CN107121467A - A kind of multi-parameter water quality detection means - Google Patents
A kind of multi-parameter water quality detection means Download PDFInfo
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Abstract
The present invention puies forward a kind of multi-parameter water quality detection means, including multiple electrochemical sensors and measurement process module；The multiple electrochemical sensor is screen printing electrode, for being acquired to different water quality parameters；The measurement process module, the water quality parameter for being gathered to the multiple electrochemical sensor carries out D/A conversions, signal condition, operation result of measurement and A/D conversions.The present invention carries out water quality parameter detection using screen printing electrode, have the advantages that measurement accuracy height, small volume, cost it is low and it is easy change maintenance, solve that existing multi-parameter water quality detection device volume is big, cost is high, electrode is fragile and not easy care the problems such as.
Description
Technical field
The present invention relates to electrochemical analysis and quantitative analysis tech field, examined more particularly, to a kind of multi-parameter water quality
Survey device.
Background technology
Water is basis for the survival of mankind, and the quality and the daily production and living of the mankind of aquatic environment are closely bound up.With
Continuing to develop for China's industrial or agricultural, the pollution to environment such as waste water, waste gas for being produced in industrial and agricultural production, strong influence is arrived
The aquatic environment of human lives' production.Water analysis is to grasp aquatic environment and aquatile Experimental Ecosystem chemokines
Change dynamic important means, to avoid the destruction of the aquatic environment caused by water pollution, it is necessary to which the water quality to water body is entered
Row analysis and detection, and control using effective method and improve water quality, so as to be provided suitably for the daily production and living of the mankind
Aquatic environment.Therefore, the detection to aquatic environment is to ensure mankind's daily life and industrial effective means.
Current electrochemical analysis system, can be according to the electrochemical properties and its changing rule of material in solution, with electricity
Quantitative relation between the electrical quantities such as position, conductance, electric current and electricity and the concentration of measured matter and measure.It is easy with signal
Transmission, easy to automate and serialization and instrument it is simple, it is cheap the features such as, thus environmental monitoring with control,
There is consequence in industry automatic control and on-line analysis field.
Most of water quality detection is detected using electrode sensor to the various parameters in water, mainly by water
With electrode surface material electrochemical reaction occurs for specific ion or molecule, thus cause the voltage that change is produced in detection circuit or
Electric current, reflects specific indexes in water body by detecting the size of voltage or current variation value in circuit.
However, current existing water quality detection equipment, such as dissolved oxygen sensor, conductivity sensor, conductivity sensor
Deng it is most of be all simple function, when being related to multi-parameter detection, it is necessary to be configured to multiple sensors, operation difficulty
Greatly, use cost is high, and the comprehensive analysis easily to water quality causes error；And existing multi-parameter water quality detection device then body
Product is big, inconvenient to carry, and cost is high, and electrode is fragile, not the shortcomings of easy care.
Therefore, in water quality parameter detection, how effectively to overcome the shortcoming of existing multi-parameter water quality sensor, reach
Measurement accuracy is improved, reduction measurement cost turns into present urgent problem to be solved with operation difficulty.
The content of the invention
The present invention provides a kind of multi-parameter water quality detection for overcoming above mentioned problem or solving the above problems at least in part
Device.
There is provided a kind of multi-parameter water quality detection means, including multiple electrochemical sensors according to an aspect of the present invention
And measurement process module；
The multiple electrochemical sensor is screen printing electrode, for being acquired to different water quality parameters；
The measurement process module, for the water quality parameter that is gathered to the multiple electrochemical sensor carry out D/A conversions,
Signal condition, operation result of measurement and A/D conversions.
The present invention proposes multi-parameter water quality detection means, and different water quality parameters is carried out provided with multiple electrochemical sensors
Collection and measurement, the electrochemical sensor is screen printing electrode, can effectively raise the inspection of electrochemical analysis system
Precision is surveyed, has the advantages that measurement accuracy height, small volume, cost are low and easy change is safeguarded, solves existing multi-parameter water quality
Detection device exist volume it is big, inconvenient to carry, cost is high, electrode is fragile and not easy care the problems such as.
Brief description of the drawings
Fig. 1 is a kind of multi-parameter water quality detection means block schematic illustration of the embodiment of the present invention；
Fig. 2 is a kind of multi-parameter water quality detection means block schematic illustration of the embodiment of the present invention；
Fig. 3 is a kind of multi-parameter water quality detection means figure of the embodiment of the present invention；
Fig. 4 is microcontroller architecture schematic diagram described in the embodiment of the present invention；
Fig. 5 is measuring circuit modular structure schematic diagram described in the embodiment of the present invention；
Fig. 6 is screen printing electrode schematic diagram described in the embodiment of the present invention.
Description of reference numerals
1st, host computer, 2, measurement process module, 3, electrode connector, 4, electrochemical sensor, 10, I2C buses row's pin,
11st, housing, 12, wire, 14, cruciform slot screw, 17, USB data line, 21, measuring circuit module, 22, microcontroller, 23, USB
Interface, 24, working station indicator, 41, conductivity electrode, 42, dissolved oxygen electrode, 43, NH3Electrode, 211, D/A moduluss of conversion
Block, 212, measurement module, 213, Signal-regulated kinase, 214, A/D modular converters, 215, analog circuit power supply module, 221,
6MHZ crystal oscillators, 222, USB serial port circuit modules, 223, ram module, 224, microprocessor module, 225,4MHZ it is brilliant
Shake, 226,5V power supply modules, 401, sensitive coat, 402, silver/silver chloride reference electrode, 403, carbon working electrode, 404, carbon
To electrode, 405, insulating barrier, 406, electrode base sheet.
Embodiment
With reference to the accompanying drawings and examples, the embodiment to the present invention is described in further detail.Implement below
Example is used to illustrate the present invention, but is not limited to the scope of the present invention.
As shown in figure 1, a kind of multi-parameter water quality detection means, including multiple electrochemical sensors 4 and measurement process module
2；
The multiple electrochemical sensor 4, is screen printing electrode, for being acquired to different water quality parameters；
The measurement process module 2, the water quality parameter for being gathered to the multiple electrochemical sensor 4 carries out D/A and turned
Change, signal condition, operation result of measurement and A/D are changed.
The present embodiment is acquired and measured to different water quality parameters provided with multiple electrochemical sensors, the electrochemistry
Sensor is screen printing electrode, can effectively raise the accuracy of detection of electrochemical analysis system, with measurement accuracy it is high,
Small volume, cost it is low and it is easy change the advantage safeguarded, solve that the volume that existing multi-parameter water quality detection device is present is big, take
Band inconvenience, cost are high, electrode is fragile and not easy care the problems such as.
In one embodiment, a kind of multi-parameter water quality detection means also includes electrode connector 3, and the electrode connects
Device 3 is connect, for connecting the multiple electrochemical sensor 4 and the measurement process module 2.
A kind of multi-parameter water quality detection means described in the present embodiment, is generally also connected with host computer 1 in actual applications, described
Host computer 1, the measurement process module 2 is connected by USB interface, and the measurement data for the measurement process module carries out real
When show and store.
As shown in Fig. 2 in one embodiment, the electrochemical sensor 4 includes conductivity electrode 41, dissolved oxygen electrode
42 and NH3At least two in electrode 43；
The conductivity electrode 41 is used to gather conductivity value parameter in water, and the dissolved oxygen electrode 42 is used to gather in water
Dissolved oxygen parameter, the NH3Electrode 43 is used to gather the NH in water3Parameter.
Three kinds of different water quality parameter acquisition electrodes are provided in the present embodiment, different electrodes is used to measure different water
Matter parameter.During actual implementation, conductivity electrode 41 and dissolved oxygen electrode 42, or the He of dissolved oxygen electrode 42 are used as needed
NH3Electrode 43, or NH3Electrode 43 and conductivity electrode 41, or these three electrodes are used simultaneously.But the present embodiment is not limited to
This several electrode is only set, needs are applied according to specific, the present embodiment can be added on the basis of existing for measuring other
The electrode of water quality parameter, so that device of the present invention can be more extensive with application.
As shown in Fig. 2 in one embodiment, the measurement process module 2 includes measuring circuit module 21 and microcontroller
Device 22；
The measuring circuit module 21, connects the multiple electrochemical sensor 4 by the electrode connector 3, is used for
Control the multiple electrochemical sensor 4 to carry out water quality parameter collection, obtain the water quality that the multiple electrochemical sensor 4 is gathered
Parameter carries out signal condition, measurement and A/D conversions, obtains the data signal of water quality parameter；And send the data signal
To the microcontroller 22；
The microcontroller 22, is connected by I2C buses with the measuring circuit module 21, for electric to the measurement
Road module 21 sends the control command of water quality parameter collection, carries out calculation process to the data signal received, obtains water
Matter parameter measurements, and the water quality parameter measurement result is sent to the host computer 1；
The workflow of the present embodiment is：The measuring circuit module 21 detects that water quality is joined by the screen printing electrode
Number, and electric signal progress quantitative measurment is converted into, obtained data signal is measured by I2C bus transfers to the micro-control
Device 22 processed, the microcontroller 22 can be controlled to different water quality parameter measurements, and be realized and institute by USB data line
State the data transfer between host computer 1 and storage；The host computer 1 is by USB data line respectively to the He of microcontroller 22
Measuring circuit module 21 is powered.
In one embodiment, the measurement process module 2 also includes working station indicator 24；
The working station indicator 24, the work for indicating the measuring circuit module 21 and the microcontroller 22
State.
In one embodiment, the working station indicator includes the first LED, the second LED and the 3rd LED；
First LED, for indicating that it is whether normal that host computer is powered to the measurement process module；
Second LED, for indicating whether the measurement process module is carrying out DATA REASONING；
Whether normal 3rd LED, be connected with host computer for the measurement process module.
In the present embodiment, specifically, can be distinguished by the indicator lamp of different colours different instructions, it is for example red,
Green, yellow three LEDs, carry out indicating operating status, could be arranged to：
Red LED lamp often to electrochemical analysis system power by bright instruction host computer.
Green LED lamp flicker shows that electrochemical analysis system is set up with host computer and is connected that the Chang Liang such as green LED shows
Electrochemical analysis system has been successfully connected with host computer, and green LED etc. does not work, and shows electrochemical analysis system and host computer
Connection failure.
Yellow LED lamp flicker shows that electrochemical analysis system carries out DATA REASONING.
As shown in figure 3, in one embodiment, the screen printing electrode includes electrode base sheet 406, and is arranged on institute
Insulating barrier 405, carbon working electrode 403, silver/silver chloride reference electrode 402 and the carbon on electrode base sheet are stated to electrode 404, it is described
Covered with sensitive coat 401 on carbon working electrode.
In one embodiment, the carbon working electrode 403, silver/silver chloride reference electrode 402 and carbon are logical to electrode 404
The insulating barrier 405 is crossed to be pasted on the electrode matrix 406, and the carbon working electrode 403, silver/silver chloride reference electrode
402 and carbon insulating barrier 405 is exposed to electrode 404 and its respective electrode contacts.
The present embodiment carries out water quality parameter detection using the screen printing electrode, and with low cost, electrode is easily changed, sensitive
Degree is high, and the response time is quick, and repeatability is good, small volume.
In one embodiment, the sensitive membrane coat of the dissolved oxygen electrode 42 uses Ag-iron oxide nanoparticles
Film modified, the NH of sub- sensitivity3The sensitive membrane coat of electrode 43 is film modified using Ag nano-particle sensitivities, the electro conductivity
The sensitive membrane coat of pole 41 is film modified using Pb-oxide nano-particle sensitivities.
Three kinds of electrodes of the present embodiment are screen printing electrode, the dissolved oxygen electrode, the NH3Electrode and the electricity
Conductance electrode is in addition to the sensitive material that sensitive membrane coat is used is different, and its basic structure is all identical.Due to sensitive membrane coating
The sensitive material that layer is used is different, and can be acquired measurement to different water quality parameters.
In one embodiment, the screen printing electrode is prepared by following steps：
S1, prepare silver/ferric oxide nano particles compound；
S2, by silver/ferric oxide nano particles compound drop coating in the carbon working electrode surface of screen printing electrode, be made molten
Solve oxygen electrode.
Specifically, the step S1 includes：
S11, prepare nano-Ag particles；
Detailed process is：Using silver nitrate as silver-colored source, sodium borohydride is used as reducing agent, 20wt% polyvinylpyrrolidine
Ketone (PVP) is surfactant, is placed in insulating box, constant temperature one hour, is obtained containing the molten of nano-Ag particles at 130 DEG C
Liquid；
The solution containing nano-Ag particles of preparation is placed in a centrifuge into rotating speed to centrifuge 10 minutes for 1000rpm,
Washed afterwards with acetone soln three times, remove the organic impurities in silver nanoparticle solution；
S12, the nano-Ag particles of preparation are added to Fe (NO3)3In sol-gel solution, and mixture is placed in constant temperature
In case at 70 DEG C, gentle agitation is centrifuged 10 minutes by centrifuge 1000rpm after 2 hours, obtains silver/ferric oxide nano
Particle composite.
Step S2 is specifically included：Cleaning web is printed electrode, and the silver of preparation/ferric oxide nano particles compound is added to
In ethanol and Nafion (perfluorinated sulfonic acid) suspension；Mixed suspended drop-coated is taken to the carbon working electrode of screen printing electrode
Surface, is placed in and dries 30min at room temperature；With ultrapure water carbon working electrode surface, carbon working electrode surface will be not fixed to
Silver/ferric oxide nano particles compound rinse out, obtain the screen printing type dissolved oxygen electricity of silver/ferric oxide nano particles modification
Pole.
As shown in figure 4, in one embodiment, the measuring circuit module 21 includes D/A modular converters 211, measurement mould
Block 212, Signal-regulated kinase 213 and A/D modular converters 214；
The D/A modular converters 211 are connected 212 with the measurement module, and signal described in the A/D modular converters 214 is adjusted
Reason module 213 is connected；
The measurement module 212 passes through the electrode connector 3 and the screen printing with the Signal-regulated kinase 213
Brush electrode 4 is connected；
The D/A modular converters 211 are connected the microcontroller 22 respectively with the A/D modular converters 214；
The D/A modular converters 211, the data signal for the microcontroller to be produced is converted into analog electrical signal,
It is applied to the working electrode of the multiple electrochemical sensor；
The measurement module 212, for the electrification for the different quality parameter for detecting the multiple electrochemical sensor
Learn signal and be converted into analog electrical signal；
The Signal-regulated kinase 213, for being modulated to the analog electrical signal；
The A/D modular converters 214, for the analog electrical signal after modulation to be converted into data signal, and it is total by I2C
The data signal is sent in described microcontroller by line.
It is preferred that, the chip model of the D/A modular converters 211 is DAC121C085, the A/D modular converters 214
Chip model is MCP3424.
In the present embodiment, the D/A modular converters 211 use DAC121C085 chips, and the chip is one and connect based on I2C
Mouthful 12 bit digitals/analog-converted chip, have the advantages that high accuracy, it is linear, by I2C interfaces, microprocessor module 22 can
To set the address of the chip, the D/A modular converters 211 are controlled to produce different analog waveforms.The D/A modular converters
211 analog signals produced are applied to the carbon of screen printing electrode 4 on electrode by measurement module 212.Measurement module 212 with
Screen printing electrode 4 is connected, measurement dissolved oxygen, NH3, the water quality parameter such as electrical conductivity.Meanwhile, Signal-regulated kinase 213 is by silk screen
4 analog signal that produces of working electrode end of printing electrode is amplified filtering, and by the analog signal feeding modulus after processing
In A/D modular converters 22.
The A/D modular converters 214 are using high accuracy, the modulus conversion chip of 18 four road Differential Inputs of low noise
MCP3424.The A/D modular converters 214 are and total by I2C by the analog signal conversion digital signal of Signal-regulated kinase 213
Tie interface feeding microprocessor module 22.
In the present embodiment, the measuring circuit module 21 also includes analog circuit power supply module 215, for for the measurement
The modules of circuit module 21 are powered.
As shown in figure 5, in one embodiment, the microcontroller 22 includes 4MHz crystal oscillators 225, the Wei Chu being sequentially connected
Manage device module 224, ram module 223, USB serial port circuits module 222 and 6MHz crystal oscillators 221, the random access memory
Module 223 is also connected with the USB serial port circuits module 222.
The microprocessor module 224, for being controlled to the collection of water quality parameter, storage, upload；
The 4MHz crystal oscillators 225 are the clock source of the microprocessor module 224, the 6MHz crystal oscillators 221, the USB
The clock source of serial port circuit module 222；
The ram module 223, for the electrical conductivity gathered to the measuring circuit module 21, dissolved oxygen, NH3
The data signal of parameter is stored.
It is preferred that, the microprocessor module is 8 CMOS microcontroller chips ATMEGA16L, the random access memory
The chip model of module is 93LC46.
In the present embodiment, the microcontroller 22 also include 5V power supply modules 226, the 5V power supply modules 226 respectively with
The microprocessor module 224, random storage module 223 and USB serial port circuits module 222 are connected, for be described micro-
Processor module 224, random storage module 223 and USB serial port circuits module 222 provide the power supply of 5V voltages.
In the present embodiment, for the integrated level of strengthening system, using 8 CMOS microcontrollers of low-power consumption of atmel corp
Chip ATMEGA16L.ATMEGA16L is the powerful single-chip microcomputer of One function, is that many embedded Controls are applied there is provided flexible
And the solution of low cost, due to its advanced instruction set and single clock cycle time for each instruction, ATmega16L number
1MIPS/MHz is up to according to throughput, so as to contradiction of the relieving system between power consumption and processing speed.ATmega16L has
There are 10,8 tunnel ADC, 8 single ended channels, 2 differential paths with programmable-gain；28 general purpose working registers；6K
The In-System Programmable Flash of byte；The EEPROM of 512 bytes；The on-chip SRAM of 1K bytes and with individual sheets vibrate
Programmable watchdog timer of device etc..ATMEGA16L these features make it that circuit system is more integrated, minimize.
In the present embodiment, in the running of system, 5V power supply modules 226 are to microprocessor module 224, USB serial ports
Circuit module 222, random storage module 223 are powered；Microprocessor module 224 by internal processes to data acquisition, deposit
Storage, upload are controlled.Conversion chip model FT232BL USB serial port circuits module 222 mainly realizes microprocessor module
Data between 224 and host computer 1 receive with sending；Model 93LC46 random storage module 223 is mainly used in realizing micro-
Data storage and reading between processor module 224 and host computer 1.
As shown in fig. 6, in one embodiment, a kind of multi-parameter water quality detection means also includes：Housing 11, wire 12,
Usb 13, cross pattern screw 14, I2C buses row's pin 16.
Wherein, microcontroller 22, measuring circuit module 21, working station indicator 24 is placed in electrochemical analysis system shell
In body 11, and it is fixed on by four cross pattern screws 14 in electrochemical analysis system housing 11；Microcontroller 22 and measurement electricity
Road module 21 is connected and fixed by I2C buses row's pin；USB data line 17 is connected by usb 13 with microcontroller 33；
Electrode connector 3 is connected with measuring circuit module 21；The material that described housing 11 is used is polymethyl methacrylate, i.e.,
Lucite, with high transparency, the flicker state of working station indicator 24 can be directed through housing 11 and observe, work
Make status indicator lamp 24 by wire 12 with microcontroller 22 to be connected, and inlay the measuring circuit module 21 described in being fixed on
On.
It is specifically described below by a kind of multi-parameter water quality detection means described in the present embodiment to measure dissolved oxygen, NH3, electricity
The application method of conductance：
(1) host computer is connected
The measurement process module 2 is connected with host computer 1 using USB connecting lines 17, in working station indicator 24
Red LED lamp Chang Liang, green LED lamp is first flashed, afterwards Chang Liang, and the measurement process module 2 is successfully connected with host computer 1；
(2) calibration equation
(1) it is conductivity electrode 41, dissolved oxygen electrode 42, NH by screen printing electrode 43The electrode tip of electrode 43 is inserted respectively
Entering electrode connector 3, and ensure that sensitive membrane coating zone is exposed in the outside of electrode connector 3 and ensures that sensitive membrane coating zone is complete
Enter entirely in solution to be measured；
(2) selection of operating voltage：Dissolved oxygen screen printing electrode is placed in closed beaker, conductance is housed in beaker
Rate is 7.4 phosphate buffer；Oxygen and argon gas are at the uniform velocity injected in buffer solution into beaker simultaneously, makes oxygen/argon ratio
Example is maintained 10 minutes 0,0.2,0.5,0.8,1 respectively；At the same time, the measurement process module 2 is set by host computer 1
Work potential is with 100mV/s sweep speed, potential range：- 1.5V~+1.5V, with the time to dissolved oxygen screen printing electrode 8
Progress is multiple to be repeatedly scanned with, and by 1 record current of host computer-potential (I-U) cyclic voltammetry curve, if electric current-potential
(I-U) cyclic voltammetry curve can not complete complete volt-ampere circulation between potential range -1.5V~+1.5V, then need logical
The work potential scope that host computer 1 resets the measurement process module 2 is crossed, until resulting electric current-potential (I-U) is followed
Ring volt-ampere curve is complete.Voltage where the reduction peak value of obtaining current-potential (I-U) cyclic voltammetry curve, is described
Electrochemical workstation detect dissolved oxygen parameter operating voltage Vo2.Electrical conductivity, NH3The operating voltage of parameter is chosen and dissolved oxygen
The step of operating voltage is chosen is consistent, and the volumetric solution used is different：NH3Operating voltage VNH3During selection, using NH3Gas with
Argon gas is at the uniform velocity injected in closed beaker simultaneously, oxygen/argon ratio is maintained 10 minutes 0,0.25,0.50,0.75,1 respectively；
Electrical conductivity is using 0,10,20,30,50m S/cm KCL titers choose operating voltage VEC。
(3) calibration equation：The data that step (1) measurement is obtained are transferred to host computer 1 by described microcontroller 22, lead to
Host computer 1 is crossed, is respectively obtained in operating voltage V02、VNH3、VECElectric current-water quality survey parameter concentration (I-C) curve, and using most
Small square law is to resulting electric current --- and water quality parameter concentration (I-C) curve carries out linear fit, obtains electric current-water quality parameter
The linear equation of concentration (I-C) curve, the linear equation is the calibration equation of water quality parameter to be measured；
(4) calibration equation is write in microprocessor 22 and preserved by host computer 1 respectively.
(3) dissolved oxygen, NH3, conductivity parameters measurement
(1) it is conductivity electrode 41, dissolved oxygen electrode 42, NH by screen printing electrode 43Electrode 43 inserts electrode company respectively
Connect device 3, and ensure that sensitive membrane coating zone is exposed in the outside of electrode connector 3, and ensure sensitive membrane coating zone completely into
Into solution to be measured；
(2) measurement module 212 is set measuring circuit is operated under constant voltage mode by host computer 1, constant voltage mode is pair
The constant voltage of load output.Measurement module 212 is set by host computer 1, respectively in operating voltage V02、VNH3、VECUnder to molten
Solve oxygen, NH3, electrical conductivity measure, now, the flicker of yellow LED lamp in working station indicator 24；
(3) dissolved oxygen, NH3, conductivity measurement data storage：Dissolved oxygen that measurement module is collected, NH3, electrical conductivity number
Stored, can also be transferred to by USB serial port circuits module 222 to random storage module 223 according to by I2C bus transfers
Host computer 1 is stored.
(4) range is detected
Being limited by supply voltage, the work potential scope of this embodiment multi-parameter water quality measurement apparatus is to the maximum-
2.5V~+2.5V, if in work potential scope -2.5V~+2.5V, in cyclic voltammetric detection process, can obtain complete
Electric current-potential (I-U) cyclic voltammetry curve, then illustrate detection water quality parameter the present invention embodiment detection model
In enclosing；If in the work potential scope, it is impossible to obtain complete electric current-potential (I-U) cyclic voltammetry curve, then illustrate to treat
Maximum detection range of the water quality parameter of detection beyond embodiment of the present invention.
Compared with prior art, it is to realize multiple-quality water parameter the invention provides a kind of multi-parameter water quality monitoring device
The electrochemical analysis system of in situ detection, the advantage is that can be in the multi-parameter water quality monitoring device while setting dissolving
Oxygen, NH3, three kinds of water quality sensors of electrical conductivity solve the problem of existing water quality detection instrument measurement is single.The present invention is using permanent
Die pressing type is measured with constant current mode to dissolved oxygen, NH3, electrical conductivity water quality parameter, is shown, demarcated, calibrated by host computer
Dissolved oxygen, NH3, the conductivity parameters collected, the effective accuracy of detection for improving electrochemical analysis system；The present invention uses silk
Wire mark brush electrode carry out water quality parameter detection, have the advantages that measurement accuracy height, small volume, cost it is low, it is easy change safeguard, solution
Existing multi-parameter water quality detection device has that volume is big, and inconvenient to carry, cost is high, and electrode is fragile, and easy care etc. is not asked
Topic.
In summary, for problem present in existing multiple-quality water parameter measurement equipment, the invention provides one kind
The electrochemical analysis system of multiple-quality water parameter in-situ monitoring can be realized, how diversified with measurement parameter, measurement result can
Lean on, simple to operate, the advantages of electrode is easily changed, safeguarded.
Finally, method of the invention is only preferably embodiment, is not intended to limit the scope of the present invention.It is all
Within the spirit and principles in the present invention, any modification, equivalent substitution and improvements made etc. should be included in the protection of the present invention
Within the scope of.
Claims (8)
1. a kind of multi-parameter water quality detection means, it is characterised in that including multiple electrochemical sensors and measurement process module；
The multiple electrochemical sensor is screen printing electrode, for being acquired to different water quality parameters；
The measurement process module, the water quality parameter for being gathered to the multiple electrochemical sensor carries out D/A conversions, signal
Conditioning, operation result of measurement and A/D conversions.
2. device according to claim 1, it is characterised in that also including for connecting the multiple electrochemical sensor and institute
State the electrode connector of measurement process module.
3. device as claimed in claim 1, it is characterised in that the electrochemical sensor includes conductivity electrode, dissolved oxygen electricity
Pole and NH3At least two in electrode；
The conductivity electrode is used to gather conductivity value parameter in water, and the dissolved oxygen electrode is used to gather the dissolved oxygen in water
Parameter, the NH3Electrode is used to gather the NH in water3Parameter.
4. device as claimed in claim 1, it is characterised in that the measurement process module includes measuring circuit module and microcontroller
Device；
The measuring circuit module, the multiple electrochemical sensor is connected by the electrode connector, described for controlling
Multiple electrochemical sensors carry out water quality parameter collection, obtain water quality parameter and the transmission of the multiple electrochemical sensor collection
To the microcontroller；
The microcontroller, the control command for sending water quality parameter collection to the measuring circuit module, to what is received
The water quality parameter carries out calculation process, obtains water quality parameter measurement result.
5. device as claimed in claim 3, it is characterised in that the screen printing electrode includes electrode base sheet, and is arranged on
Insulating barrier, carbon working electrode, silver/silver chloride reference electrode and carbon on the electrode base sheet is to electrode, the carbon working electrode
On covered with sensitive coat.
6. device as claimed in claim 5, it is characterised in that the carbon working electrode, silver/silver chloride reference electrode and to electrode
It is pasted on by the insulating barrier on the electrode matrix, and the carbon working electrode, silver/silver chloride reference electrode and carbon are to electricity
Pole and its respective electrode contacts expose insulating barrier.
7. device as claimed in claim 5, it is characterised in that the sensitive membrane coat of the dissolved oxygen electrode uses Ag-iron
Oxide nano-particle sensitivities are film modified, the NH3The sensitive membrane coat of electrode is film modified using Ag nano-particle sensitivities, institute
The sensitive membrane coat for stating conductivity electrode is film modified using Pb-oxide nano-particle sensitivities.
8. device as claimed in claim 4, it is characterised in that the measurement process module also includes working station indicator, institute
Working station indicator is stated, the working condition for indicating the measuring circuit module and the microcontroller.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2022116530A1 (en) * | 2020-12-02 | 2022-06-09 | Wuhan academy of agricultural sciences | Heavy metal detector |
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