CN202994719U - Fluoride ion concentration online monitor - Google Patents
Fluoride ion concentration online monitor Download PDFInfo
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- CN202994719U CN202994719U CN 201220553633 CN201220553633U CN202994719U CN 202994719 U CN202994719 U CN 202994719U CN 201220553633 CN201220553633 CN 201220553633 CN 201220553633 U CN201220553633 U CN 201220553633U CN 202994719 U CN202994719 U CN 202994719U
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- Prior art keywords
- electrode
- fluoride ion
- battery
- concentration
- line monitoring
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Abstract
The utility model provides a fluoride ion concentration online monitor which is used for detecting concentration of fluoride ions in liquid. The fluoride ion concentration online monitor comprises a control unit, a reaction cup, a peristaltic pump, a battery which is placed in the reaction cup and capable of reacting with the fluoride ions to form electromotive force and a measuring device which is connected with the control unit and used for measuring electric quantity of the battery, wherein a lanthanum trifluoride (LaF3) single crystal film with selectivity to the fluoride ions is arranged on the battery. The fluoride ion concentration online monitor is suitable for measurement of the concentration of fluorine in water body. The fluoride ion selectivity electrode technology is used, fluoride ion selectivity electrodes and external reference electrodes are immersed into fluoride solution with the concentration to be measured, and the battery is formed. Due to the measured electromotive force of the battery, the concentration of the fluoride ions in the liquid to be measured is calculated. The fluoride ion concentration online monitor has the advantages of being simple in operation, convenient to use, fast in detection speed, high in result practical applicability, capable of achieving data sharing remote control and the like.
Description
Technical field
The utility model relates to on-line monitoring instrument field, especially relates to fluorinion concentration on-line monitoring instrument.
Background technology
In recent years, the market development of China On Line monitor was rapid, and product output continuous expansion, national industrial policies encourage on-line monitoring instrument industry to the high-tech product future development, and domestic enterprise's newly-increased investment project investment increases gradually.In the on-line monitoring industry, use the principle of ion-selective electrode that unknown solution is monitored, the equipment of not only making is simple, easy to operate, and the energy rapid Continuous Determination, makes ion be used widely aspect industrial automatic analysis and environmental monitoring online.
At present, because China is more late to the consciousness of environmental protection, the work of carrying out this ion on-line monitoring technique also falls behind developed country.But along with the development of China's economic, government more and more payes attention to environmental problem, and country drops into also increasing to the finance of enviromental protection instrument.But, kind, specification, the accuracy and reliability of China's existing product still can not satisfy the demand of home market at present, relevant technical merit and international most advanced level still have larger gap, the research and development of ion on-line monitoring also are in the starting stage, have formed that low grade products is superfluous, the situation of expensive goods dependence on import.Along with the internationalization of home market and adding of WTO, China's ion on-line monitoring instrument is faced with stern challenge more.Therefore, carry out research, exploitation and the industrialization of high-performance ion on-line monitoring, to promoting the development of China's ion on-line monitoring industry, strengthen the international competitiveness of product, tool is of great significance.
The utility model content
The purpose of this utility model is to solve the existing shortcoming that fluorinion concentration on-line monitoring instrument cost is high, degree of accuracy is not high, reliability is not strong, and a kind of fluorinion concentration on-line monitoring instrument is provided.
The technical scheme that its technical matters that solves the utility model adopts is: fluorinion concentration on-line monitoring instrument, concentration for detection of fluorine ion in liquid, comprise control module, reaction cup, the peristaltic pump that testing liquid can be imported described reaction cup that is connected with described control module, be placed in described reaction cup and can form the battery of electromotive force and be connected the measurement mechanism that is used for measuring described battery electric quantity with described control module with the fluorine ion reaction, described battery is provided with has optionally LaF to fluorine ion
3Single crystalline film.
Particularly, described battery comprises an outer contrast electrode and a fluoride ion selective electrode, and described fluoride ion selective electrode and described outer contrast electrode and testing liquid form the loop of a closure.
Further, the described fluoride ion selective electrode described LaF that comprises the electrode shell of a up/down perforation and be placed in described electrode shell bottom
3Single crystalline film, described electrode shell and described LaF
3Single crystalline film forms one and contains F
-And CL
-The space of the interior reference solution of ion.
Further, described fluoride ion selective electrode also comprises the wire that is placed in described electrode shell top and is connected with described wire and has an end to be placed in Ag-AgCl internal reference electrode in described interior reference solution.
Particularly, described fluorinion concentration on-line monitoring instrument also comprises the magnetic stirrer that is connected with described control module for the uniform stirring testing liquid.
The beneficial effects of the utility model are: fluorinion concentration on-line monitoring instrument provided by the utility model is applicable to the mensuration of fluorine concentration in the water bodys such as water of river and lake, surface water, waterworks, sewage treatment plant, enterprise wastewater discharging, used the fluoride ion selective electrode technology, fluoride ion selective electrode and outer contrast electrode are immersed in the fluorine-containing solution of concentration to be measured, consist of battery, by measuring the electromotive force of battery, calculate the concentration of fluorine ion in testing liquid; Fluorinion concentration on-line monitoring instrument provided by the utility model is simple to operate, easy to use, detection speed is fast, as a result practicality high, realize data sharing Long-distance Control etc.
Description of drawings
Fig. 1 is the structure diagram of the fluorinion concentration on-line monitoring instrument that provides of the utility model embodiment;
Fig. 2 is the structural representation of the fluoride ion selective electrode that provides of the utility model embodiment;
In figure: 1-control module, 2-reaction cup, 3-battery, the outer contrast electrode of 31-, 32-fluoride ion selective electrode, 321-electrode shell, 322-LaF
3Reference solution, 4-peristaltic pump, 5-measurement mechanism in single crystalline film, 323-wire, 324-internal reference electrode, 325-.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
The utility model is based on fluorine ion for LaF
3Single crystalline film has optionally principle, will have LaF
3The fluoride ion selective electrode of single crystalline film and outer contrast electrode immerse in the fluorine-containing solution of concentration to be measured, consist of battery, by measuring the electromotive force of battery, calculate the concentration of fluorine ion in testing liquid.And in fluorine ion on-line monitoring instrument provided by the utility model, the fluorine ion of testing liquid can diffuse into LaF
3The defect hole of single crystalline film film phase, and the ion on the crystal defect of film in mutually can enter into the interior reference solution in fluoride ion selective electrode.Therefore, set up double electrical layers on two interfaces, and at LaF
3The single crystalline film both sides form film potential.And fluoride ion selective electrode and outer contrast electrode and testing liquid form the loop of a closure, have formed electromotive force between two electrodes.And in this cell emf and testing liquid, the logarithm of the concentration of fluorine ion is linear, the electromotive force that first records with the standard solution of variable concentrations, can be depicted as a working curve, again fluoride ion selective electrode and outer contrast electrode are inserted in solution to be measured, obtain a potential value after balance, can find corresponding fluorinion concentration on working curve.
When fluorine-containing test solution contacted, the electromotive force E of battery changed with fluorine ion activity in solution and changes (observing the Nernst equation) when fluoride ion electrode.Obey following relational expression (1):
E＝E-(2.303*RT)/F*logCF-………………………(1)
E becomes direct relation with logCF-, and (2.303*RT)/F is the slope of this working curve, is also the slope of electrode.
Working battery can be expressed as follows:
Ag ∣ AgCl, Cl-, the outer contrast electrode of F-∣ LaF3 ∣ ∣ Shi Ye ∣ ∣.
referring to Fig. 1, be fluorinion concentration on-line monitoring instrument provided by the utility model, concentration for detection of fluorine ion in liquid, be applicable to water of river and lake, surface water, the waterworks, sewage treatment plant, the detection of the fluorine ions in water body concentration of enterprise wastewater discharging etc., it comprises control module 1, reaction cup 2, the peristaltic pump 4 that testing liquid can be imported described reaction cup that is connected with described control module 1, be placed in described reaction cup 2 and can form the battery 3 of electromotive force and be connected the measurement mechanism 5 that is used for measuring described battery electric quantity with described control module 1 with the fluorine ion reaction.Be provided with rotating speed and the time of peristaltic pump 4 on the control module 1 of fluorinion concentration on-line monitoring instrument provided by the utility model inside, can extract at regular time and quantity solution to be measured in reaction cup 2.And be provided with because of battery 3 in fluorinion concentration on-line monitoring instrument provided by the utility model, fluorine ion had optionally LaF
3Single crystalline film 322 makes battery 3 can access the electromotive force of solution to be measured.And the battery 3 in reaction cup 2 forms electromotive force, measures the electromotive force of reaction cup 2 interior solution to be measured by measurement mechanism 5, then feeds back on control module 1.The electromotive force of having stored on control module 1 by comparison and the logarithm working curve of fluorinion concentration obtain the fluorinion concentration of this solution to be measured.Fluorinion concentration on-line monitoring instrument provided by the utility model is simple to operate, easy to use, detection speed is fast, as a result practicality high, can realize the data sharing Long-distance Control.
Particularly, described battery 3 comprises an outer contrast electrode 31 and a fluoride ion selective electrode 32, and described fluoride ion selective electrode 32 and described outer contrast electrode 31 and testing liquid form the loop of a closure.In the utility model, outer reference motor adopts silver electrode, and effect is to provide and keeps a fixing reference potential, requires current potential stable, favorable reproducibility, and temperature coefficient is little.
Further, please refer to Fig. 2, described fluoride ion selective electrode 32 comprises the electrode shell 321 of a up/down perforation and the described LaF that is placed in described electrode shell 321 bottoms
3Single crystalline film 322, described electrode shell 321 and described LaF
3Single crystalline film 322 forms one and contains F
-And CL
-The space of the interior reference solution 325 of ion and be placed in the wire 323 at described electrode shell 321 tops and be connected with described wire 323 and have an end to be placed in Ag-AgCl internal reference electrode 324 in described interior reference solution 325.Described fluoride ion selective electrode 32 can record the vital part of fluorine ion in solution to be measured for the utility model, and the bottom of this fluoride ion selective electrode 32 is provided with LaF
3Single crystalline film 322 makes the fluorine ion of testing liquid can diffuse into LaF
3The defect hole of single crystalline film 322 film phases, and the ion on the crystal defect of film in mutually can enter into the F that contains in fluoride ion selective electrode 32
-And CL
-In the interior reference solution 325 of ion.Therefore, set up double electrical layers on two interfaces, and at LaF
3Single crystalline film 322 both sides form film potential.And fluoride ion selective electrode 32 and outer contrast electrode 31 and testing liquid form the loop of a closure, have formed electromotive force between two electrodes.Thereby can record potential difference (PD) between outer contrast electrode 31 and fluoride ion selective electrode 32 by measurement mechanism 5.
Particularly, also comprise at described fluorinion concentration on-line monitoring instrument the magnetic stirrer (not shown) that is connected with described control module 1 for the uniform stirring testing liquid.Magnetic stirrer is at peristaltic pump 4 during to the interior importing testing liquid of reaction cup 2, the testing liquid in stirring reaction cup 2 at the uniform velocity, thus obtain the uniform testing liquid of concentration.Can improve the accuracy of detection.
These are only preferred embodiment of the present utility model, not in order to limiting the utility model, all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection domain of the present utility model.
Claims (5)
1. fluorinion concentration on-line monitoring instrument, concentration for detection of fluorine ion in liquid, it is characterized in that: comprise control module, reaction cup, the peristaltic pump that testing liquid can be imported described reaction cup that is connected with described control module, be placed in described reaction cup and can form the battery of electromotive force and be connected the measurement mechanism that is used for measuring described battery electric quantity with described control module with the fluorine ion reaction, described battery is provided with has optionally LaF to fluorine ion
3Single crystalline film.
2. fluorinion concentration on-line monitoring instrument as claimed in claim 1, it is characterized in that, described battery comprises an outer contrast electrode and a fluoride ion selective electrode, and described fluoride ion selective electrode and described outer contrast electrode and testing liquid form the loop of a closure.
3. fluorinion concentration on-line monitoring instrument as claimed in claim 2, is characterized in that, the described LaF that described fluoride ion selective electrode comprises the electrode shell of a up/down perforation and is placed in described electrode shell bottom
3Single crystalline film, described electrode shell and described LaF
3Single crystalline film forms one and contains F
-And CL
-The space of the interior reference solution of ion.
4. fluorinion concentration on-line monitoring instrument as claimed in claim 2 or claim 3, it is characterized in that, described fluoride ion selective electrode also comprises the wire that is placed in described electrode shell top and is connected with described wire and has an end to be placed in Ag-AgCl internal reference electrode in described interior reference solution.
5. fluorinion concentration on-line monitoring instrument as claimed in claim 1, is characterized in that, described fluorinion concentration on-line monitoring instrument also comprises the magnetic stirrer that is connected with described control module for the uniform stirring testing liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220553633 CN202994719U (en) | 2012-10-26 | 2012-10-26 | Fluoride ion concentration online monitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220553633 CN202994719U (en) | 2012-10-26 | 2012-10-26 | Fluoride ion concentration online monitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202994719U true CN202994719U (en) | 2013-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220553633 Expired - Fee Related CN202994719U (en) | 2012-10-26 | 2012-10-26 | Fluoride ion concentration online monitor |
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| CN (1) | CN202994719U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105301069A (en) * | 2015-09-30 | 2016-02-03 | 王竞 | Liquid analysis method and device adopting ion-selective-electrode method |
| CN105675674A (en) * | 2016-01-13 | 2016-06-15 | 衢州学院 | Method for determination of organic fluorine concentration of water through high temperature catalysis |
-
2012
- 2012-10-26 CN CN 201220553633 patent/CN202994719U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105301069A (en) * | 2015-09-30 | 2016-02-03 | 王竞 | Liquid analysis method and device adopting ion-selective-electrode method |
| CN105675674A (en) * | 2016-01-13 | 2016-06-15 | 衢州学院 | Method for determination of organic fluorine concentration of water through high temperature catalysis |
| CN105675674B (en) * | 2016-01-13 | 2018-01-09 | 衢州学院 | The method that organic Funing tablet in water body is determined using high-temperature catalytic |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130612 Termination date: 20181026 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |