode blocks 31 of the encoding electrode 3 is further increased, such as to 7 or 8, the amount of encoded information that can be formed will further increase. No schematic diagram is provided here for further explanation. When the number of first electrode blocks 31 of the encoding electrode 3 is 7, there are 6 connectable lines 32 that can be cut, and the total number of encoded information formed is: 2. 6 =64 types. When the number of first electrode blocks 31 of the encoding electrode 3 is 8, there are 7 connectable lines 32 that can be cut, resulting in a total of 2 possible encoded information. 7 = 128 types. Considering the actual width of the electrochemical test paper, the number of the first electrode blocks 31 of the coded electrode 3 is 7 or 8, which will be less in actual use, but it is still within the scope of protection of this patent.

[0053] This embodiment discloses a specific method for implementing various encoded information using the encoded electrode structure shown in Embodiment 2. It should be noted that the encoded information in this embodiment is achieved by controlling the connection or disconnection between adjacent first electrode blocks 31 through cutting the connecting lines 32. As shown in Figure 9, when the connecting lines 32 between first electrode blocks 311 and 312, and between first electrode blocks 312 and 313, are not cut, the resulting encoded information is Code 1. When the connecting line 32 between first electrode blocks 311 and 312 is cut, but the connecting line 32 between first electrode blocks 312 and 313 is not cut, the resulting encoded information is Code 2. When the connecting line 32 between first electrode blocks 311 and 312 is not cut, but the connecting line 32 between first electrode blocks 312 and 313 is cut, the resulting encoded information is Code 3. When the connection line between the first electrode block 311 and the first electrode block 312 is cut off and the connection line 32 between the first electrode block 312 and the first electrode block 313 is also cut off, the resulting encoding information is Code 4.

[0054] The connecting wires 32 between the electrode blocks can be cut by laser or mechanical means, and there are various ways to cut them.

[0055] Similarly, when the number of first electrode blocks 31 is 4-8, or when the first electrode block 31 and the second electrode block 21 are connected by connecting line 32, the way they obtain electrical parameters to form coded information by switching on and off is also as shown in Figure 6. The difference is that the information of the coded electrode 3 is richer, and the number of electrode blocks can be flexibly increased according to actual needs. Industrial applicability

[0056] Printing the encoding electrode 3 and the detection electrode 2 on the same side of the substrate 1 and on the same horizontal plane simplifies the production process while retaining the encoding information. Compared with printing the encoding electrode on the reverse side, printing it on the same side as the detection electrode 2 can save the time required for one printing process and avoid the production process difficulties faced by printing on both sides, which is conducive to the mass production of test strips.

Claims

1. An electrochemical test paper comprising a code electrode, comprising a substrate (1), a code electrode (3) and a detection electrode (2) provided on the substrate (1), characterized in that, The coding electrode (3) and the detection electrode (2) are located on the same side of the substrate (1), wherein the coding electrode (3) comprises at least three first electrode blocks (31) and a connecting line (32) configured to electrically connect adjacent two first electrode blocks (31) in the at least three first electrode blocks (31); the detection electrode (2) is electrically connected with the coding electrode (3).

2. The electrochemical test strip of claim 1, wherein, The number of the first electrode blocks (31) of the coding electrode (3) is not more than eight.

3. The electrochemical test strip of claim 2, wherein, The coding electrode (3) is located below the detection electrode (2), the first electrode blocks (31) of the coding electrode (3) are arranged in a rectangle, and the first electrode blocks (31) of the coding electrode (3) are arranged in a row.

4. The electrochemical test strip of claim 1, wherein, The detection electrode (2) comprises a target detection working electrode (22) and a target detection counter electrode (23), the target detection working electrode (22) and the target detection counter electrode (23) form a target detection loop, the coding electrode (3) and the detection electrode (2) are in the same horizontal plane, and a connecting line (32) is arranged between the coding electrode (3) and the detection electrode (2) to electrically connect them.

5. The electrochemical test strip of claim 4, wherein, The target detection counter electrode (23) comprises a second electrode block (21), and any first electrode block (31) of the coding electrode (3) is electrically connected with the second electrode block (21) of the target detection counter electrode (23).

6. The electrochemical test strip of claim 4, wherein, The detection electrode (2) further comprises an impedance detection working electrode (24), an impedance detection counter electrode (25), and a sample injection detection electrode (26), the impedance detection working electrode (24) and the impedance detection counter electrode (25) form an impedance detection loop, and the sample injection detection electrode (26) and the target detection working electrode (22) form a sample injection detection loop.

7. The electrochemical test strip of claim 6, wherein, The target detection counter electrode (23), the impedance detection counter electrode (25), and the sample injection detection electrode (26) each comprise a second electrode block (21), and at least one first electrode block (31) of the coding electrode (3) is electrically connected with at least one second electrode block (21) in one-to-one manner.

8. The electrochemical test strip of claim 5 or 7, wherein, The first electrode blocks (31) of the coding electrode (3) and the second electrode blocks (21) of the detection electrode (2) are one or a combination of carbon electrode, silver electrode, and gold electrode.

9. The electrochemical test strip of claim 1 or 4, wherein, The connecting line (32) is made of one or a combination of carbon, silver, gold, platinum, and palladium, and a breakpoint is arranged on the connecting line (32).

10. The electrochemical test strip of claim 1, wherein, The number of the first electrode blocks (31) is n, and the number of the connection lines (32) is n-1. The n-1 connection lines (32) are configured to form 2 n-1 coding information.

11. The electrochemical test strip of claim 10, wherein, The number of the first electrode blocks (31) is 3, the number of the connecting lines (32) is 2, and the two connecting lines (32) are configured to form four kinds of coding information.

12. The electrochemical test strip of claim 10, wherein, The number of the first electrode blocks (31) is 4, the number of the connecting lines (32) is 3, and the two connecting lines (32) are configured to form eight kinds of coding information.

13. The electrochemical test strip of claim 10, wherein, The number of the first electrode blocks (31) is 5, the number of the connecting lines (32) is 4, and the two connecting lines (32) are configured to form sixteen kinds of coding information.

14. The electrochemical test strip of claim 10, wherein, The number of the first electrode blocks (31) is 6, the number of the connection lines (32) is 5, and two of the connection lines (32) are configured to form 32 kinds of coded information.

15. The electrochemical test strip of claim 10, wherein, The number of the first electrode blocks (31) is 7, the number of the connection lines (32) is 6, and two of the connection lines (32) are configured to form 64 kinds of coded information.

Images