Electrochemical sensor based on solid ion exchange

Abstract

The utility model relates to the technical field of electrochemical detection sensors, in particular to an electrochemical sensor based on solid ion exchange. According to the technical scheme, the device comprises a shell, a micro-fluidic chip is fixedly installed on the inner wall of the bottom of the shell, a plurality of through openings are evenly formed in the top wall of the micro-fluidic chip, a solid ion exchange membrane is fixedly installed in the micro-fluidic chip, an electrode assembly is arranged on the solid ion exchange membrane, a top cover is connected to the top of the shell in a clamped mode, and the top cover is connected with the micro-fluidic chip in a clamped mode. And a regulating valve is fixedly inserted into the top cover, and a processing assembly is fixedly installed in a groove in the front face of the shell. According to the utility model, high-efficiency ion detection and signal processing can be realized, the sensor is suitable for various environments and application scenes, the functionality and the stability of the sensor are ensured by the design, and the practicability and the user friendliness are also considered.

Description

Technical Field

[0001] The utility model relates to the technical field of electrochemical detection sensors, in particular to an electrochemical sensor based on solid ion exchange. Background Art

[0002] With the development of electronic technology and detection technology, various types of sensors are being used more and more widely in various industries. Sensors based on electrochemical principles have been widely used in the detection of harmful gases in chemical, coal mining, environmental protection, health and other departments. Since electrochemical sensors can respond to a variety of harmful gases, and have a simple structure and low cost, they play an important role in the detection of harmful gases. Electrochemical sensors are made based on ionic conductivity.

[0003] In the prior art, patent number: CN215953439U discloses an electrochemical sensor based on solid ion exchange, which can improve the sealing effect of split electrochemical sensors. An electrochemical sensor based on solid ion exchange includes a shell, a bottom cover, a support sheet, and an electrode sheet. The shell is provided with a concave cavity, and the support sheet and the electrode sheet are arranged in parallel in the concave cavity. The bottom of the concave cavity is open and a bottom cover is arranged. The bottom cover and the shell are detachably connected. The electrode sheet, the support sheet and the bottom cover are arranged in sequence, and a sealing ring is arranged between the bottom cover and the shell. Arranging the support sheet and the electrode sheet in the concave cavity of the shell can make the structure more compact, and the sealing ring can improve the sealing effect of the bottom cover connection.

[0004] Although the above-mentioned solid ion exchange electrochemical sensor can achieve the detection effect through the arrangement of electrode sheets and support sheets, it still has the following shortcomings in practical applications: the use of a single electrode sheet for electrochemical reaction leads to low detection effect and efficiency and poor practicality. Utility Model Content

[0005] The utility model aims to solve the problems existing in the background technology and propose an electrochemical sensor based on solid ion exchange.

[0006] To achieve this purpose, the utility model adopts the following technical scheme: an electrochemical sensor based on solid ion exchange, comprising a shell, a microfluidic chip is fixedly installed on the bottom inner wall of the shell, a plurality of through holes are evenly opened on the top wall of the microfluidic chip, a solid ion exchange membrane is fixedly installed inside the microfluidic chip, an electrode assembly is arranged on the solid ion exchange membrane, a top cover is clamped on the top of the shell, a regulating valve is fixedly plugged on the top cover, and a processing assembly is fixedly installed in the front groove of the shell.

[0007] Preferably, the electrode assembly comprises a reference electrode and a working electrode which are respectively fixedly mounted on the upper and lower sides of the solid ion exchange membrane, and an auxiliary electrode is fixedly mounted on the bottom of the working electrode.

[0008] Preferably, the working electrode, the reference electrode and the auxiliary electrode are all electrically connected to the processing component.

[0009] Preferably, the working electrode, reference electrode and auxiliary electrode are all made of nanomaterials or conductive polymer materials.

[0010] Preferably, the processing component includes a signal processor and a display.

[0011] Preferably, a sealing strip is detachably mounted on the bottom of the top cover, a sealing groove is provided on the top of the shell, and the sealing strip cooperates with the sealing groove.

[0012] Preferably, the solid ion exchange membrane is made of functionalized polymer or composite material.

[0013] The beneficial effects of the utility model are as follows: the sample enters the shell through the regulating valve and flows into the microfluidic chip. The sample inflow speed can be controlled by the regulating valve. After entering the shell, the sample enters the microfluidic chip through multiple ports. When the sample containing target ions passes through the solid ion exchange membrane, the membrane selectively captures the target ions and allows other components to pass through. The captured ions undergo electrochemical reactions on the working electrode. The reference electrode provides a stable reference potential to ensure the stability of the reaction potential on the working electrode. The auxiliary electrode helps complete the circuit to ensure the continuous flow of current. The current signal is captured by the processing component, amplified and digitally processed and displayed to the user, so that the device can achieve efficient ion detection and signal processing, and is suitable for a variety of environments and application scenarios. This design not only ensures the functionality and stability of the sensor, but also takes into account practicality and user-friendliness. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a front view schematic diagram of the overall structure of an embodiment of an electrochemical sensor based on solid ion exchange of the utility model;

[0015] Figure 2 It is a front cutaway schematic diagram of the overall structure of an electrochemical sensor embodiment based on solid ion exchange of the utility model;

[0016] Figure 3 The utility model is an exploded schematic diagram of the overall structure of an electrochemical sensor embodiment based on solid ion exchange.

[0017] Figure numerals: 1. Shell; 11. Sealing groove; 2. Microfluidic chip; 21. Through port; 3. Solid ion exchange membrane; 4. Electrode assembly; 41. Working electrode; 42. Reference electrode; 43. Auxiliary electrode; 5. Top cover; 51. Sealing strip; 6. Regulating valve; 7. Processing assembly. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0019] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0021] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning. Embodiment 1

[0022] like Figure 1-3 As shown, the utility model proposes an electrochemical sensor based on solid ion exchange, comprising a shell 1, a microfluidic chip 2 is fixedly mounted on the bottom inner wall of the shell 1, a plurality of through openings 21 are evenly opened on the top wall of the microfluidic chip 2, a solid ion exchange membrane 3 is fixedly mounted inside the microfluidic chip 2, an electrode assembly 4 is arranged on the solid ion exchange membrane 3, a top cover 5 is clamped on the top of the shell 1, a regulating valve 6 is fixedly plugged on the top cover 5, and a processing assembly 7 is fixedly mounted in the front groove of the shell 1.

[0023] In this embodiment: the electrode assembly 4 includes a reference electrode 42 and a working electrode 41 fixedly mounted on the upper and lower sides of the solid ion exchange membrane 3 respectively, and an auxiliary electrode 43 is fixedly mounted on the bottom of the working electrode 41. Through this arrangement, the target ions react electrochemically with the working electrode 41 here. The main function of the reference electrode 42 is to provide a stable reference potential to help control the electrochemical reaction on the working electrode 41. The function of the auxiliary electrode 43 is to complete the circuit, ensure the continuous flow of current, and help maintain the charge balance of the entire system; the working electrode 41, the reference electrode 42 and the auxiliary electrode 43 are all electrically connected to the processing component 7. Through this arrangement, the signal can be transmitted to the processing component 7; the working electrode 41, the reference electrode 42 and the auxiliary electrode 43 are all made of nanomaterials or conductive polymer materials. Through this arrangement, the nanomaterials have a large specific surface area and special electrochemical properties, which can enhance the electrochemical activity of the electrode and improve the sensitivity and response speed of the sensor. Embodiment 2

[0024] like Figure 1-3 As shown, the utility model proposes an electrochemical sensor based on solid ion exchange. Compared with the first embodiment, this embodiment also includes that the processing component 7 includes a signal processor and a display. Through this arrangement, it is convenient for the user to directly observe the detection data; the bottom of the top cover 5 is detachably installed with a sealing strip 51, and the top of the shell 1 is provided with a sealing groove 11, and the sealing strip 51 cooperates with the sealing groove 11. Through this arrangement, the sealing performance inside the device is increased, thereby enhancing the detection effect; the solid ion exchange membrane 3 is made of functionalized polymers or composite materials. Through this arrangement, the stability and durability of the sensor can be improved, so that it can operate stably for a long time under different environmental conditions.

[0025] Working principle: The sample enters the housing 1 through the regulating valve 6 and flows into the microfluidic chip 2. The sample inflow speed can be controlled by the regulating valve 6. After entering the housing 1, the sample enters the microfluidic chip 2 through multiple ports 21. When the sample containing target ions passes through the solid ion exchange membrane 3, the membrane will selectively capture the target ions and allow other components to pass through. The captured ions undergo electrochemical reactions on the working electrode 41. The reference electrode 42 provides a stable reference potential to ensure the stability of the reaction potential on the working electrode 41. The auxiliary electrode 43 helps complete the circuit to ensure the continuous flow of current. The current signal is captured by the processing component 7 and displayed to the user after amplification and digital processing.

[0026] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. An electrochemical sensor based on solid ion exchange, comprising a housing (1), characterized in that: A microfluidic chip (2) is fixedly mounted on the bottom inner wall of the housing (1); a plurality of openings (21) are evenly provided on the top wall of the microfluidic chip (2); a solid ion exchange membrane (3) is fixedly mounted inside the microfluidic chip (2); an electrode assembly (4) is arranged on the solid ion exchange membrane (3); a top cover (5) is clamped on the top of the housing (1); a regulating valve (6) is fixedly plugged into the top cover (5); and a processing assembly (7) is fixedly mounted in a groove on the front side of the housing (1).

2. An electrochemical sensor based on solid ion exchange according to claim 1, characterized in that: The electrode assembly (4) comprises a reference electrode (42) and a working electrode (41) which are respectively fixedly mounted on the upper and lower sides of the solid ion exchange membrane (3); an auxiliary electrode (43) is fixedly mounted on the bottom of the working electrode (41).

3. An electrochemical sensor based on solid ion exchange according to claim 2, characterized in that: The working electrode (41), the reference electrode (42) and the auxiliary electrode (43) are all electrically connected to the processing component (7).

4. The electrochemical sensor based on solid ion exchange according to claim 2, characterized in that: The working electrode (41), the reference electrode (42) and the auxiliary electrode (43) are all made of nanomaterials or conductive polymer materials.

5. The electrochemical sensor based on solid ion exchange according to claim 1, characterized in that: The processing component (7) includes a signal processor and a display.

6. The electrochemical sensor based on solid ion exchange according to claim 1, characterized in that: A sealing strip (51) is detachably mounted on the bottom of the top cover (5), a sealing groove (11) is provided on the top of the housing (1), and the sealing strip (51) matches the sealing groove (11).

7. The electrochemical sensor based on solid ion exchange according to claim 1, characterized in that: The solid ion exchange membrane (3) is made of a functionalized polymer or a composite material.

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