CN209372747U - A kind of micro-example pH detector - Google Patents
A kind of micro-example pH detector Download PDFInfo
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- CN209372747U CN209372747U CN201920015575.9U CN201920015575U CN209372747U CN 209372747 U CN209372747 U CN 209372747U CN 201920015575 U CN201920015575 U CN 201920015575U CN 209372747 U CN209372747 U CN 209372747U
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- working electrode
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Abstract
The utility model relates to a kind of micro-example pH detectors, including detection display instrument and detecting electrode, usb data capture card is provided on the detection display instrument, the detecting electrode is electrically connected with detection display instrument, the detecting electrode includes working electrode and reference electrode, one end of the working electrode is welded with working electrode conducting wire, the working electrode conducting wire is connect with usb data capture card, the top of the reference electrode is provided with reference electrode conducting wire, the reference electrode conducting wire is connect with usb data capture card, the reference electrode is up big and down small variable diameter cylinder, the working electrode is set to the path mouth side of the reference electrode, the diameter of the working electrode is less than the diameter of the path mouth of the reference electrode.The utility model provides a kind of micro-example pH detector to solve the problems, such as that test sample consumption is big in the prior art, can not detect micro-example pH value.
Description
Technical field
The utility model relates to a kind of micro-example pH detectors.
Background technique
PH value is one of the important parameter in electrochemical field.PH electrode sensor is that research is earliest, most and current
The chemical sensor of comparative maturity.In field of scientific studies such as biomedicines, usual sample is expensive, and the electrode of traditional pH meter
Diameter generally requires more solution, easy consumption sample when measuring pH value of solution in 1cm or so；And works as and need to micro-example
Or the pH value in tiny place, when measuring, traditional pH meter is just unable to measure.
Utility model content
Purpose of the utility model is to solve the consumption of test sample in the prior art greatly, can not detect micro-example pH
The problem of value, provides a kind of micro-example pH detector.
To achieve the above object, the utility model provides following technical solution: a kind of micro-example pH detector, including
Display instrument and detecting electrode are detected, usb data capture card is provided on the detection display instrument, the detecting electrode and detection are aobvious
Show that instrument electrically connects, the detecting electrode includes working electrode and reference electrode, and one end of the working electrode is welded with work electricity
Polar conductor, the working electrode conducting wire are connect with usb data capture card, and the top of the reference electrode is provided with reference electrode and leads
Line, the reference electrode conducting wire are connect with usb data capture card, and the reference electrode is up big and down small variable diameter cylinder, described
Working electrode is set to the path mouth side of the reference electrode, and the diameter of the working electrode is less than the small of the reference electrode
The diameter of diameter mouth.
By using above-mentioned technical proposal, detecting electrode includes working electrode and reference electrode, one end weldering of working electrode
It is connected to working electrode conducting wire, the whole (in addition to the tip contacted with test sample) and working electrode conducting wire and work of working electrode
The a distance for making electrode connection or more is wrapped up by glass cement or other megohmite insulants with fixed function, and electric with reference
Extremely mutually bonding, working electrode conducting wire are connect with usb data capture card, and reference electrode conducting wire is connect with usb data capture card, when
Working electrode and reference electrode are contacted with test sample, and usb data capture card acquires the telecommunications of the potential difference between two electrodes
Number, and collected electric signal is zoomed into the electric signal that can be received, and after carrying out data fitting with matlab software, shape
At the functional relation of potential difference between a pH value and two electrodes, the source code for being converted into solution ph as potential difference is imported
It in labview software, is handled using labview software, the images outputting of voltage and pH value is shown on detection display instrument；
The end portion of working electrode and reference electrode is contacted with test sample, and reference electrode is up big and down small variable diameter cylinder, work
Electrode is set to the path mouth side of the reference electrode, when needing the pH value to tiny place to detect, reference electrode
Path mouth can protrude into tiny place, and protrude into working electrode, will not be blocked, and increase the versatility of product；Work electricity
The diameter of pole is less than the diameter of the path mouth of reference electrode, then the contact area of working electrode and test sample is small, required
Test sample volume is just small, reduces the consumption of test sample, and the electrode area of working electrode is small, high sensitivity, favorable reproducibility.
The utility model is further arranged: the major diameter mouth diameter of the reference electrode is 8.80mm, the reference electrode
Path mouth diameter is 2.54mm, and the diameter of the working electrode is 0.1mm.
By using above-mentioned technical proposal, the upper diameter of reference electrode is greater than the lower diameter of reference electrode, conveniently exists
Detecting electrode is clamped or held using in operating process；The lower diameter of reference electrode is small, can protrude into tiny place, and
It protrudes into, will not be blocked with working electrode, increase the versatility of product；The diameter of working electrode is less than the small of reference electrode
Diameter mouth diameter, facilitating working electrode as reference electrode is brought into, tiny place is detected, and the diameter of working electrode is
0.1mm, it is small with the contact area of test sample, it can sufficiently be contacted with test sample, and only need 3-5 microlitres of sample drop in electrode
The pH value that solution can be measured above avoids the waste of rare, valuable sample.
The utility model is further arranged: the working electrode is the metal iridium wire that surface covers iridium oxide membrane.
By using above-mentioned technical proposal, working electrode is the metal iridium wire that surface is covered with lid iridium oxide membrane, and surface is covered
The metal iridium wire for being stamped iridium oxide membrane is as made of the electrolytic etching in an acidic solution of metal iridium wire.Iridium is that corrosion resistance is most strong
One of metal, it can resist nearly all acid, chloroazotic acid, molten metal, even silicate at high temperature, and stability is high,
It is not easy to react with test sample.
The utility model is further arranged: the reference electrode is Ag/AgCl electrode, and the reference electrode includes that insulation is outer
Shell is set to binding post that insulation crust one end connect with reference electrode conducting wire, is set in insulation crust and connects with binding post
The silver electrode connect and the saturated potassium chloride solution being filled in insulation crust, the silver electrode are soaked in saturated potassium chloride solution
It is interior, chlorination Ag films are covered in the silver electrode, the bottom deposit of the insulation crust 222 has potassium chloride.
By using above-mentioned technical proposal, reference electrode is Ag/AgCl electrode, and Ag/AgCl electrode is molten in post high pressure water
With the solubility of very little, high stability and reversibility in liquid system, and even if in the presence of having hydrogen, electrode
Surface can also be protected well.
The utility model is further arranged: the inlet for injecting solution, the note are provided on the insulation crust
It is arranged on entrance and the matched cork set of inlet.
By using above-mentioned technical proposal, it is provided with the inlet for injecting solution on insulation crust, is covered on inlet
Equipped with the matched cork set of inlet, can the saturated potassium chloride solution in insulation crust be supplemented or be fallen by inlet
Out, cork set is matched with inlet, when cork set is sheathed on inlet, can avoid the solution evaporation in insulation crust 222.
With reference to the accompanying drawing and specific embodiment is described further the utility model.
Detailed description of the invention
Fig. 1 is the overall structure figure of the utility model embodiment；
Fig. 2 is the local structural graph of the utility model embodiment；
Figure label meaning: detection display instrument -1, usb data capture card -11, detecting electrode -2, working electrode -21, work
Make electrode cable -211, reference electrode -22, reference electrode conducting wire -221, insulation crust -222, binding post -223, silver electrode -
224, saturated potassium chloride solution -225, chlorination Ag films -226, potassium chloride -227, inlet -228, cork set -229.
Specific embodiment
This specific embodiment is only the explanation to the utility model, is not limitations of the present invention, ability
Field technique personnel can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but
As long as all by the protection of Patent Law in the scope of the claims of the utility model.
Referring to attached drawing 1-2, present embodiment discloses a kind of micro-example pH detectors, including detection display instrument 1 and detection
Electrode 2 is provided with usb data capture card 11, the detecting electrode 2 and detection 1 Electricity Federation of display instrument on the detection display instrument 1
It connects, the detecting electrode 2 includes working electrode 21 and reference electrode 22, and one end of the working electrode 21 is welded with working electrode
Conducting wire 211, the working electrode conducting wire 211 are connect with usb data capture card 11, and the top of the reference electrode 22 is provided with ginseng
Than electrode cable 221, the reference electrode conducting wire 221 is connect with usb data capture card 11, the reference electrode 22 be it is upper it is big under
Small variable diameter cylinder, the working electrode 21 are set to the path mouth side of the reference electrode 22, the working electrode 21
Diameter is less than the diameter of the path mouth of the reference electrode 22.By using above-mentioned technical proposal, detecting electrode 2 includes work electricity
Pole 21 and reference electrode 22, one end of working electrode 21 are welded with working electrode conducting wire 211, the whole of working electrode 21 (in addition to
The tip contacted with test sample) and working electrode conducting wire 211 and 21 junction of working electrode more than a distance by glass
Glass glue or other with fixed function megohmite insulants package, and with reference electrode 22 mutually bond, working electrode conducting wire 211 with
Usb data capture card 11 connects, and reference electrode conducting wire 221 is connect with usb data capture card 11, when working electrode 21 and reference electricity
Pole 22 is contacted with test sample, and usb data capture card 11 acquires the electric signal of the potential difference between two electrodes, and will collect
Electric signal zoom into the electric signal that can be received, after carrying out data fitting with matlab software, formed a pH value with
The functional relation of potential difference between two electrodes, the source code for being converted into solution ph as potential difference import in labview software,
It is handled using labview software, the images outputting of voltage and pH value is shown on detection display instrument 1；Working electrode 21 and
The end portion of reference electrode 22 is contacted with test sample, and reference electrode 22 is up big and down small variable diameter cylinder, working electrode 21
It is set to the path mouth side of the reference electrode 22, when needing the pH value to tiny place to detect, reference electrode 22
Path mouth can protrude into tiny place, and protrude into working electrode 21, will not be blocked, increase the versatility of product；Work
The diameter of electrode 21 is less than the diameter of the path mouth of reference electrode 22, then working electrode 21 and the contact area of test sample are small,
Required test sample volume is just small, reduces the consumption of test sample, and the electrode area of working electrode 21 is small, sensitivity
Height, favorable reproducibility.
The present embodiment is further arranged: the major diameter mouth diameter of the reference electrode 22 is 8.80mm, the reference electrode 22
Path mouth diameter be 2.54mm, the diameter of the working electrode 21 is 0.1mm.By using above-mentioned technical proposal, reference electricity
The upper diameter of pole 22 is greater than the lower diameter of reference electrode 22, convenient to press from both sides in using operating process to detecting electrode 2
It holds or holds；The lower diameter of reference electrode 22 is small, can protrude into tiny place, and protrude into working electrode 21, will not be hindered
Hinder, increases the versatility of product；The diameter of working electrode 21 is less than the path mouth diameter of reference electrode 22, facilitates working electrode
21 are detected as reference electrode 22 is brought into tiny place, and the diameter of working electrode 21 is 0.1mm, with connecing for test sample
Contacting surface product is small, can sufficiently contact with test sample, and only needs 3-5 microlitres of sample drop face can measure solution on the electrode
PH value avoids the waste of rare, valuable sample.
The present embodiment is further arranged: the working electrode 21 is the metal iridium wire that surface covers iridium oxide membrane.By adopting
With above-mentioned technical proposal, working electrode 21 is the metal iridium wire that surface is covered with lid iridium oxide membrane, and surface is covered with iridium oxide membrane
Metal iridium wire be as made of the electrolytic etching in an acidic solution of metal iridium wire.Iridium is one of strongest metal of corrosion resistance,
It can resist nearly all acid, chloroazotic acid, molten metal, even silicate at high temperature, and stability is high, be not easy and detection sample
Product react.
The present embodiment is further arranged: the reference electrode 22 is Ag/AgCl electrode, and the reference electrode 22 includes insulation
Shell 222 is set to binding post 223 that 222 one end of insulation crust connect with reference electrode conducting wire 221, is set to insulation crust
The 222 interior and silver electrodes 224 being connect with binding post 223 and the saturated potassium chloride solution 225 being filled in insulation crust 222,
The silver electrode 224 is soaked in saturated potassium chloride solution 225, and chlorination Ag films 226, institute are covered in the silver electrode 224
The bottom deposit for stating insulation crust 222 has potassium chloride 227.By using above-mentioned technical proposal, reference electrode 22 is Ag/
AgCl electrode, Ag/AgCl electrode is in the high pressure water solution system of post with the solubility of very little, high stability and reversible
Property, and even if the surface of electrode can also be protected well in the presence of having hydrogen.
The present embodiment is further arranged: the inlet 228 for injecting solution, institute are provided on the insulation crust 222
It states and is arranged on inlet 228 and the matched cork of inlet 228 set 229.By using above-mentioned technical proposal, insulation crust
It is provided with the inlet 228 for injecting solution on 222, is arranged on inlet 228 and the matched cork set of inlet 228
229, can the saturated potassium chloride solution 225 in insulation crust 222 be supplemented or be poured out by inlet 228, cork set 229
It is matched with inlet 228, when cork set 229 is sheathed on inlet 228, can avoid the solution evaporation in insulation crust 222.
Although detection display instrument -1 is used more herein, usb data capture card -11, detecting electrode -2, work electricity
Pole -21, working electrode conducting wire -211, reference electrode -22, reference electrode conducting wire -221, insulation crust -222, binding post -223,
Silver electrode -224, saturated potassium chloride solution -225, chlorination Ag films -226, potassium chloride -227, inlet -228, cork
Set -229, but it does not exclude the possibility of using other terms.The use of these items is only for more easily describe to conciliate
Release the essence of the utility model；Being construed as any additional limitation is disagreed with the spirit of the present invention
's.
Claims (5)
1. a kind of micro-example pH detector, including display instrument and detecting electrode are detected, USB is provided on the detection display instrument
Data collecting card, the detecting electrode are electrically connected with detection display instrument, it is characterised in that: the detecting electrode includes working electrode
With reference electrode, one end of the working electrode is welded with working electrode conducting wire, and the working electrode conducting wire and usb data acquire
Card connection, the top of the reference electrode are provided with reference electrode conducting wire, and the reference electrode conducting wire and usb data capture card connect
It connects, the reference electrode is up big and down small variable diameter cylinder, and the working electrode is set to the path mouth one of the reference electrode
Side, the diameter of the working electrode are less than the diameter of the path mouth of the reference electrode.
2. a kind of micro-example pH detector according to claim 1, it is characterised in that: the major diameter mouth of the reference electrode
Diameter is 8.80mm, and the path mouth diameter of the reference electrode is 2.54mm, and the diameter of the working electrode is 0.1mm.
3. a kind of micro-example pH detector according to claim 2, it is characterised in that: the working electrode covers for surface
The metal iridium wire of lid iridium oxide membrane.
4. a kind of micro-example pH detector according to claim 2, it is characterised in that: the reference electrode is Ag/
AgCl electrode, the reference electrode include insulation crust, are set to the wiring that insulation crust one end is connect with reference electrode conducting wire
Column is set in insulation crust and the silver electrode connecting with binding post and the saturation potassium chloride being filled in insulation crust are molten
Liquid, the silver electrode are soaked in saturated potassium chloride solution, and chlorination Ag films, the insulation crust are covered in the silver electrode
Bottom deposit have potassium chloride.
5. a kind of micro-example pH detector according to claim 4, it is characterised in that: be provided on the insulation crust
For injecting the inlet of solution, it is arranged on the inlet and the matched cork set of inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920015575.9U CN209372747U (en) | 2019-01-04 | 2019-01-04 | A kind of micro-example pH detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920015575.9U CN209372747U (en) | 2019-01-04 | 2019-01-04 | A kind of micro-example pH detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209372747U true CN209372747U (en) | 2019-09-10 |
Family
ID=67829250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920015575.9U Expired - Fee Related CN209372747U (en) | 2019-01-04 | 2019-01-04 | A kind of micro-example pH detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209372747U (en) |
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2019
- 2019-01-04 CN CN201920015575.9U patent/CN209372747U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
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Granted publication date: 20190910 Termination date: 20210104 |