CN109425644A - A kind of solid contact ion selective electrode and its preparation and application - Google Patents
A kind of solid contact ion selective electrode and its preparation and application Download PDFInfo
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Abstract
The present invention relates to the detection method of effects of ion, specifically a kind of solid contact ion selective electrode and its preparation and application.Using the inorganic ions with redox active-electron transduction material as ion-electron, transduction layer, is adhered to electrode matrix bottom, then polymer ions selective membrane is carried on above-mentioned transduction layer, i.e. acquisition solid contact ion selective electrode；Wherein, material is Ag@AgCl/KCl.The present invention is prepared for redox capacitor height, the small novel inorganic ion-electron transduction layer Ag@AgCl/KCl of resistance by means of the presence of hydrone in polymer ions selective membrane microbody system.And prepared solid-state Calcium signaling has potential response speed fast, and stability is high, not by external interference the advantages that.Therefore, the solid ion-electron transduction layer novel for one kind can be developed, and is applied to the preparation and application study of solid ionic electrodes selective.
Description
Technical field
The present invention relates to the detection method of calcium ion in solution, specifically a kind of solid contact ion selectivity electricity
Pole and its preparation and application.
Background technique
It currently, is solid ionic selectivity electricity based on the research of solid ionic electrodes selective intermediate ion-electron transduction layer
One hot spot of pole research.Ion-electron transduction layer based on redox capacitor transduction mechanism is solid ionic selectivity electricity
The earliest transduction layer material of research in extremely, wherein most typical research object is organic conductive polymer.However organic conductive is poly-
Closing the part functional group that object has the sensibility to light in use, and itself has can occur instead with oxygen
It answers.In addition, there are certain continuitys for the oxidation-reduction potential of organic conductive polymer itself, solid ionic selection can be influenced
The reproducibility of property electrode.These all limit use of the organic conductive polymer in solid ionic electrodes selective.Based on oxygen
Change other organic transduction layers of reduction transduction mechanism also by wide coverage, such as hydrophobic organic silver composite, ferrocene, Pu Lu
Scholar's indigo plant, tetrathiafulvalene and fat-soluble Co (II)/Co (III) salt etc..In addition, based on organic matter protection, doping have
Machine-inorganic composite materials (the self-organizing organic monolayer such as based on fullerene, the gold nano based on the protection of aryl mercaptan
Cluster) also it is reported.Above-mentioned redox transduction layer is mainly based on organic compounds either by the part in organic matter
Functional group, the application of the redox transduction layer based on inorganic material, will turn for solid ionic electrodes selective intermediate ion-electronics
The exploitation of conducting shell provides a new thinking.
Summary of the invention
The purpose of the present invention is to provide a kind of solid contact ion selective electrode and its preparations and application.
To achieve the above object, the technical solution adopted by the present invention are as follows:
A kind of solid contact ion selective electrode, with the inorganic ions with redox active-electron transduction material
Material is adhered to electrode matrix bottom, then polymer ions selective membrane is carried on above-mentioned turn as ion-electron transduction layer
On conducting shell, that is, obtain solid contact ion selective electrode；Wherein, inorganic ions-electron transduction material is Ag@AgCl/
KCl。
The Ag@AgCl/KCl load capacity is 10~15 μ L.
The Ag AgCl is core-shell structure, preparation are as follows:
1) ethylene glycol is reacted at 160-165 DEG C 1.0-1.1h with PVP, adds the ethylene glycol solution containing NaBr, and
It is slowly added dropwise again containing AgNO afterwards3Ethylene glycol solution, and the reaction was continued 0.5-0.6h is to get arriving khaki product Ag；
2) by above-mentioned acquisition product Ag and PVP, ultrasonic disperse is mixed in deionized water, is added under agitation after mixing
Add FeCl3Aqueous solution reacts 8-12h at 25-30 DEG C to get native tan product is arrived；
3) above-mentioned acquisition product is carried out that precipitating is collected by centrifugation, precipitating deionized water, ethyl alcohol successively clean, after cleaning in
10h is dried in 80 DEG C of vacuum drying oven to get the Ag@AgCl of core-shell structure is arrived.
The Ag@AgCl of above-mentioned acquisition is mixed with KCl, ultrasonic disperse 30-40min in 0.9-1.0mL water is dispersed
Uniform Ag@AgCl/KCl dispersion liquid；Wherein the mass ratio of Ag@AgCl and KCl is 4-1:1, preferably 2-1:1.
The polymer ions selective membrane is ionophore, plasticizer, polymeric matrix and ion-exchanger；It will be by weight
Percentages are measured, 1wt% ionophore, 66wt% plasticizer and the mixing of 33wt% polymeric matrix then add ion friendship
Agent is changed, is dissolved in THF and forms a film after addition；Wherein, the molar ratio of ion-exchanger and ionophore is 1:2.
By taking the preparation of calcium ion polymer sensitive membrane as an example: with N, the bis- octadecyl -3- oxa-s of N- dicyclohexyl-N ', N ' -
Glutaramide responds carrier as calcium ion, with four (3,5- bis- (trifluoromethyl) phenyl) Boratex/potassium as ion-exchanger,
It is selected using polyvinyl chloride, poly- butyl propyleneglycol acid esters, butyl polyacrylate, polyetherimide, rubber or sol-gel film as ion
The substrate of selecting property film, with o- nitrobenzene octyl ether (o-NPOE), two -2- ethylhexyl last of the ten Heavenly stems esters, dibutyl sebacate or decanedioic acid two
Monooctyl ester is dissolved among tetrahydrofuran solution as plasticizer.
A kind of application of solid contact ion selective electrode, the solid contact based on Ag@AgCl/KCl transduction
Formula ion selective electrode is for the detection to effects of ion concentration.
The present invention has the advantages that
The present invention develops the novel nothing based on redox capacitor transduction mechanism using Ag@AgCl/KCl as research object
Machine ion-electron transduction layer, and be applied on solid ionic electrodes selective.To be novel solid contact ion selectivity
The preparation research of electrode has opened up new thinking, and mentions for the large-scale industrial production of solid contact ion selective electrode
It is selective, specifically:
The layer 1. solid contact ion selective electrode of the invention is transduceed, is connect with the solid of the pattern with core-shell structure
Contact layer Ag@AgCl is redox main body, by adding KCl, and by means of moisture in polymer ions selective membrane microbody system
The presence of son obtains inorganic ions-electron transduction layer Ag@AgCl/KCl.
2. solid contact ion selective electrode of the invention, inorganic ions-electron transduction layer Ag@AgCl/KCl draws
Enter, so that the impedance of electrode reduces, redox capacitor increases, and the potential stability of constructed electrode is good, fast response time.Together
When, the strong interference immunity of prepared electrode, the not influence of light, oxygen and carbon dioxide.Therefore, inorganic ions-electron transduction
Layer Ag@AgCl/KCl can develop as novel solid contact ion selective electrode transduction layer.
3. the solid ionic electrodes selective prepared by the present invention based on inorganic material Ag@AgCl/KCl transduction is to calcium ion
Detection sensitivity it is high, fast response time, stability is good.The result shows that solid ionic electrodes selective is to the linear of calcium ion
Response range is 10-6-10-1M, detection are limited to 10-6.3M；Linear response range to sodium ion is 10-2-10-6M, detection are limited to
10-6.5M。
Detailed description of the invention
Fig. 1 is synthesized Ag and Ag@AgCl nano material provided in an embodiment of the present invention: (a) Ag (b) Ag@AgCl.
Fig. 2 is GC/Ag@AgCl/KCl/Ca provided in an embodiment of the present invention2+- ISM electrode is 10-7-10-1M calcium chloride is molten
The real-time potential response curve (a) to calcium ion and calibration curve spectrogram (b) are measured in liquid.
Fig. 3 is the resistance of the solid-state Calcium signaling provided in an embodiment of the present invention based on Ag@AgCl/KCl transduction
Anti- test spectrogram.
Fig. 4 is provided in an embodiment of the present invention based on the solid-state Calcium signaling of Ag@AgCl/KCl transduction
When current potential spectrogram.
Specific embodiment
Explanation that the present invention will be further explained with reference to the accompanying drawings and examples.
The present invention is based on inorganic oxide reducing material Ag/AgCl/KCl as solid ionic-electron transduction layer.The material with
The Ag nano material of specific morphology, then in FeCl3Under existence condition, by the way that redox reaction occurs, in Ag nano material
Surface Creation AgCl, obtain have core-shell structure Ag AgCl inorganic oxide also protocorm, then add inorganic salts KCl make
Solid ionic-electron transduction layer is formed, can be had by means of the presence of hydrone in microbody system for the generating resource of chloride ion
The current potential of the maintenance of the effect redox system is stablized.And prepared solid-state Calcium signaling has potential response
Speed is fast, and stability is high, not by external interference the advantages that.Therefore, it can develop as a kind of novel solid ion-electron transduction
Layer, and it is applied to the preparation and application study of solid-state Calcium signaling.
Embodiment 1
Specific preparation process is as follows for solid contact Calcium signaling:
1) preparation of sensitive membrane: 2mg Calcium ionophore the preparation of polymer Calcium signaling: is weighed respectively
The polymer P VC matrix of ETH5234,1mg ion-exchanger NaTFPB, 66mg, the plasticizer o-NPOE of 132mg is in weighing bottle
In, the steaming THF again of 1.6mL is then measured and be added, it is molten to get the uniform calcium ion selective film of concentration that processing 2h is stirred at room temperature
Liquid.
2) with the preparation of specific nucleocapsid microscopic appearance Ag AgCl:
The ethylene glycol of 15mL is measured first in the round-bottomed flask of 25mL, the PVP for then weighing 100mg is added thereto, and
1h is stirred to react under the conditions of temperature is 160 DEG C of oil bath.Rapidly joining the ethylene glycol solution of 0.5mL NaBr, (concentration is
2mM), and continue to be stirred to react 5min.1mL AgNO is slowly added to after the completion of stirring dropwise3Ethylene glycol solution (concentration 2mM),
Continue to be stirred to react 30min after the completion of being added to get khaki product Ag is arrived.Above-mentioned product is collected by centrifugation, and is successively used
Ethyl alcohol, water respectively flush three times, and collect product and are dried 10h in 80 DEG C of vacuum drying oven.
The Ag nano material of 10mg preparation is weighed respectively, then 100mg PVP ultrasonic disperse exists in 10mL deionized water
The FeCl that 2mL concentration is 10mM is added dropwise under stirring condition3Aqueous solution, is stirred overnight reaction to get to native tan product, from
The heart is collected and is respectively flushed three times with deionized water, ethyl alcohol, and products therefrom is dried 10h in 80 DEG C of vacuum drying oven,
Obtain Ag AgCl product.(referring to Fig. 1)
It can be seen that prepared Ag with spherical morphology by Fig. 1 a, the partial size of Ag ball is 50-100nm, and Ag nanometers
The surface of ball is smooth.Fig. 1 b is to cover the product morphology of one layer of AgCl in Ag ball surface, can be seen that the painting of AgCl from Fig. 1 b
The increase for resulting in Ag ball surface roughness is covered, and the partial size of Ag@AgCl product is also changed, it was demonstrated that Ag@AgCl
The synthesis of structure.
3) load of transduction layer:
First by glass-carbon electrode that diameter is 3mm in being dispersed with Al2O3The throwing of dispersing agent (partial size is successively 0.3,0.05 μm)
It polishes on light cloth, respectively at being respectively ultrasonically treated 5min in deionized water, ethyl alcohol after the completion of polishing, then blows electrode with nitrogen
It is dry, it is spare.
The Ag@AgCl product of the above-mentioned preparation of 2mg is weighed, in the deionized water of 1mL, ultrasonic treatment 15min is obtained 1mg KCl
To finely dispersed Ag@AgCl dispersion liquid, the above-mentioned dispersion liquid of 10 μ L then is measured with liquid-transfering gun and is added drop-wise to the glass carbon handled well
On electrode, and dried under infrared lamp, it is spare.
4) a certain amount of polymer sensitive membrane solution 1) prepared is measured with liquid-transfering gun, is added dropwise to the electrode 3) prepared
On, and volatilized overnight to get the solid contact Calcium signaling completed to preparation at room temperature.
Embodiment 2
By the above-mentioned solid-state Calcium signaling for preparing Ag@AgCl/KCl transduction calcium ion in being used for solution
Measurement before, first concentration be 10-3It is activated for 24 hours in M calcium chloride solution.
When electrode is used to measure, using the solid-state Calcium signaling that Ag@AgCl/KCl transduces as working electrode, with
The saturated calomel electrode of 0.1M lithium acetate salt bridge is connected with as reference electrode, the two constitutes test loop system.Prepared consolidates
Body contact Calcium signaling (GC/Ag@AgCl/KCl/Ca2+- ISM) it is different by record to the response of calcium ion
CaCl2What the potential response value of solution measured.The concentration of ionic calcium soln is 10 in test-1-10-7M is 0.1M's by concentration
CaCl2Solution dilutes step by step to be formulated.Data acquisition is carried out by thunder magnetic ion meter, and draws corresponding potential-time curve
And current potential and concentration curve, referring to fig. 2.
By Fig. 2 a it will be seen that above-described embodiment obtains the fast response time of solid-state Calcium signaling,
It can reach potential balance within the time less than 3s.In addition, prepared solid contact Calcium signaling is not to
Potential response with concentration ionic calcium soln is stablized.Fig. 2 b shows that solid contact Calcium signaling is living in calcium ion
Degree is 10-6-10-1Linear response is presented in the range of M, response slope 27.9mV/decade, meeting can this special response characteristic.
In addition, the electrode is 10 to the Monitoring lower-cut of calcium ion activity-6.3M。
Embodiment 3
1) preparation of core-shell structure Ag@AgCl:
The ethylene glycol of 15mL is measured first in the round-bottomed flask of 25mL, the PVP for then weighing 100mg is added thereto, and
1h is stirred to react under the conditions of temperature is 160 DEG C of oil bath.Rapidly join 0.5mL Na2(concentration is the ethylene glycol solution of S
2mM), and continue to be stirred to react 5min.1mL AgNO is slowly added to after the completion of stirring dropwise3Ethylene glycol solution (concentration 2mM),
Continue to be stirred to react 30min after the completion of being added to get khaki product Ag is arrived.Above-mentioned product is collected by centrifugation, and is successively used
Ethyl alcohol, water respectively flush three times, and collect product and are dried 10h in 80 DEG C of vacuum drying oven, for use.
The Ag nano material of 10mg preparation is weighed respectively, then 100mg PVP ultrasonic disperse exists in 10mL deionized water
The FeCl that 2mL concentration is 10mM is added dropwise under stirring condition3Aqueous solution, is stirred overnight reaction to get to native tan product, from
The heart is collected and is respectively flushed three times with deionized water, ethyl alcohol, and products therefrom is dried 10h in 80 DEG C of vacuum drying oven,
Obtain Ag AgCl product.
2) remaining implementation steps is referring to 1 step 2 of embodiment, 3,4 and embodiment 2 carry out, counted by thunder magnetic ion meter
According to acquisition, and draw corresponding potential-time curve and current potential and concentration curve.
Embodiment 4
The preparation of core-shell structure Ag@AgCl synthesizes
1) 1,3-BDO of 15mL is measured first in the round-bottomed flask of 25mL, it is added in the PVP for then weighing 100mg
In, and 1h is stirred to react under the conditions of temperature is 160 DEG C of oil bath.0.5mL is rapidly joined containing Na2The 1,3 butylene glycol solution of S
(concentration 2mM), and continue to be stirred to react 5min.1mL is slowly added to after the completion of stirring dropwise containing AgNO31,3 butylene glycol it is molten
Liquid (concentration 2mM) continues to be stirred to react 30min after the completion of being added to get khaki product Ag is arrived.Above-mentioned product is centrifuged
It collects, and is successively respectively flushed three times with ethyl alcohol, water, collect product and be dried 10h in 80 DEG C of vacuum drying oven.
2) remaining implementation steps is referring to 1 step 2 of embodiment, 3,4 and embodiment 2 carry out, counted by thunder magnetic ion meter
According to acquisition, and draw corresponding potential-time curve and current potential and concentration curve.
Embodiment 5
Electrochemical impedance test to the solid-state Calcium signaling of above-mentioned preparation.
In order to investigate the electrochemical properties of prepared solid state electrode, to addition and do not added by electrochemical impedance spectroscopy experiment
The solid-state Calcium signaling of Ag@AgCl/KCl transduction layer has carried out comparative study.With the electrification of model CHI 760C
Work station (Shanghai, occasion China) is learned to investigate the electrochemical impedance of solid ionic electrodes selective.
Three electrode detection systems are used in test process, wherein solid-state Calcium signaling is working electrode, Ag/
AgCl/3M KCl is reference electrode, and platinum electrode is auxiliary electrode.Electrochemical impedance spectroscopy is the CaCl in 0.1M2In solution into
Row measurement, frequency range is 105Hz to 0.01Hz, excitation amplitudes 50mV carry out the electrochemical impedance test of high and low frequency
(referring to Fig. 3).
The electrochemical impedance spectroscopy of two kinds of solid-state Calcium signalings it can be seen from electrochemical impedance spectrogram is crossed by Fig. 3
Figure includes high frequency region and low frequency range two parts.The semicircle of high frequency region and the body phase resistance of polymer ions selective membrane polymerize
The contact resistance (between conductive substrates, solid contact layer and ion selectivity membrane interface) and geometry of the covered contact surface of object film
Capacitor is related.To the solid Calcium signaling of Ag AgCl/KCl transduction, alternating-current resistance size is 0.23M Ω, and is not had
The solid-state Calcium signaling alternating-current resistance for having transduction layer is 0.34M Ω.As can be seen that Ag@AgCl/KCl transduction layer
Introduce the resistance that can reduce solid-state Calcium signaling.This is mainly due to the presence of transduction layer Ag@AgCl/KCl, energy
Enough improve electric charge transfer rate between solid conduction substrate and polymer ions selective membrane.On the other hand, in low frequency range and GC/
Ag@AgCl/KCl/Ca2+- ISM electrode is compared, GC/Ca2+- ISM has big low frequency semicircle, which is derived from small electric double layer
There is big charge transfer resistance between capacitor and glass-carbon electrode and ion selectivity membrane interface.It can be seen additionally by spectrogram
Out, GC/Ag@AgCl/KCl/Ca2+The low frequency range spectrogram of-ISM electrode illustrates the layer Ag@that transduces closer to the real axis of impedance spectrum
The introducing of AgCl/KCl can increase the low frequency redox capacitor of Calcium signaling, so as to accelerate ion to select
The ion-electron conversion process of property film and solid contact interlayer.
Embodiment 6
Chronopotentiometry:
To the electrochemical properties of above-mentioned acquisition solid state electrode, Ag@to addition and is not added by electrochemical impedance spectroscopy experiment
The solid-state Calcium signaling of AgCl/KCl transduction layer has carried out comparative study.By the electrochemistry of model CHI 760C
Work station (Shanghai, occasion China) is to the electrochemical impedance of solid ionic electrodes selective into investigation.
Three electrode detection systems are used in test process, wherein solid-state Calcium signaling is working electrode, Ag/
AgCl/3M KCl is reference electrode, and platinum electrode is auxiliary electrode.
In order to evaluate the capacitor and the above-mentioned solid-state Calcium signaling prepared of Ag@AgCl/KCl transduction layer
Stability, the constant current time-measuring electric potential detection method proposed using Bobacka seminar: the electric current of application ± 1nA, and recording
Potential change (referring to fig. 4).GC/Ag@AgCl/KCl/Ca as shown in Figure 42+- ISM and GC/Ca2+- ISM solid state electrode is in concentration
For the CaCl of 0.1M2The time-measuring electric potential spectrogram measured in solution, wherein solid line, dotted line respectively represent GC/Ag@AgCl/KCl/Ca2 +-ISM、GC/Ca2+The corresponding time-measuring electric potential spectrogram of-ISM electrode.
Since two class electrodes have different low frequency capacitives, so that the two has different time-measuring electric potential spectrograms.Meter
When current potential spectrogram in, current potential change with time (Δ E/ Δ t) can be used as evaluation electrode stability important indicator.Root
GC/Ag AgCl/KCl/Ca can be obtained according to experimental data2+- ISM electrode potential rate of change is 6.67 ± 2.1 μ V/s (n=3), with
Compare, the GC/Ca for layer of not transduceing2+- ISM electrode potential rate of change is 0.42mV/s, it can be seen that Ag@AgCl/KCl turns
The introducing of conducting shell can significantly improve the stability of solid ionic electrodes selective.In addition, according to formula Δ E/ Δ t=I/C, it can
Obtaining the low frequency capacitive size based on the Ag@AgCl/KCl solid-state Calcium signaling transduceed is 150 μ F.Such material capacitor
Value is greater than reported graphene (83 μ F), carbon nanotube (60 μ F) class material capacitor.
Embodiment 7
To above-mentioned prepared GC/Ag@AgCl/KCl/Ca2+Detection of-ISM the electrode to calcium ion content in seawater sample
Analysis has been carried out the assay of Bohai Offshore fractional-sample point Calcium in Seawater ion by standard addition method, and experiment has been tied
Fruit is compared with traditional detection method inductively coupled plasma atomic emission spectrometry experimental result, with confirmatory experiment knot
The accuracy of fruit.Specific experiment result is as shown in table 1 below.
Pass through contrast and experiment, GC/Ag@AgCl/KCl/Ca2+The experiment of the obtained Calcium in Seawater ion of-ISM electrode
Measurement result, almost the same with inductively coupled plasma atomic emission spectrometry the data obtained, therefore, prepared is novel solid
State GC/Ag@AgCl/KCl/Ca2+- ISM electrode can be applied to the detection and analysis of Calcium in Seawater ion concentration.
Table 1GC/Ag@AgCl/KCl/Ca2+The detection of-ISM electrode and ICP-AES to calcium ion content in seawater sample
As a result (average value ± standard deviation, n=3)
Embodiment 8
Using sodium ion selective electrode as research object, it is prepared for the solid-state sodium ion choosing transduceed based on Ag@AgCl/KCl
Selecting property electrode, and the sodium ions content in solution is tested and analyzed.
1) preparation of sodium ion sensitive membrane: weighing 2mg sodium ion carrier V, 0.12mg ion-exchanger KTFPB respectively,
Then the polymer P VC matrix of 66mg, the plasticizer o-NPOE of 132mg measure and are added the steaming again of 1.6mL in weighing bottle
The processing 2h sodium ion selective coating solution uniform to get concentration is stirred at room temperature in THF.
Solid-state sodium ion selective electrode preparation process such as embodiment 1 based on Ag AgCl/KCl transduction.It is prepared by electrode
Be activated overnight in the NaCl solution of 1mM after, after the completion of activation in concentration be 10-1-10-7Electrode is carried out in the NaCl solution of M
Response test.
Meanwhile solid contact ion selective electrode is obtained in such a way that the above embodiment of the present invention is recorded and is being prepared
Carrying out different replacements to ionophore during film can be realized the different metal ion of detection, and the metal ion of detection can
For potassium, lead, cadmium, mercury, copper etc..
Claims (6)
1. a kind of solid contact ion selective electrode, it is characterised in that: with inorganic ions-electricity with redox active
Sub- exemplary transducer materials are adhered to electrode matrix bottom, then polymer ions selective membrane is loaded as ion-electron transduction layer
In on above-mentioned transduction layer, that is, obtain solid contact ion selective electrode；Wherein, inorganic ions-electron transduction material is Ag@
AgCl/KCl。
2. solid contact ion selective electrode according to claim 1, it is characterised in that: the Ag@AgCl/KCl is negative
Carrying capacity is 10~15 μ L.
3. solid contact ion selective electrode as described in claim 1 or 2, it is characterised in that:
The Ag AgCl is core-shell structure, preparation are as follows:
1) ethylene glycol is reacted at 160-165 DEG C 1.0-1.1h with PVP, adds the ethylene glycol solution containing NaBr, then again
It is slowly added dropwise containing AgNO3Ethylene glycol solution, and the reaction was continued 0.5-0.6h is to get arriving khaki product Ag；
2) by above-mentioned acquisition product Ag and PVP, ultrasonic disperse is mixed in deionized water, is added under agitation after mixing
FeCl3Aqueous solution reacts 8-12h at 25-30 DEG C to get native tan product is arrived；
3) above-mentioned acquisition product is carried out that precipitating is collected by centrifugation, precipitating deionized water, ethyl alcohol successively clean, in 80 DEG C after cleaning
Vacuum drying oven in be dried 10h to get arrive core-shell structure Ag@AgCl.
4. pressing solid contact ion selective electrode described in claim 1,2 or 3, it is characterised in that: by above-mentioned acquisition
Ag@AgCl is mixed with KCl, ultrasonic disperse 30-40min in 0.9-1.0mL water, obtains finely dispersed Ag@AgCl/KCl points
Dispersion liquid；Wherein the mass ratio of Ag@AgCl and KCl is 4-1:1.
5. solid contact ion selective electrode as described in claim 1 or 2, it is characterised in that: the polymer ions
Selective membrane is ionophore, plasticizer, polymeric matrix and ion-exchanger.
6. a kind of application of solid contact ion selective electrode described in claim 1, it is characterised in that: described to be based on
The solid contact ion selective electrode of Ag@AgCl/KCl transduction is for the detection to effects of ion concentration.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113588753A (en) * | 2021-07-09 | 2021-11-02 | 中国科学院烟台海岸带研究所 | Ion selective electrode current detection method |
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| CN109425644B (en) | 2020-12-01 |
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