CN109813759B - Specific ion detection system - Google Patents
Specific ion detection system Download PDFInfo
- Publication number
- CN109813759B CN109813759B CN201711157691.6A CN201711157691A CN109813759B CN 109813759 B CN109813759 B CN 109813759B CN 201711157691 A CN201711157691 A CN 201711157691A CN 109813759 B CN109813759 B CN 109813759B
- Authority
- CN
- China
- Prior art keywords
- current signal
- specific
- detection
- ion
- detection current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The present invention provides a detection system for specific ions, comprising: the central processing module is used for sending a detection instruction aiming at the specific ions; the sensing module is used for receiving the detection instruction and generating a detection current signal formed by specific ions in the solution to be detected according to the detection instruction; the sensing module analyzes the detection current signal to detect the concentration information of specific ions in the solution to be detected; or the central processing module receives the detection current signal generated by the sensing module and analyzes the detection current signal so as to detect the concentration information of the specific ions in the solution to be detected. The specific ion detection system provided by the invention directly measures the concentration of each specific ion in the liquid substance by combining an electrochemical method with the solid electrode, and has the advantages of accurate and stable data, large measurement range and high measurement precision.
Description
Technical Field
The invention belongs to the technical field of ion detection, relates to a detection system, and particularly relates to a detection system for specific ions.
Background
With the development of modern society, the detection of various ions has great demand in various industries such as food, agriculture, medical treatment and the like. For example, calcium ion, because the concentration of calcium ion has a significant effect on the storage of apples, detection of the concentration of calcium ion after picking apples is of particular value to the apple industry. In addition, in the dairy industry, there is a wide demand for the detection of calcium content in milk. In the medical industry, the rapid and effective detection of calcium ions is of great significance in cardiac surgery for patients with poor liver and kidney functions.
The existing detection technology comprises a calcium ion selective electrode, an inductively coupled plasma mass spectrum and the like. The calcium ion selective electrode needs to be matched with electrolyte for use, and the measurement accuracy is not high. The inductively coupled plasma mass spectrometry has high measurement accuracy, but the measurement period is long.
Therefore, how to provide a system for detecting specific ions to solve the defects that the prior art cannot accurately and rapidly detect the concentration information of specific ions in a solution to be detected has become a technical problem to be solved by those skilled in the art.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a system for detecting specific ions, which is used to solve the problem that the prior art cannot accurately and quickly detect the concentration information of specific ions in the solution to be detected.
To achieve the above and other related objects, the present invention provides an ion-specific detection system, comprising: the central processing module is used for sending a detection instruction aiming at the specific ions; the sensing module is used for receiving the detection instruction and generating a detection current signal formed by specific ions in the solution to be detected according to the detection instruction; the sensing module analyzes the detection current signal to detect the concentration information of specific ions in the solution to be detected; or the central processing module receives the detection current signal generated by the sensing module and analyzes the detection current signal so as to detect the concentration information of the specific ions in the solution to be detected.
In an embodiment of the present invention, the sensing module includes: the control unit is used for receiving the detection instruction and outputting a charging instruction or a discharging instruction according to the detection instruction; the measurement unit is used for generating a first detection current signal formed by specific ions adsorbed by the measurement unit when the control unit starts to charge the measurement unit when the charging instruction is received; or a second detection current signal formed by specific ions desorbed from the measuring unit is generated when the measuring unit starts to discharge when the discharge instruction is received.
In an embodiment of the present invention, the measurement unit includes: a specific ion-selective electrode, and a counter electrode; the counter electrode is of opposite polarity to the particular ion-selective electrode.
In an embodiment of the present invention, a liquid flow channel for loading the solution to be detected is provided between the specific ion selective electrode and the counter electrode; a specific ion selective film is pasted on the surface of the specific ion selective electrode, which is in contact with the solution to be detected; the specific ion selective membrane is used for adsorbing the specific ions from the solution to be detected and repelling other ions with the polarity opposite to that of the specific ions when the control unit charges the measuring unit; and taking the number of the specific ions adsorbed on the specific ion selection electrode as the number of the specific ions in the solution to be detected.
In an embodiment of the present invention, the specific ion selective electrode further includes: a carbon-based material layer and a conductive substrate; the other surface of the specific ion selective film is attached to one surface of the carbon-based material layer, and the other surface of the carbon-based material layer is attached to one surface of the conductive substrate.
In an embodiment of the invention, when the specific ion selective membrane adsorbs specific ions, a first ion current signal is generated between the specific ion selective electrode and the counter electrode, and the first detection current signal has the same amplitude and opposite direction to the first ion current signal; when the specific ion selective film desorbs specific ions, a second ion current signal is generated between the specific ion selective electrode and the counter electrode, and the amplitude of the second detection current signal is the same as that of the second ion current signal, and the direction of the second detection current signal is opposite to that of the second ion current signal.
In an embodiment of the invention, after the measuring unit generates the first detection current signal or the second detection current signal, the control unit performs time integration on the first detection current signal and the second detection current signal respectively to calculate an electric quantity value of the specific ion adsorbed by the specific ion detection sensor; taking the absolute value of the calculated electric quantity value, and calculating the average value of the specific ion electric quantity according to the cycle times of outputting a charging instruction and a discharging instruction; and calculating the concentration information of the specific ions in the solution to be detected according to the average value of the specific ion electric quantity.
In an embodiment of the present invention, the control unit is further configured to convert the concentration information of the specific ions in the solution to be detected into a data format meeting the requirement of the central processing module, and transmit the data format.
In an embodiment of the invention, the control unit is electrically connected to a first current collecting unit disposed on the specific ion selective electrode in the measurement unit and a second current collecting unit disposed on the counter electrode in the measurement unit, so as to form a connection between the control unit and the measurement unit.
In an embodiment of the present invention, the control unit converts the first detection current signal or the second detection current signal generated by the measurement unit into a data format meeting the requirement of the central processing module, and transmits the data format; after the central processing module receives the first detection current signal or the second detection current signal, respectively performing time integration on the first detection current signal and the second detection current signal to calculate an electric quantity value of the specific ions adsorbed by the specific ion detection sensor; taking the absolute value of the calculated electric quantity value, and calculating the average value of the specific ion electric quantity according to the cycle times of outputting a charging instruction and a discharging instruction; and calculating the concentration information of the specific ions in the solution to be detected according to the average value of the specific ion electric quantity.
In an embodiment of the present invention, the control unit is further configured to perform a subsequent process on the detected concentration information; or the central processing module is further used for preprocessing the first detection current signal or the second detection current signal transmitted by the sensing module.
In an embodiment of the invention, the central processing module is further configured to output the detection instruction to the measurement module in a cycle with a preset detection period.
As described above, the specific ion detection system of the present invention has the following advantageous effects:
the specific ion detection system provided by the invention directly measures the concentration of each specific ion in the liquid substance by combining an electrochemical method with the solid electrode, and has the advantages of accurate and stable data, large measurement range and high measurement precision.
Drawings
Fig. 1 is a schematic structural diagram of a specific ion detection system according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of the sensing module according to the present invention.
Fig. 3 is a schematic diagram of the first detected current signal and the second detected current signal collected according to the present invention.
Description of the element reference numerals
1 detection System for specific ions
11 central processing module
12 sensing module
121 control unit
122 measuring unit
21 first current collector
22 second current collector
23 measuring appliance
231 specific ion selective electrode
232 pairs of electrodes
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
Example one
The present embodiment provides a system for detecting specific ions, including:
the central processing module is used for sending a detection instruction aiming at the specific ions;
the sensing module is used for receiving the detection instruction and generating a detection current signal formed by specific ions in the solution to be detected according to the detection instruction;
the sensing module analyzes the detection current signal to detect the concentration information of specific ions in the solution to be detected; or the central processing module receives the detection current signal generated by the sensing module and analyzes the detection current signal so as to detect the concentration information of the specific ions in the solution to be detected.
The detection system for specific ions provided in the present embodiment will be described in detail with reference to the drawings. Referring to fig. 1, a schematic structural diagram of a specific ion detection system in one embodiment is shown. As shown in fig. 1, the system 1 for detecting specific ions includes a central processing module 11 and a sensing module 12. The sensing module 12 comprises a control unit 121 and a measurement unit 122.
The central processing module 11 is configured to send a detection instruction for the specific ion. In this embodiment, the central processing module is configured to output the detection instruction to the measurement module 12 in a cycle with a preset detection period.
The sensing module 12 connected to the central processing module 11 is configured to receive the detection instruction, and generate a detection current signal formed by specific ions in the solution to be detected according to the detection instruction. In this embodiment, the central processing module 11 and the sensing module 12 may be connected by wire or wirelessly.
In this embodiment, if the amount of the generated detection current signals is too large, which is not suitable for transmission, and the load of the central processing module is increased, the sensing module 12 may be configured to analyze the detection current signals to detect the concentration information of the specific ions in the solution to be detected; or the central processing module can be used for receiving the detection current signal generated by the sensing module and analyzing the detection current signal so as to detect the concentration information of the specific ions in the solution to be detected.
The specific structure of the sensing module 12 will be specifically analyzed below. Please refer to fig. 2, which is a schematic diagram of a sensing module. As shown in fig. 2, the sensing module 12 includes a control unit 121 and a measurement unit 122. The measuring unit 122 includes a first current collector 21, a second current collector 22, and a measurer 23. In this embodiment, a first current collector 21 and a second current collector 22 are used to form the connection between the control unit and the measuring device, the first current collector 21 is disposed on the specific ion-selective electrode in the measuring unit 122, and the second current collector 22 is disposed on the pair of electrodes in the measuring unit. In practical applications, the specific ion may be a cation, an anion, a compound with electronegativity or a compound with electropositivity. Cations such as calcium, sodium, ammonium, magnesium, etc., and anions such as chloride, fluoride, nitrate, nitrite, sulfate, etc. In this embodiment, the content of the detection instruction includes a preset detection period, and instructs the control unit 121 to send a charging instruction or a discharging instruction to the measurement unit 122 at intervals of the preset detection period.
The control unit 121 is configured to, after receiving a detection instruction from the central processing module 11, continuously apply a constant voltage (in this embodiment, the voltage value of the constant voltage is between 0.01V and 1.2V, and the time length is between 1 and 100 seconds) for a certain time length to the measurement unit 122, and the measurement unit 122 generates a first detection current signal formed by the specific ions adsorbed by the measurement unit.
The measurer 23 includes: a specific ion selection electrode 231 and a counter electrode 232; the counter electrode 232 is of opposite polarity to the particular ion-selective electrode 231. The first current collector 21 is disposed outside the specific ion selective electrode 231, and the second current collector 22 is disposed outside the counter electrode 232.
A liquid flow channel 233 for loading the solution to be detected is arranged between the specific ion selective electrode 231 and the counter electrode 232; the surface of the specific ion selective electrode 231, which is in contact with the solution to be detected, is pasted with a specific ion selective film; the specific ion selective membrane is used for adsorbing the specific ions from the solution to be detected and repelling other ions with the polarity opposite to that of the specific ions; and taking the number of the specific ions adsorbed on the specific ion selection electrode as the number of the specific ions in the solution to be detected.
In this embodiment, the specific ion selective electrode is sequentially provided with a conductive substrate, a carbon-based material layer (the carbon-based material may be activated carbon, carbon nanotubes, graphene, or the like), and a specific ion selective film from top to bottom. In this embodiment, the carbon-based material layer is an activated carbon surface.
In this embodiment, the conductive substrate needs to have good conductivity, and the sheet resistance needs to be lower than 10 ohm per square centimeter. For example, the conductive substrate can be prepared from graphite sheets, graphite paper, conductive glass, titanium sheets, and the like.
After the conductive substrate is selected, an active carbon surface is required to be attached to the conductive substrate. In this embodiment, the activated carbon face 141B is a carbon face formed by activated carbon slurry, and the thickness is controlled to be 50-300 μm. In this embodiment, the activated carbon slurry includes activated carbon, conductive carbon black, polyvinylidene fluoride, and an organic solvent.
For example, the various ingredients in the activated carbon slurry are activated carbon: conductive carbon black: polyvinylidene fluoride (PVDF) was mixed with an organic solvent at a ratio of 1:8: 1. In this example, N-methylpyrrolidone (NMP) was used as the organic solvent, and the ratio of N-methylpyrrolidone (NMP) to polyvinylidene fluoride (PVDF) was 5:1 to 20: 1.
The surface of the specific ion selective electrode, which is in contact with the solution to be detected, is pasted with a specific ion selective film which is used for adsorbing specific ions from the solution to be detected and repelling other ions with the polarity opposite to that of the specific ions. The specific ion includes a specific ion and a compound having the same polarity as the specific ion. In practical applications, the specific ion may be a cation, an anion, a compound with electronegativity or a compound with electropositivity. Cations such as calcium, sodium, ammonium, magnesium, etc., and anions such as chloride, fluoride, nitrate, nitrite, sulfate, etc. The counter electrode is used for adsorbing ions with the polarity opposite to that of the specific ions. In this embodiment, taking calcium ions as an example, the calcium ion selective electrode adsorbs calcium ions, and rejects other ions other than calcium ions outside the electrode structure of the calcium ion selective electrode.
The specific ion selective film is a paste layer formed by selectively adsorbing raw materials by an electrolyte. In an embodiment, the electrolyte selective adsorption raw material comprises a specific ionophore, sodium borate, nitrobenyl ether, polyvinyl chloride, and a tetrahydrofuran solvent.
For example, 1% by weight of calcium ionophore ETH 129, 0.2% sodium borate (KTFPB), 65.8% nitroben-zenyl octyl ether (NPOE), 33% polyvinyl chloride (PVC), were dissolved in tetrahydrofuran solvent (THF solvent), and the dry weight of the mixture was 15%.
If the specific ion is another ion, the specific ionophore in the electrolyte selective adsorption material is replaced with an electrolyte support corresponding to the electrolyte.
In this embodiment, the specific ion selective electrode may be further configured as a conductive substrate and a specific ion selective film attached to the conductive substrate from top to bottom.
In this embodiment, the conductive substrate needs to have good conductivity, and the sheet resistance needs to be lower than 10 ohm per square centimeter. For example, the conductive substrate can be prepared from graphite sheets, graphite paper, conductive glass, titanium sheets, and the like.
In this embodiment, the specific ion-selective thin film closely attached to the conductive substrate is an attachment layer formed of a mixed material for adsorbing specific ions. The mixed raw materials comprise activated carbon slurry and ion selective adsorption raw materials.
The active carbon slurry comprises active carbon, conductive carbon black, polyvinylidene fluoride and an organic solvent. The selective adsorption raw materials of the electrolyte comprise a specific ion carrier, sodium borate, nitrobenzene octyl ether, polyvinyl chloride and tetrahydrofuran solvent.
In this embodiment, in order to adsorb more specific ions, adsorption holes including micropores, mesopores, and macropores may be disposed in the specific ion selective electrode according to a predetermined ratio; wherein the diameter of the micropores is less than 20 nm; the diameter of the mesopores is more than or equal to 20nm and less than or equal to 50 nm; the macropores have a diameter of greater than 50 nm. For example, the cathode and anode of the sensor each have adsorption pores that comprise about 50% and more of the electrode volume.
The operation process of the control unit 121:
first, the control unit 121 receives a charging instruction output by the central processing module 11. In this embodiment, after the charging command is sent to the control unit 121, the control unit 121 applies a dc voltage of 0.2V to the first current collector 21 and the second current collector 22, ions in the flow channel move to the electrodes under the action of the dc voltage, wherein cations move to the cathode and anions move to the anode, an ion current is generated, the adsorbed ions are stored in the electric double layer of the specific ion-selective electrode, and accordingly, the first detection current of the control unit 121 for the specific ion detection sensor is generated between the first current collector 121 and the second current collector 122. The first detection current has a direction opposite to the current direction of the charging current applied to the measurer by the controller and decays rapidly.
Next, the control unit 121 starts charging the specific ion detection sensor, starts ion transfer between the specific ion selection electrode and the counter electrode when the specific ion selective film adsorbs specific ions, generates a first ion current signal inside the specific ion detection sensor, generates electron transfer between the first current collector 121 and the second current collector 122, generates an electron current, i.e., a first detection current signal, and collects the first detection current signal of the controller for the specific ion detection sensor. The first detection current signal and the first ion current signal have the same amplitude and opposite directions;
after the charging is completed, the control unit 121 receives the discharging instruction output by the central processing module 11. In this embodiment, after the discharge command is sent to the control unit 121, the control unit applies a voltage of 0V to the first current collector 11 and the second current collector 12, and the ions in the liquid flow channel move to the electrodes under the action of the dc voltage, wherein cations are desorbed from the cathode, anions are desorbed from the anode, an ion current is generated, and an electron transfer is generated between the first current collector 11 and the second current collector 12, that is, a second detection current of the controller for the specific ion detection sensor is generated. The second detection current has a direction opposite to the current direction of the discharge current applied to the measuring device by the controller and rapidly decays. The discharge current is equal to an ion current generated by the specific ion detection sensor.
When the specific ion detection sensor starts to discharge, the control unit 121 acquires a second detection current of the controller to the specific ion detection sensor. The second detection current is equal to an ion current generated by the specific ion detector during discharge.
In this embodiment, the control unit 121 cycles through a preset detection period and outputs the charging command and the discharging command to the measurement unit 122 at intervals, and cyclically generates and collects the first detection current signal and the second detection current signal. Please refer to fig. 3, which shows a schematic diagram of the collected first and second detection current signals. As shown in fig. 3, the first detection current signal is I1, the second detection current signal is I2, the horizontal axis represents a time axis, the vertical axis represents a current amplitude, and a hatched area enclosed by a curve of the time axis and the first detection current is equal to a hatched area enclosed by a curve of the time axis and the second detection current because the charge amount at the charge and discharge point is the same.
The first detection current and the second detection current are collected again, and the control unit 12 analyzes the concentration information of the specific ions adsorbed by the specific ion detection sensor.
The control unit 121 is specifically configured to:
the first detection current I1 and the second detection current I2 are respectively integrated with time (as shown in the formula) to calculate the electric quantity value of the specific ion adsorbed by the specific ion detection sensor.
═ Q formula (1)
And taking the absolute value of the calculated electric quantity value, and calculating the average value of the specific ion electric quantity according to the cycle times of outputting the charging instruction and the discharging instruction.
For example, | Q1| ═ Q2| ═ Q3| ═ Q4 |;
and calculating the concentration information of the specific ions in the solution to be detected according to the average value of the specific ion electric quantity. The information of the concentration of the specific ion in the solution to be detected is represented by C.
For example, the detected specific ion charge of the control unit 121 can measure the charge value for a series of known ion concentrations, and generate a standard curve of the ion concentration relative to the charge. For a solution with unknown ion concentration, the measured electric quantity value can be brought into the standard curve to obtain the corresponding ion concentration.
Please refer to table 1 for comparison of detection accuracy between the specific ion detection system of the present embodiment and the prior art
Table 1: specific ion concentration detection precision comparison table in the application and the prior art
From the above experimental data, it is known that the detection system for specific ions provided in the present embodiment has higher detection accuracy than the detection system of the prior art.
After calculating the concentration information of the specific ions in the solution to be detected, the control unit 121 is further configured to convert the concentration information of the specific ions in the solution to be detected into a data format (for example, including encrypting and packaging the data information and physically converting the signal) meeting the requirement of the central processing module 11, and transmit the data format to the central processing module 11. For example, the concentration information conforming to the data format required by the central processing module 11 is transmitted by the SPI transmission method. In this embodiment, before converting the data, the control unit 121 is further configured to perform subsequent processing such as signal filtering and denoising on the detected density information.
In this embodiment, if the amount of data generated by the sensing module 12 is not large, the sensing module 12 converts the generated first detected current signal or second detected current signal into a data format (for example, including encrypting, packaging, and physically converting the signal) conforming to the requirement of the central processing module, and transmits the data format to the central processing module 11.
After the central processing module receives the first detection current signal or the second detection current signal, preprocessing, such as decryption, signal filtering, denoising and the like, is performed on the first detection current signal and the second detection current signal. After the first detection current signal and the second detection current signal are preprocessed, respectively performing time integration on the preprocessed first detection current signal and the preprocessed second detection current signal so as to calculate the electric quantity value of the specific ions adsorbed by the specific ion detection sensor; taking the absolute value of the calculated electric quantity value, and calculating the average value of the specific ion electric quantity according to the cycle times of outputting a charging instruction and a discharging instruction; and calculating the concentration information of the specific ions in the solution to be detected according to the average value of the specific ion electric quantity.
In this embodiment, the hardware components of the central processing module 11 include: the system comprises a first processor, a first memory, a first transceiver, a first communication interface and a first system bus; the first memory and the first communication interface are connected with the first processor and the first transceiver through a first system bus and complete mutual communication, the first memory is used for storing computer programs, the first communication interface is used for communicating with other equipment, and the first processor and the first transceiver are used for running the computer programs, so that the central processing module 11 performs the functions of receiving detection current signals generated by the sensing module and analyzing the detection current signals so as to detect concentration information of specific ions in the solution to be detected.
The hardware components of the control unit 121 include: a second processor, a second memory, a second transceiver, a second communication interface, and a second system bus; the second memory and the second communication interface are connected to the second processor and the second transceiver through a second system bus to complete communication therebetween, the second memory is used for storing a computer program, the second communication interface is used for communicating with other devices, and the second processor and the second transceiver are used for running the computer program, so that the control unit 121 performs a function of analyzing the detection current signal to detect concentration information of specific ions in the solution to be detected.
The above-mentioned system bus may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The system bus may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one thick line is shown, but this does not mean that there is only one bus or one type of bus. The communication interface is used for realizing communication between the database access device and other equipment (such as a client, a read-write library and a read-only library). The memory may include a Random Access Memory (RAM), and may further include a non-volatile memory (non-volatile memory), such as at least one disk memory.
The processor may be a general-purpose processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; the integrated circuit may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic device, or discrete hardware components.
In summary, the specific ion detection system of the present invention directly measures the concentration of each specific ion in the liquid substance by using an electrochemical method in combination with the solid electrode, and has the advantages of accurate and stable data, large measurement range and high measurement precision. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (8)
1. A system for detecting a specific ion, comprising:
the central processing module is used for sending a detection instruction aiming at the specific ions;
the sensing module is used for receiving the detection instruction and generating a detection current signal formed by specific ions in the solution to be detected according to the detection instruction; the sensing module includes:
the control unit is used for receiving the detection instruction and outputting a charging instruction or a discharging instruction according to the detection instruction;
the measurement unit is used for generating a first detection current signal formed by specific ions adsorbed by the measurement unit when the control unit starts to charge the measurement unit when the charging instruction is received; or when receiving the discharge instruction, generating a second detection current signal formed by specific ions desorbed from the measurement unit after the measurement unit starts to discharge; the measuring unit comprises a first current collector, a second current collector and a measurer; the first current collector and the second current collector are used for forming connection between the control unit and the measurer, the first current collector is arranged on the specific ion selection electrode in the measuring unit, and the second current collector is arranged on the counter electrode in the measuring unit; the counter electrode is of opposite polarity to the particular ion-selective electrode; a liquid flow channel for loading the solution to be detected is arranged between the specific ion selective electrode and the counter electrode; the specific ion selective electrode is sequentially provided with a conductive substrate, a carbon-based material layer and a specific ion selective film from top to bottom; the other surface of the specific ion selective film is attached to one surface of the carbon-based material layer, and the other surface of the carbon-based material layer is attached to one surface of the conductive substrate; the specific ion selective membrane is used for adsorbing the specific ions from the solution to be detected and repelling other ions with the polarity opposite to that of the specific ions when the control unit charges the measuring unit; the number of the specific ions adsorbed on the specific ion selective electrode is used as the number of the specific ions in the solution to be detected; the carbon-based material layer comprises activated carbon and/or carbon nanotubes;
the sensing module analyzes the first detection current signal and the second detection current signal to detect the concentration information of specific ions in the solution to be detected; or the central processing module receives the first detection current signal and the second detection current signal generated by the sensing module, and analyzes the first detection current signal and the second detection current signal to detect the concentration information of the specific ions in the solution to be detected.
2. The ion-specific detection system of claim 1,
when the specific ion selective film adsorbs specific ions, a first ion current signal is generated between the specific ion selective electrode and the counter electrode, the amplitude of the first detection current signal is the same as that of the first ion current signal, and the direction of the first detection current signal is opposite to that of the first ion current signal;
when the specific ion selective film desorbs specific ions, a second ion current signal is generated between the specific ion selective electrode and the counter electrode, and the second detection current signal and the second ion current signal have the same amplitude and opposite directions.
3. The system according to claim 2, wherein the control unit integrates the first detection current signal and the second detection current signal with time after the measurement unit generates the first detection current signal or the second detection current signal, respectively, to calculate an electric quantity value of the specific ion adsorbed by the specific ion selective membrane; taking the absolute value of the calculated electric quantity value, and calculating the average value of the specific ion electric quantity according to the cycle times of outputting a charging instruction and a discharging instruction; and calculating the concentration information of the specific ions in the solution to be detected according to the average value of the specific ion electric quantity.
4. The system of claim 3, wherein the control unit is further configured to convert the concentration information of the specific ions in the solution to be detected into a data format required by the central processing module, and transmit the data format.
5. The system of claim 1, wherein the control unit is electrically connected to a first current collector disposed on the ion-selective electrode in the measurement unit and a second current collector disposed on the counter electrode in the measurement unit to form a connection between the control unit and the measurement unit.
6. The system of claim 1, wherein the control unit converts the first or second detection current signal generated by the measurement unit into a data format required by the central processing module and transmits the converted signal;
after the central processing module receives the first detection current signal or the second detection current signal, respectively performing time integration on the first detection current signal and the second detection current signal to calculate the electric quantity value of the specific ions adsorbed by the specific ion selective film; taking the absolute value of the calculated electric quantity value, and calculating the average value of the specific ion electric quantity according to the cycle times of outputting a charging instruction and a discharging instruction; and calculating the concentration information of the specific ions in the solution to be detected according to the average value of the specific ion electric quantity.
7. The system according to claim 6, wherein the control unit is further configured to perform a subsequent processing on the detected concentration information; or the central processing module is further used for preprocessing the first detection current signal or the second detection current signal transmitted by the sensing module.
8. The ion-specific detection system of claim 1, wherein the central processing module is further configured to output the detection instruction to the measurement unit cyclically with a preset detection period.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711157691.6A CN109813759B (en) | 2017-11-20 | 2017-11-20 | Specific ion detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711157691.6A CN109813759B (en) | 2017-11-20 | 2017-11-20 | Specific ion detection system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109813759A CN109813759A (en) | 2019-05-28 |
| CN109813759B true CN109813759B (en) | 2022-03-22 |
Family
ID=66598496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711157691.6A Active CN109813759B (en) | 2017-11-20 | 2017-11-20 | Specific ion detection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109813759B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020232677A1 (en) * | 2019-05-22 | 2020-11-26 | 上海观流智能科技有限公司 | Ion-selective electrode, ion detection sensor and ion detection system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101144791A (en) * | 2007-09-07 | 2008-03-19 | 张祥成 | Ion selective solid plane gold electrode sensing chip and its production method |
| CN102914582A (en) * | 2012-10-11 | 2013-02-06 | 山东大学 | Voltammetric sensor plated with conductive polymer nanometer film and preparation method thereof |
| CN103278551A (en) * | 2013-04-26 | 2013-09-04 | 浙江大学 | Active carbon double-electrode system-based heavy metal electrochemical sensor and method for detection of heavy metals by the active carbon double-electrode system-based heavy metal electrochemical sensor |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI432724B (en) * | 2010-10-18 | 2014-04-01 | Ind Tech Res Inst | Microsystem for analyzing blood |
| CN102507696B (en) * | 2011-10-19 | 2013-12-25 | 浙江大学 | Ion-selective electrode based on graphene electrode and preparation method thereof |
| CN105334255A (en) * | 2015-10-23 | 2016-02-17 | 吴国清 | Calcium ion selective membrane and preparation method thereof |
-
2017
- 2017-11-20 CN CN201711157691.6A patent/CN109813759B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101144791A (en) * | 2007-09-07 | 2008-03-19 | 张祥成 | Ion selective solid plane gold electrode sensing chip and its production method |
| CN102914582A (en) * | 2012-10-11 | 2013-02-06 | 山东大学 | Voltammetric sensor plated with conductive polymer nanometer film and preparation method thereof |
| CN103278551A (en) * | 2013-04-26 | 2013-09-04 | 浙江大学 | Active carbon double-electrode system-based heavy metal electrochemical sensor and method for detection of heavy metals by the active carbon double-electrode system-based heavy metal electrochemical sensor |
Non-Patent Citations (1)
| Title |
|---|
| 《基于伏安型两电极体系的新型检测仪器研究》;李雅卓;《中国学位论文全文数据库》;20141014;23、42-59、73-76 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109813759A (en) | 2019-05-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Saraf et al. | A fascinating multitasking Cu-MOF/rGO hybrid for high performance supercapacitors and highly sensitive and selective electrochemical nitrite sensors | |
| Wang et al. | Simultaneous determination of paracetamol and p-aminophenol using glassy carbon electrode modified with nitrogen-and sulfur-co-doped carbon dots | |
| Yan et al. | Review of progresses on clinical applications of ion selective electrodes for electrolytic ion tests: from conventional ISEs to graphene-based ISEs | |
| CN102507696B (en) | Ion-selective electrode based on graphene electrode and preparation method thereof | |
| Paczosa-Bator | Ion-selective electrodes with superhydrophobic polymer/carbon nanocomposites as solid contact | |
| Zeng et al. | A solid-contact potassium-selective electrode with MoO2 microspheres as ion-to-electron transducer | |
| CN109342522B (en) | Polypyrrole/graphene composite material-based resistance type NH3Sensor, preparation method and application thereof | |
| CN106198676B (en) | A kind of solid contact potassium ion-selective electrode and its preparation and application | |
| Kim et al. | Highly stable potentiometric sensor with reduced graphene oxide aerogel as a solid contact for detection of nitrate and calcium ions | |
| Zeng et al. | Stable Pb2+ ion-selective electrodes based on polyaniline-TiO2 solid contacts | |
| Urbanowicz et al. | A miniaturized solid-contact potentiometric multisensor platform for determination of ionic profiles in human saliva | |
| Jiang et al. | Ordered mesoporous carbon sphere-based solid-contact ion-selective electrodes | |
| CN109813759B (en) | Specific ion detection system | |
| JP2019508698A (en) | Method for calibrating a biomass sensor using impedance spectroscopy and use of a suspension for carrying out the method | |
| Niu et al. | Ag@ Ni3 (BTC) 2 microspheres showing high electrochemical activity and their application as supercapacitors and electrochemical sensors | |
| WO2017150107A1 (en) | Ion concentration measuring device and ion concentration measuring method | |
| DK145317B (en) | HALOGENSENSITIVE ELECTRODE AND PROCEDURES FOR MANUFACTURING A SUCH ELECTRODE AND ANY MEMBRANE | |
| Zu et al. | Electrochemical power generation humidity sensor based on WS2 nanoflakes | |
| Xie et al. | Mesopores cellular foam-based electrochemical sensor for sensitive determination of ractopamine | |
| CN109813788B (en) | Ion selective electrode and measurer for detecting ion concentration in liquid substance, and preparation method and application thereof | |
| CN208505958U (en) | Specific ion detection sensor | |
| CN207502455U (en) | A kind of ion selective electrode and measuring appliance of liquid intermediate ion Concentration Testing | |
| Väärtnõu et al. | Electrical double layer and adsorption of iodide ions at the Bi| acetonitrile interface | |
| CN109813789B (en) | Specific ion detection sensor and preparation method thereof | |
| WO2020232677A1 (en) | Ion-selective electrode, ion detection sensor and ion detection system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20201217 Address after: Room 205, West Zone, 2 / F, No. 707, Zhangyang Road, China (Shanghai) pilot Free Trade Zone, Pudong New Area, Shanghai, 200120 Applicant after: Shanghai Bozhong Guanche Intelligent Technology Co.,Ltd. Address before: 200000 Pudong New Area, Shanghai, China (Shanghai) free trade trial area, No. 3, 1 1, Fang Chun road. Applicant before: SHANGHAI GUANLIU INTELLIGENT TECHNOLOGY Co.,Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |