CN208013137U - A kind of domestic water detection device - Google Patents
A kind of domestic water detection device Download PDFInfo
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- CN208013137U CN208013137U CN201820091676.XU CN201820091676U CN208013137U CN 208013137 U CN208013137 U CN 208013137U CN 201820091676 U CN201820091676 U CN 201820091676U CN 208013137 U CN208013137 U CN 208013137U
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Abstract
The utility model discloses a kind of domestic water detection device.The device includes examining pond, electrod-array, reference electrode and comparison electrode.Examine the airtight chamber for being equipped in pond and capable of accommodating domestic water to be measured；The liquid injection port with chamber is provided with above detection cell, for being put into domestic water to be measured；The liquid outlet with chamber is provided with below detection cell, and the liquid outlet is equipped with removable seal plug, the outflow for liquid after detecting.Two are equipped in chamber by the fixed electrode of electrode support, respectively reference electrode and comparison electrode, electrode is infiltrated in chamber liquid but does not contact bottom of chamber and cavity wall vertically.The cavity bottom is equipped with the electrod-array of four-way, the working electrode as the utility model.The utility model is easy to operate, and device miniaturization measures precisely, precision can reach 1 × 10‑5Mol/L is fully met needed for domestic water detection.
Description
Technical field
The utility model belongs to technical field of electrochemical detection, is related to domestic water detection device.
Background technology
Copper is one of important minor metallic element necessary to plant and animal body, is that human body needs stringent control
The trace element of content.Under normal concentration, the Cu in organism2+Maintain the normal operation of various physiological functions.However,
In higher or lower concentration, disease all may result in, the angiocardiopathy of copper and human body is closely bound up, if in vivo
Cu2+The diseases such as content is too low to be likely to result in muscular degeneration of heart, cardiac enlargement, blood vessel die down.Certain Cu2+If put aside in vivo
It endangers also very big caused by crossing multipair human body, organ can be caused to damage, such as liver toxicity etc..
Cu in domestic water2+It is excessively high to lead to serious neurogenic disease.It is promulgated by Environmental Protection Agency (EPA)
The standard of copper content is 1.3ppm (~2 × 10 in domestic water-4mol/L).In recent years, industrial fast development makes heavy metal
Element such as copper, lead is accumulated in water and soil too much, is polluted the environment, and health is damaged.Therefore, to heavy metal
The detection and analysis of ion are all widely paid close attention to by people always.
Currently, to Cu2+Determination method mainly have atomic absorption spectrography (AAS), visible spectrophotometry, colorimetric analysis
Method and electrochemical process etc..In these methods, colorimetric analysis is although easy to operate, operator is required it is relatively low, but measure
Precision is relatively low, and measurement result is inaccurate.But copper ion detector product is more single currently on the market, mostly uses photoelectron ratio greatly
Color testing principle replaces traditional optical colorimetry using micro computer photoelectron colorimetric detection principle, and such instrumentation is simple,
But Monitoring lower-cut is higher, is basically used for large, medium and small type water factory and industrial and mining enterprises, life or industrial water quality ion concentration inspection
It surveys, is not used to the detection of domestic water.On the market temporarily do not find also commercialization using electrochemistry as the copper of testing principle
Ion detection instrument.
Utility model content
To solve the above problems, the purpose of this utility model is to provide a kind of domestic water detection device.
The purpose of this utility model is realized by the following technical solution：
Utility model device includes examining pond, electrod-array, reference electrode and comparison electrode.
The airtight chamber of domestic water to be measured can be accommodated by being equipped in the inspection pond；Detection cell top is provided with and chamber
Liquid injection port, for being put into domestic water to be measured；The liquid outlet with chamber, and the liquid are provided with below detection cell
Outlet is equipped with removable seal plug, the outflow for liquid after detecting.
Two are equipped in the chamber by the fixed electrode of electrode support, respectively reference electrode and comparison electrode, electricity
It is extremely infiltrated on vertically in chamber liquid but does not contact bottom of chamber and cavity wall.The cavity bottom is equipped with the electrod-array of four-way, makees
For the working electrode of the utility model.
The electrod-array of the four-way is to be provided with equally distributed four at a cylindrical electrode structure edge to lead to
Hole, and side is open outwardly for four through-holes, to constitute four centrosymmetric electrode accesses；Four electrode accesses are for examining
Survey different four kinds of micro- copper ions, dobutamine, nitrobenzene, catechols in domestic water to be detected；
The electrod-array of the four-way is the glass-carbon electrode that surface is equipped with electrochemical catalysis layer.Wherein electrochemical catalysis
It is to crimp tube body by the graphite linings that carbon atom is formed that layer, which uses multi-walled carbon nanotube material, the material, and pipe shaft is by each carbon
The six-membered ring structure that nanotube and three carbon atoms on side are formed is constituted, and can be obtained by buying.
The reference electrode is Ag/AgCl electrodes；
The comparison electrode is platinum electrode；
Three electrodes are connected with electrochemical test system, and electrochemical test system is examined by the electrochemical method of existing maturation
Survey four kinds of microelement concentrations in solution in pond.
It has the beneficial effect that：
The utility model is easy to operate, and device miniaturization measures precisely, precision can reach 1 × 10-5Mol/L, completely
Meet needed for domestic water detection, and the array polarizing electrode of multichannel greatly improves detection efficiency.
Description of the drawings
Fig. 1 is the structural schematic diagram of utility model device；
Contrast on effect of the Fig. 2 for bare glassy carbon electrode and the glass-carbon electrode of multi-walled carbon nanotube modification in copper ion solution
Figure；
Fig. 3 is anti-interference experimental result of the glass-carbon electrode of multi-walled carbon nanotube modification in copper ion solution；
Fig. 4 is the triangular pulse voltage applied in electrochemical method used in utility model device；
Fig. 5 is obtained current -voltage curve in utility model device；
Fig. 6 is the current -voltage curve that utility model device obtains in the copper ion solution of various concentration gradient；
Fig. 7 is peak current-copper ion concentration standard curve used in utility model device.
Specific implementation mode
With reference to specific embodiment and attached drawing, the present invention is described in further detail.
Fig. 1 is the structure chart of the micro copper ion device for fast detecting of novel array.Referring to Fig.1, the utility model is micro
Copper ion device for fast detecting include electrode support (2.1), detection cell (2.2), electrod-array (2.3), reference electrode (2.4) and
Comparison electrode (2.5).Have the chamber that can accommodate ionic liquid in the middle part of detection cell (2.2), examine have among pond (2.2) two by electricity
The fixed electrode (2.4/2.5) placed vertically of pole holder (2.1), electrode (2.4/2.5) are infiltrated on vertically in chamber (2.2)
It is single in ionic liquid not contact bottom of chamber and cavity wall.The cavity bottom is equipped with the electrod-array (2.3) of four-way as work electricity
Pole.Ionic liquid in the chamber (2.2) is domestic water to be measured.
The electrod-array of the four-way is to be provided with equally distributed four at a cylindrical electrode structure edge to lead to
Hole, and side is open outwardly for four through-holes, to constitute four centrosymmetric electrode accesses；Four electrode accesses are for examining
Survey different four kinds of micro- copper ions, dobutamine, nitrobenzene, catechols in domestic water to be detected；
The electrod-array of the four-way is the glass-carbon electrode that surface is equipped with electrochemical catalysis layer.Wherein electrochemical catalysis
It is to crimp tube body by the graphite linings that carbon atom is formed that layer, which uses multi-walled carbon nanotube material, the material, and pipe shaft is by each carbon
The six-membered ring structure that nanotube and three carbon atoms on side are formed is constituted, and can be obtained by buying.
Reference electrode (2.4) is saturation silver/silver chloride electrode.Comparison electrode (2.5) is platinum electrode.Three-electrode system is logical
It crosses numerical control connecting line group (3) with electrochemical test system (1) to be connected, can be studied by electrochemical method molten in cavity (2.2)
Four kinds of microelement concentrations in liquid.
Since the unique One-dimensional Quantum structure of multi-walled carbon nanotube makes it have preferable electric conductivity and electrochemical catalysis.
Redox catalysis property is one of the important electrochemical catalysis property of carbon nanotube inherently, and end and side wall exist
Five or heptatomic ring defect, these special positions under certain conditions, have spy because of its special structure to specified reaction
Different catalytic action.Exactly because therefore the utility model multi-walled carbon nanotube specific catalytic ability, is selected and is modified
Material.Contrast test proves that self-assembling electrode is compared with traditional glass-carbon electrode, as shown in Fig. 2, multi-walled carbon nanotube modification
Glass-carbon electrode is compared spike potential with bare glassy carbon electrode and is not changed, but the peak current of Multiwalled Carbon Nanotubes Modified Electrode is naked electricity
Three times of pole test result show that the glass-carbon electrode of multi-walled carbon nanotube modification has better redox catalytic performance.
Curve 1 in Fig. 3 is CV scanning result of the autonomous loading electrode in the copper ion solution without chaff interferent, and curve 2 is autonomous dress
Electrode is being added higher than the CV scanning results in the potassium ion of 500 times of copper ion concentration and the copper ion solution of sodium ion, can
To find out that curve 1 and 2 spike potential of curve do not change, there is the curve of chaff interferent only to generate certain influence in right side graph,
But not generating Interference Peaks influences experimental result.Experiment shows that the modified electrode repeatability and anti-interference are preferable.Reference electrode
For Ag/AgCl electrodes.Comparison electrode is platinum electrode.
The utility model three-electrode system passes through certain connection type (belonging to routine techniques) and electrochemical test system
It is connected, the micro copper ion concentration in detection cell in solution can be studied by electrochemical method (belonging to routine techniques).It is described
Electrochemical test system (1) includes computer (1.1), electrochemical workstation (1.2) and power supply (1.3).Wherein electrochemical operation
Standing, (1.2) are interior to be equipped with potentiostat, Two-channel High-speed Data Acquisition and controller.Three-electrode system and potentiostat are examined
It surveys end to be connected, controller converts digital model to voltage signal by analog-digital converter and controls potentiostat work, the perseverance
Potentiometer is connected with the data collecting system in electrochemical workstation, and data collecting system is by analog-digital converter by voltage signal
It is converted into digital signal and is sent to numerical control module；Glucose current equation traffic filter is equipped in the data collecting system with multistage to believe
Number gain；The controller is connected by serial ports with computer.The CHI660E of Shanghai Chen Hua may be used in electrochemical workstation.
The electrochemical method can be cyclic voltammetry.Cyclic voltammetry is a kind of by studying electric current, voltage and electricity
Relationship between the electrical parameters such as resistance carrys out a kind of method of the parameter of another difficult detection of comparison in indirect determination system.This practicality is new
Type power supply is by applying triangle wave voltage as shown in figure 4, obtaining generating electric current-electricity that reduction reaction obtains since substance obtains electronics
It buckles line, as shown in Figure 5.The copper ion solution for measuring multigroup various concentration gradient obtains corresponding multigroup various concentration gradient
(Cu2+Concentration is followed successively by 7.0 × 10-5、1.0×10-4、2.0×10-4、5.0×10-4、7.0×10-4、1.0×10-3、1.5×
10-3、2×10-3、3×10-3Mol/L the current -voltage curve (Fig. 6) of copper ion solution), further according to obtained electric current-
Voltage song (Fig. 6) line draws peak current-copper ion concentration standard curve (Fig. 7).It thereafter can be according to electric current-electricity of solution to be measured
Line (Fig. 5) of buckling obtains the concentration of copper ion in solution in conjunction with peak current-copper ion concentration standard curve (Fig. 7), to realize
The concentration of copper ion in solution is studied by current -voltage curve.Peak current-copper ion concentration standard curve (Fig. 7) was drawn
Journey will be discussed in detail in embodiment 1 (drafting of peak current-copper ion concentration standard curve) below.
The course of work：
Domestic water to be detected is injected by water filling port in chamber (2.2), three-electrode system passes through numerical control connecting line
Group (3) is connected with electrochemical test system (1), and electrod-array is as working electrode connection electrochemical operation system anode, ginseng
Electrochemical operation system cathode is connected with comparison electrode than electrode, test chamber (2.2) interior solution is distinguished by cyclic voltammetry
In four kinds of microelement concentrations.
Each access needle selects different voltage and sweep speed to carry out cyclic voltammetry scan different trace elements.It uses
The detection speed of 120mv/s detects the concentration of copper ion in solution to the cyclic voltammetry scan of solution progress -0.6-0.6V；Make
The cyclic voltammetry scan of 0.0-1.2V is carried out to solution with the detection speed of 90mv/s to detect the dense of dobutamine in solution
Degree；Nitrobenzene in solution is detected to the cyclic voltammetry scan of solution progress -0.6--1.0V using the detection speed of 50mv/s
Concentration；Adjacent benzene two in solution is detected to the cyclic voltammetry scan of solution progress -0.2-0.6V using the detection speed of 100mv/s
The concentration of phenol.
It is provided in domestic water examination criteria, the copper ion upper limit is 1.0mg/L, and the utility model Monitoring lower-cut is 1 × 10- 5mol/L；The dobutamine upper limit is 0.02mg/L, and the utility model Monitoring lower-cut is 5 × 10-8mol/L；The nitrobenzene upper limit is
0.017g/L, the utility model Monitoring lower-cut are 8 × 10-8mol/L；The catechol upper limit is 0.5mg/L, the utility model detection
Lower limit is 4 × 10-7Mol/L can meet completely needed for domestic water detection.
Claims (3)
1. a kind of domestic water detection device, it is characterised in that including examining pond, working electrode, reference electrode and comparison electrode；
The airtight chamber of domestic water to be measured can be accommodated by being equipped in the inspection pond；The liquid with chamber is provided with above detection cell
Body inlet；The liquid outlet with chamber is provided with below detection cell, and the liquid outlet is equipped with removable seal plug；
Two are equipped in the chamber by the fixed electrode of electrode support, respectively reference electrode and comparison electrode, electrode is perpendicular
Directly it is infiltrated in chamber liquid but does not contact bottom of chamber and cavity wall；The cavity bottom be equipped with working electrode, and do not contact bottom of chamber and
Cavity wall；
The working electrode is the electrod-array of four-way, which be provided at a cylindrical electrode structure edge
Equally distributed four through-holes, and side is open outwardly for four through-holes, to constitute four centrosymmetric electrode accesses；
The electrod-array of the four-way is the glass-carbon electrode that surface is equipped with electrochemical catalysis layer, and wherein electrochemical catalysis layer is adopted
With multi-walled carbon nanotube material；
The reference electrode is Ag/AgCl electrodes；
The comparison electrode is platinum electrode.
2. a kind of domestic water detection device as described in claim 1, it is characterised in that four of the electrod-array of four-way
Electrode access is for detecting different four kinds of micro- copper ions, dobutamine, nitrobenzene, adjacent benzene in domestic water to be detected
Diphenol.
3. a kind of domestic water detection device as described in claim 1, it is characterised in that three electrodes and electrochemical test system
It is connected, electrochemical test system passes through domestic water in existing electrochemical method detection cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820091676.XU CN208013137U (en) | 2018-01-19 | 2018-01-19 | A kind of domestic water detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820091676.XU CN208013137U (en) | 2018-01-19 | 2018-01-19 | A kind of domestic water detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208013137U true CN208013137U (en) | 2018-10-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820091676.XU Expired - Fee Related CN208013137U (en) | 2018-01-19 | 2018-01-19 | A kind of domestic water detection device |
Country Status (1)
| Country | Link |
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| CN (1) | CN208013137U (en) |
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2018
- 2018-01-19 CN CN201820091676.XU patent/CN208013137U/en not_active Expired - Fee Related
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