Interdigitated electrode-based redox-based ion detection method and sensor

Abstract

The application provides a kind of based on interdigital electrode redox ion detection method and sensor, above-mentioned method includes: control power supply is applied on interdigital electrode first voltage value of first time period of preset positive voltage, make redox ion in liquid to be detected near first electrode enrichment;Wherein, in first electrode applies positive voltage, and in second electrode applies negative voltage, forms positive voltage;Control power supply is applied on interdigital electrode second voltage value of second time period of preset reverse voltage, makes redox ion after being reduced after enrichment in first electrode near and generates output current;According to the output current, determine the concentration of redox ion in liquid to be detected.The technology improves the concentration of redox ion during detection by the method of first enrichment and then detection of redox ion, improves detection precision.

Description

Technical Field

[0001] The present invention relates to the field of sensing technology, and in particular to a redox ion detection method and sensor based on interdigital electrodes. Background Art

[0002] The detection of pollutants in water is a technical means to avoid pollution damage incidents. At present, the existing electrochemical detection sensors are widely used in the field of water environment detection due to their advantages such as high sensitivity, fast response speed and simple detection process. Here, the accuracy of trace pollutant detection is a hot topic of concern for relevant researchers. Furthermore, in order to achieve high-precision detection of low-range pollutants, the existing electrochemical detection sensors are required to have high sensitivity characteristics. At present, the existing technology uses materials with high electrocatalytic activity, micro-nano clusters or columns or particle structures to modify the electrode surface, giving the electrochemical detection sensor a higher detection ability, thereby achieving low-range and high-sensitivity detection of pollutants. However, this method has obvious shortcomings. The surface-modified sensitive materials and micro-nano structures are easily destroyed, and the practicality of the sensor is questionable. Summary of the Invention

[0003] The object of the present invention is to provide a redox ion detection method and sensor based on interdigital electrodes to improve the detection sensitivity of redox ions in a liquid to be detected.

[0004] In the first aspect, an embodiment of the present invention provides a method for detecting redox ions based on interdigital electrodes, which is applied to a controller; the controller is connected to interdigital electrodes with a preset spacing; the interdigital electrodes are placed in a liquid to be detected; the interdigital electrodes are connected to an external power supply; the interdigital electrodes include: a first electrode and a second electrode; the method includes: controlling the power supply to apply a forward voltage of a first voltage value of a preset first time period on the interdigital electrodes, so that the redox ions in the liquid to be detected are enriched near the first electrode; wherein a positive voltage is applied to the first electrode, and a negative voltage is applied to the second electrode to form the forward voltage; controlling the power supply to apply a reverse voltage of a second voltage value of a preset second time period on the interdigital electrodes, so that the redox ions enriched near the first electrode are reduced to generate an output current; and determining the concentration of the redox ions in the liquid to be detected based on the output current.

[0005] In an optional embodiment, the preset spacing is 100um; the width of the interdigital electrode is 100um; the length of the interdigital electrode is 4mm; the number of the interdigital electrodes is 10; the thickness of the interdigital electrode is 300nm; and the material of the interdigital electrode is platinum.

[0006] In an optional implementation manner, the first voltage value is 0.1V; and the first time period is 1 second.

[0007] In an optional implementation, the second voltage value is 1.65V.

[0008] In an optional embodiment, the redox ion is a hypochlorite ion.

[0009] In the second aspect, an embodiment of the present invention provides a sensor, wherein the sensor includes a controller and interdigitated electrodes with a preset spacing; the interdigitated electrodes are placed in the liquid to be detected; the interdigitated electrodes are connected to an external power supply; the interdigitated electrodes include: a first electrode and a second electrode; the controller is connected to the first electrode and the second electrode respectively; the controller is used to control the power supply to apply a forward voltage of a first voltage value of a preset first time period on the interdigitated electrodes, so that the redox ions in the liquid to be detected are enriched near the first electrode; wherein a positive voltage is applied to the first electrode and a negative voltage is applied to the second electrode to form the forward voltage; the power supply is controlled to apply a reverse voltage of a second voltage value of a preset second time period on the interdigitated electrodes, so that the redox ions enriched near the first electrode are reduced to generate an output current; based on the output current, the concentration of the redox ions in the liquid to be detected is determined.

[0010] In an optional embodiment, the sensor further comprises a current detection circuit connected to the controller; the current detection circuit is used to detect the output current generated after the redox ions are reduced.

[0011] In an optional embodiment, the preset spacing is 100um; the width of the interdigital electrode is 100um; the length of the interdigital electrode is 4mm; the thickness of the interdigital electrode is 300nm; the number of the interdigital electrodes is 10; and the material of the interdigital electrodes is platinum.

[0012] In a third aspect, an embodiment of the present invention provides an electronic device, wherein the electronic device includes a processor and a memory, the memory stores computer-executable instructions that can be executed by the processor, and the processor executes the computer-executable instructions to implement the redox ion detection method based on interdigital electrodes of any of the aforementioned embodiments.

[0013] The embodiments of the present invention bring the following beneficial effects:

[0014] The present invention provides a redox ion detection method and sensor based on interdigital electrodes, which are applied to a controller; the controller is connected to interdigital electrodes with a preset spacing; the interdigital electrodes are placed in a liquid to be detected; the interdigital electrodes are connected to an external power supply; the interdigital electrodes include: a first electrode and a second electrode; the method includes: controlling the power supply to apply a forward voltage of a first voltage value of a preset first time period to the interdigital electrodes, so that the redox ions in the liquid to be detected are enriched near the first electrode; wherein a positive voltage is applied to the first electrode and a negative voltage is applied to the second electrode to form the forward voltage; controlling the power supply to apply a reverse voltage of a second voltage value of a preset second time period to the interdigital electrodes, so that the redox ions enriched near the first electrode are reduced and generate an output current; and determining the concentration of the redox ions in the liquid to be detected based on the output current. This technology improves the concentration of redox ions during detection by first enriching the redox ions and then detecting them, thereby improving detection accuracy.

[0015] Other features and advantages of the present invention will be set forth in the following description, or some features and advantages may be inferred or unambiguously determined from the description, or may be learned by implementing the above-mentioned technology of the present invention.

[0016] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are specifically listed below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A schematic flow chart of a method for detecting redox ions based on interdigital electrodes provided in an embodiment of the present invention;

[0019] Figure 2 A schematic diagram of a use scenario of a redox ion detection method based on interdigital electrodes provided in an embodiment of the present invention;

[0020] Figure 3 A schematic diagram of ion concentration during use of a redox ion detection method based on interdigital electrodes provided in an embodiment of the present invention;

[0021] Figure 4A schematic diagram of redox reactions during use of another redox ion detection method based on interdigital electrodes provided by an embodiment of the present invention;

[0022] Figure 5 A schematic diagram of redox reactions during use of the third redox ion detection method based on interdigital electrodes provided in an embodiment of the present invention;

[0023] Figure 6 A schematic diagram of redox reactions during use of the fourth redox ion detection method based on interdigital electrodes provided in an embodiment of the present invention;

[0024] Figure 7 A schematic diagram of redox reactions during use of the fifth redox ion detection method based on interdigital electrodes provided in an embodiment of the present invention;

[0025] Figure 8 A schematic diagram of the output current intensity during use of a redox ion detection method based on interdigital electrodes provided by an embodiment of the present invention;

[0026] Figure 9 A schematic structural diagram of a sensor provided by an embodiment of the present invention;

[0027] Figure 10 A schematic structural diagram of an interdigital electrode provided by an embodiment of the present invention;

[0028] Figure 11 A schematic structural diagram of an electronic device provided by an embodiment of the present invention.

[0029] Icons: 1-first sampling point; 2-second sampling point; 4-fourth sampling point; 5-fifth sampling point; 6-sixth sampling point; 11-first electrode; 12-second electrode; 13-redox ions; 801-sampling process of traditional method; 802-sampling process of this method; 14-reduced ions; 21-controller; 22-interdigital electrodes; 23-power supply; 100-preset spacing; 101-width of interdigital electrodes; 102-length of interdigital electrodes; 103-thickness of interdigital electrodes; 41-memory; 42-processor; 43-bus; 44-communication interface. DETAILED DESCRIPTION

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0032] At present, existing electrochemical detection sensors are widely used in the field of water environment detection due to their advantages such as high sensitivity, fast response speed and simple detection process. Here, measuring the accuracy of pollutant detection is a hot topic of concern for relevant researchers. Furthermore, in order to achieve high-precision detection of low-range pollutants, existing electrochemical detection sensors are required to have high sensitivity characteristics. At present, existing technologies use materials with high electrocatalytic activity, micro-nano clusters or columns or particle structures to modify the electrode surface, giving electrochemical detection sensors higher detection capabilities, thereby achieving low-range and high-sensitivity detection of pollutants.

[0033] Based on this, embodiments of the present invention provide a method, sensor, and electronic device for detecting redox ions using interdigital electrodes. This technology improves the concentration of redox ions during detection and enhances detection accuracy. To facilitate understanding of this embodiment, a method for detecting redox ions using interdigital electrodes is first described in detail.

[0034] Example 1

[0035] Figure 1 A schematic flow chart of a method for detecting redox ions using interdigital electrodes, provided in an embodiment of the present invention. The method is applied to a controller connected to interdigital electrodes spaced at a predetermined distance; the interdigital electrodes are placed in a liquid to be detected; the interdigital electrodes are connected to an external power source; and the interdigital electrodes include a first electrode 11 and a second electrode 12.

[0036] The above methods include:

[0037] Step S101: Control the power supply to apply a forward voltage of a first voltage value of a preset first time period to the interdigitated electrodes, so that the redox ions in the liquid to be detected are enriched near the first electrode; wherein a positive voltage is applied to the first electrode and a negative voltage is applied to the second electrode to form the forward voltage.

[0038] For ease of understanding, Figure 2 A schematic diagram of a usage scenario of a redox ion detection method based on interdigital electrodes provided by an embodiment of the present invention; Figure 3Schematic diagram of ion concentration during the use of a method for detecting redox ions based on interdigital electrodes provided by an embodiment of the present invention. Figure 3 As can be seen, by utilizing the principle of electromigration of redox ions 13 under the action of an electric field, an electric field of a certain magnitude and direction is applied to the first electrode 11 and the second electrode 12, thereby causing the redox ions 13 to move to the vicinity of the first electrode 11. It should be understood that the electrode spacing, the enrichment potential, and the enrichment time are all related to the enrichment efficiency.

[0039] In this embodiment, the preset spacing is 100um; the width of the interdigital electrodes is 100um; the length of the interdigital electrodes is 4mm; the number of the interdigital electrodes is 10; the thickness of the interdigital electrodes is 300nm; and the material of the interdigital electrodes is platinum.

[0040] Furthermore, the first voltage value is 0.1V; and the first time period is 1 second.

[0041] Step S102: controlling the power supply to apply a reverse voltage of a second voltage value of a preset second time period to the interdigital electrodes, so that the redox ions accumulated near the first electrode are reduced to generate an output current.

[0042] In this embodiment, the second voltage value is 1.65V.

[0043] Furthermore, the above-mentioned redox ions are hypochlorite ions; and the ions after reduction described below are chloride ions.

[0044] Figure 4 Schematic diagram of redox reaction during use of another redox ion detection method based on interdigital electrodes provided by an embodiment of the present invention. Figure 4 It can be seen that when the power supply applies a reverse voltage of a second voltage value of a preset second time period to the interdigitated electrodes, the redox ions enriched near the first electrode 11 are reduced, thereby generating reduced ions 14, thereby generating an output current.

[0045] Here, due to the concentration diffusion effect, the enriched area formed by the high concentration of redox ions moves toward the above-mentioned first electrode 11, and the output current corresponding to this process increases; as the enriched area moves to the surface of the above-mentioned first electrode 11, the output current reaches a maximum value (as a sampling signal of the transient-chronoamperometry); as the concentration of redox ions decreases, the output current decreases until the current balance is reached and a steady state is reached.

[0046] For ease of understanding, Figure 5A schematic diagram of redox reactions during use of a third interdigital electrode-based redox ion detection method according to an embodiment of the present invention; Figure 6 A schematic diagram of redox reactions during use of a fourth interdigital electrode-based redox ion detection method according to an embodiment of the present invention; Figure 7 A schematic diagram of redox reactions during the use of a fifth method for detecting redox ions based on interdigital electrodes provided by an embodiment of the present invention.

[0047] The process can be described as follows: First, the redox ions 13 on the surface of the first electrode 11 are reduced, generating an output current. Then, due to concentration diffusion, the enriched region approaches the electrode surface, gradually increasing the concentration of the redox ions 13 at the first electrode 11, intensifying the electrochemical reaction and subsequently increasing the output current. Finally, as the enriched region is consumed, the concentration of the redox ions 13 on the first electrode 11 begins to decrease, weakening the electrochemical reaction and subsequently decreasing the output current.

[0048] For ease of understanding, Figure 8 A schematic diagram of the output current intensity during the use of a method for detecting redox ions based on interdigital electrodes provided by an embodiment of the present invention. Figure 8 As can be seen, in the sampling process 802 of this method, the redox ions 13 on the surface of the first electrode 11 are reduced, generating an output current corresponding to Figure 8 As shown in the first sampling point 1 to the second sampling point 2; Due to the concentration diffusion effect, the enriched area is close to the electrode surface, so the concentration of the redox ions 13 of the first electrode 11 gradually increases, the electrochemical reaction intensifies, and the output current increases accordingly, corresponding to Figure 8 As shown in the fourth sampling point 4 to the fifth sampling point 5; due to the consumption of the enriched area, the concentration of the redox ions 13 on the first electrode 11 begins to decrease, the electrochemical reaction weakens, and the output current decreases accordingly, corresponding to Figure 8 As shown in the fifth sampling point 5 to the sixth sampling point 6, it is obvious that the output current of the sampling process 802 of the present method is larger than that of the sampling process 801 of the traditional method, thereby significantly improving the detection accuracy.

[0049] Step S103: determining the concentration of the redox ions in the liquid to be detected according to the output current.

[0050] The present invention provides a method for detecting redox ions based on interdigital electrodes, which is applied to a controller; the controller is connected to interdigital electrodes with a preset spacing; the interdigital electrodes are placed in a liquid to be detected; the interdigital electrodes are connected to an external power supply; the interdigital electrodes include: a first electrode and a second electrode; the method includes: controlling the power supply to apply a forward voltage of a first voltage value of a preset first time period to the interdigital electrodes, so that the redox ions in the liquid to be detected are enriched near the first electrode; wherein a positive voltage is applied to the first electrode and a negative voltage is applied to the second electrode to form the forward voltage; controlling the power supply to apply a reverse voltage of a second voltage value of a preset second time period to the interdigital electrodes, so that the redox ions enriched near the first electrode are reduced and generate an output current; and determining the concentration of the redox ions in the liquid to be detected based on the output current. This technology improves the concentration of redox ions during detection by first enriching the redox ions and then detecting them, thereby improving detection accuracy.

[0051] Example 2

[0052] Based on the redox ion detection method based on interdigital electrodes provided in Example 1, this embodiment provides a sensor, Figure 9 A schematic structural diagram of a sensor provided by an embodiment of the present invention.

[0053] Depend on Figure 9 As can be seen, the above-mentioned sensor includes a controller 21 and interdigitated electrodes 22 with a preset spacing; the above-mentioned interdigitated electrodes are placed in the liquid to be detected; the above-mentioned interdigitated electrodes 22 are connected to an external power supply 23; the above-mentioned interdigitated electrodes include: a first electrode 11 and a second electrode 12; the above-mentioned controller 21 is connected to the above-mentioned first electrode and the above-mentioned second electrode respectively.

[0054] In this embodiment, the controller 21 is used to control the power supply to apply a forward voltage of a first voltage value of a preset first time period on the interdigitated electrodes 22, so that the redox ions in the liquid to be detected are enriched near the first electrode 11; wherein, a positive voltage is applied to the first electrode 11, and a negative voltage is applied to the second electrode 12 to form the forward voltage; the power supply 23 is controlled to apply a reverse voltage of a second voltage value of a preset second time period on the interdigitated electrodes 22, so that the redox ions enriched near the first electrode 11 are reduced to generate an output current; based on the output current, the concentration of the redox ions in the liquid to be detected is determined.

[0055] In one embodiment, the sensor further includes a current detection circuit connected to the controller 21 ; the current detection circuit is used to detect the output current generated after the redox ions are reduced.

[0056] Here, for ease of understanding, Figure 10 Schematic diagram of the structure of an interdigital electrode provided by an embodiment of the present invention. Figure 10 As can be seen, the preset spacing 100 is 100um; the width 101 of the interdigital electrode is 100um; the length 102 of the interdigital electrode is 4mm; the number of the interdigital electrodes is 10; the thickness 103 of the interdigital electrode is 300nm; and the material of the interdigital electrodes is platinum.

[0057] The sensor provided in the embodiments of the present invention shares the same technical features as the redox ion detection method based on interdigitated electrodes provided in the aforementioned embodiments, and thus solves the same technical problems and achieves the same technical effects. Those skilled in the art will readily appreciate that, for ease and brevity of description, the specific operating process of the sensor described above can be referenced to the corresponding process in the aforementioned method embodiments and will not be further elaborated here.

[0058] Example 3

[0059] This embodiment provides an electronic device, including a processor and a memory, wherein the memory stores computer-executable instructions that can be executed by the processor, and the processor executes the computer-executable instructions to implement the steps of the redox ion detection method based on interdigital electrodes.

[0060] This embodiment provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of a redox ion detection method based on interdigital electrodes.

[0061] See also Figure 11 The schematic diagram of the structure of an electronic device shown in the figure comprises: a memory 41 and a processor 42. The memory 41 stores a computer program that can be run on the processor 42. When the processor executes the computer program, the steps provided by the above-mentioned redox ion detection method based on interdigital electrodes are implemented.

[0062] like Figure 11 As shown, the device further includes: a bus 43 and a communication interface 44, and a processor 42, a communication interface 44 and a memory 41 are connected via the bus 43; the processor 42 is used to execute executable modules stored in the memory 41, such as computer programs.

[0063] The memory 41 can include a high-speed random access memory (RAM), and can also include a non-volatile memory such as at least one disk memory. The communication connection between the system network element and at least one other network element is realized through at least one communication interface 44 (which can be wired or wireless), and the Internet, a wide area network, a local area network, a metropolitan area network, etc. can be used.

[0064] The bus 43 can be an ISA bus, a PCI bus, an EISA bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 11 Only one bidirectional arrow is used to represent the bus in the figure, but it does not mean that there is only one bus or only one type of bus.

[0065] The memory 41 is used to store programs, and the processor 42 executes the programs after receiving execution instructions. The method performed by the sensor disclosed in any embodiment of the application can be applied to the processor 42 or implemented by the processor 42. The processor 42 can be an integrated circuit chip with signal processing capability. In the implementation process, each step of the above method can be completed by the integrated logic circuit of hardware in the processor 42 or the instruction in the form of software. The processor 42 described above can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. Each method, step and logic block disclosed in the embodiments of the application can be implemented or executed by the processor. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in combination with the embodiments of the application can be directly embodied as a hardware code processor for execution, or a combination of hardware and software modules in the code processor for execution. The software module can be located in a random access memory, a flash memory, a read-only memory, a programmable read-only memory, an electrically erasable programmable memory, a register, or other mature storage media in the art. The storage medium is located in the memory 41, and the processor 42 reads the information in the memory 41 and combines the hardware to complete the steps of the above method.

[0066] Furthermore, an embodiment of the present invention also provides a machine-readable storage medium, which stores machine-executable instructions. When the machine-executable instructions are called and executed by the processor 42, the machine-executable instructions prompt the processor 42 to implement the above-mentioned redox ion detection method based on interdigital electrodes.

[0067] The electronic device and computer-readable storage medium provided by the embodiments of the present invention have the same technical features, and therefore can solve the same technical problems and achieve the same technical effects.

[0068] In addition, in the description of the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0069] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

Claims

1. A method for detecting redox ions based on interdigital electrodes, characterized in that: Applied to a controller; the controller is connected to interdigital electrodes with a preset spacing; the interdigital electrodes are placed in a liquid to be detected; The interdigital electrodes are connected to an external power supply; the interdigital electrodes include: a first electrode and a second electrode; the material of the interdigital electrodes is platinum; the redox ions are hypochlorite ions; the method includes: Controlling the power supply to apply a forward voltage of a first voltage value of a preset first time period to the interdigitated electrodes, so that the redox ions in the liquid to be detected are enriched near the first electrodes; wherein a positive voltage is applied to the first electrode and a negative voltage is applied to the second electrode to form the forward voltage; the first voltage value is 0.1V; and the first time period is 1s; Controlling the power supply to apply a reverse voltage of a second voltage value of a preset second time period to the interdigital electrodes, so that the redox ions enriched near the first electrode are reduced to generate an output current; the second voltage value is 1.65V; The concentration of the redox ions in the liquid to be detected is determined according to the output current.

2. The redox ion detection method based on interdigital electrodes according to claim 1, characterized in that: The preset spacing is 100 um; the width of the interdigital electrodes is 100 um; the length of the interdigital electrodes is 4 mm; the number of the interdigital electrodes is 10; and the thickness of the interdigital electrodes is 300 nm.

3. A sensor used in the redox ion detection method based on interdigital electrodes according to claim 1, characterized in that: The sensor includes a controller and interdigitated electrodes with a preset spacing; The interdigital electrodes are placed in the liquid to be detected; The interdigital electrodes are connected to an external power supply; the interdigital electrodes include: a first electrode and a second electrode; the controller is connected to the first electrode and the second electrode respectively; The controller is used to control the power supply to apply a forward voltage of a first voltage value of a preset first time period to the interdigital electrodes, so that the redox ions in the liquid to be detected are enriched near the first electrode; wherein, a positive voltage is applied to the first electrode and a negative voltage is applied to the second electrode to form the forward voltage; the power supply is controlled to apply a reverse voltage of a second voltage value of a preset second time period to the interdigital electrodes, so that the redox ions enriched near the first electrode are reduced to generate an output current; and the concentration of the redox ions in the liquid to be detected is determined based on the output current.

4. The sensor according to claim 3, characterized in that The sensor further comprises a current detection circuit connected to the controller; the current detection circuit is used to detect the output current generated after the redox ions are reduced.

5. The sensor according to claim 3, characterized in that The preset spacing is 100um; the width of the interdigital electrodes is 100um; the length of the interdigital electrodes is 4mm; the thickness of the interdigital electrodes is 300nm; the number of the interdigital electrodes is 10; and the material of the interdigital electrodes is platinum.

6. An electronic device, characterized in that: The electronic device includes a processor and a memory, wherein the memory stores computer-executable instructions that can be executed by the processor, and the processor executes the computer-executable instructions to implement the redox ion detection method based on interdigital electrodes according to any one of claims 1 to 2.

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