CN202522550U - Device for capturing carbonate radicals in strong alkaline solution - Google Patents
Device for capturing carbonate radicals in strong alkaline solution Download PDFInfo
- Publication number
- CN202522550U CN202522550U CN2012201077261U CN201220107726U CN202522550U CN 202522550 U CN202522550 U CN 202522550U CN 2012201077261 U CN2012201077261 U CN 2012201077261U CN 201220107726 U CN201220107726 U CN 201220107726U CN 202522550 U CN202522550 U CN 202522550U
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- carbonate
- passage
- leacheate
- strong base
- base solution
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Abstract
The utility model relates to a device for capturing carbonate radicals in a strong alkaline solution. In the device, an anion exchange microsphere is used for replacing the traditional anion exchange flat membrane as an isolating component for a leaching solution channel and a regenerated solution channel. The capturing device can remove residual carbonate radicals in a strong alkaline leaching solution based on the electrodialysis principle in an online way. The volume of a cavity is about 200-500 nL, and the pressure resistance is about 15 MPa. The device is mainly applicable to a capillary ion chromatography system using the strong alkaline leaching solution. The device is beneficial to increasing analysis repeatability and detection sensitivity.
Description
Technical field
The utility model relates to the purified solution equipment technical field, especially for the acquisition equipment of carbonate in the strong base solution of capillary chromatography direction.
Background technology
Chromatography of ions is a branch of liquid chromatography, mainly is the compartment analysis that is used for the ionic state compound.Wherein chromatography of ions is an one preferred technique of analyzing inorganic anion at present.In anion analysis; Say from detection angles; Hydroxyl leacheate (the most frequently used is NaOH or potassium hydroxide) is ideal; Because the product of hydroxyl leacheate after rejector suppresses is pure water, it is very little to go up background conductance at electric conductivity detector (being the most frequently used detecting pattern of chromatography of ions), helps the raising of signal to noise ratio (S/N ratio).By contrast, a kind of in addition negative ion leacheate carbonate system commonly used, it suppresses product is carbonic acid.Because faint its background conductance of ionization of carbonic acid is apparently higher than pure water.In view of the advantage of hydroxyl leacheate in context of detection, developed the chromatographic column that to adapt to specially the hydroxyl leacheate at present, in anion analysis, used widely.Because hydroxyl (monovalent ion) is for carbonate (divalent ion), eluting power is obviously not enough, therefore if in the hydroxyl leacheate if mix or polluted by carbonate, will cause sample to keep reappearance variation, the precision of impact analysis.In addition, the existence of carbonate also is unfavorable for follow-up detection.In fact, the hydroxyl leacheate is very easily polluted by carbonate, and this is to change carbonate into because carbon dioxide in air is easy to be dissolved in the hydroxyl solution (aqueous slkali), and is especially all the more so for the aqueous slkali of high concentration.Therefore eliminating carbonate residual in the hydroxyl leacheate is the important prerequisite of guaranteeing that analysis result reappears.
Common settling mode is accelerated dosing speed as much as possible, reduces the chance of polluting, but owing to a large amount of carbon dioxide in the air, pollution always is difficult to avoid; U.S. Dai An company has proposed a kind of online carbonate acquisition equipment based on amberplex for addressing this problem, and ultimate principle is to utilize the electrodialysis principle, and a negative ion flat sheet membrane comes leacheate passage and regenerated liquid channel separation.Wherein place negative electrode in the leacheate passage, and place anode in the regenerated liquid passage.During work, to the anodic site, brine electrolysis produces the captive carbonate of hydroxyl balance to the carbonate under electric field action in the leacheate solution near the cathode electrode through the electromigration of negative ion flat sheet membrane.
Capillary ion chromatography is efficient with it, save solvent, be easy to become one of analytical technology that is concerned by people most in recent years with advantage such as mass spectrometry.The capillary separation column internal diameter between 0.1 to 0.6 mm, can be saved about 100 times with respect to conventional ion chromatographic system (4mm i.d.) leacheate and sample usually.Because the reduction of channel size, require miscellaneous part require adaptive.The carbonate acquisition equipment will develop capillary ion chromatography system as important annex of modern ion chromatography system, is necessary to develop miniature carbon acid group acquisition equipment.U.S. Dai An company has also released it in 2010 and has been applicable to the micro device of capillary ion chromatography on the basis of its conventional equipment.This device still adopts the structure identical with legacy system, only is the decline in proportion of size.Its defective is ion-exchange flat sheet membrane voltage endurance capability not enough (usually < 0.8 MPa); The lifting that the mode that this device adopts tens tunics to superpose realizes voltage endurance capability is to overcome the withstand voltage defect of insufficient of flat sheet membrane; But structure is very complicated, and the use of flat sheet membrane simultaneously is unfavorable for reducing cavity volume.
The utility model content
The purpose of the utility model is in order to solve the problems of the technologies described above, the acquisition equipment of carbonate in a kind of strong base solution to be provided, can under elevated pressures, carrying out work in the hope of realizing this device.
The technical scheme that the utility model is taked is:
The acquisition equipment of carbonate in a kind of strong base solution; Comprise a regenerated liquid passage, a leacheate passage; Spaced-apart between said regenerated liquid passage and the said leacheate passage through an anionic membrane, in said regenerated liquid passage, the direct current negative electrode is set, in said leacheate passage, the direct current anode is set; Its characteristic is being that said anionic membrane is sphere or dish type.
Further, in said regenerated liquid passage, be provided with water inlet pipe, said water inlet pipe is as the direct current negative electrode.
Further, said water inlet pipe is the platinum pipe.
Further, liquid is pure water in the said regenerated liquid passage, and said strong base solution is NaOH or potassium hydroxide or lithium hydroxide.
Further, said anionic membrane is quaternary amine type, tertiary amine-type or secondary amine type.
Further, the diameter of said spherical anionic membrane or dish type anionic membrane is 0.5mm to 1mm.
Further, said regenerated liquid passage and leacheate passage are fixedly mounted in stainless steel threeway or the PEEK four-way.
The beneficial effect of the utility model is:
1, simple in structure, volume is controlled at 200 to 500nL;
2, voltage endurance capability is strong, can reach 15Mpa;
3, the spherical form of negative ion microballoon improves the sealing property of two passages;
4, this device helps improving analysis reappearance and detection sensitivity in capillary ion chromatography system.
Description of drawings
Accompanying drawing 1 is the structural representation of the utility model.
Label in the accompanying drawing is respectively:
1. stainless steel threeway; 2. leacheate passage;
3. negative ion microballoon; 4. regenerated liquid passage;
5. water inlet pipe.
Embodiment
Elaborate below in conjunction with the embodiment of accompanying drawing to the acquisition equipment of carbonate in the utility model strong base solution.
Referring to accompanying drawing 1, the straight flange of stainless steel threeway 1 is installed leacheate passage 2, and its diameter is between 0.1mm to 0.6mm; Vertical edges in stainless steel threeway 1 is installed regenerated liquid passage 4, and leacheate passage 2 links with regenerated liquid passage 4, two passage intersections; Anionic membrane is installed, optional sphere of anionic membrane or dish type, promptly the negative ion microballoon 3; Its diameter is 0.5mm to 1mm, and the negative ion microballoon separates leacheate passage 2 and regenerated liquid passage 4, can only allow that negative ion passes through.In regenerated liquid passage 4, be installed into water pipe 5, the water inlet end of water inlet pipe 5 connects peristaltic pump or air driven pump, and negative ion microballoon 3 is taken in the water side.In regenerated liquid passage 4, positive electrode is set, in leacheate passage 2, negative electrode is set, anodic-cathodic is supplied power by constant current supply, and electrode is selected stick electrode for use.Water inlet pipe 5 adopts the platinum material, can doublely do positive electrode, and leacheate passage 2 can be provided with the housing of stainless steel threeway 1 and communicate, and stainless steel threeway 1 can be directly as negative electrode.Through polyetheretherketone (PEEK) pipe regenerated liquid passage 4 and leacheate passage 2 are fixed in the stainless steel threeway 1, perhaps directly used the threeway or the four-way of PEEK material.This acquisition equipment is because simple in structure, and its cavity volume can reach 200 to 500nL, owing to use negative ion microballoon 3, its withstand voltage reaches 15MPa.
The course of work of the acquisition equipment of carbonate is in the utility model strong base solution; Continuous stream is through leacheate passage 2 under certain flow rate for NaOH or potassium hydroxide or lithium hydroxide strong base solution, and negative ion microballoon 3 is kept apart regenerated liquid passage 4 and leacheate passage 2.Pure water passes through regenerated liquid passage 4 through water inlet pipe 5 continuously under the driving of peristaltic pump or air driven pump.Water inlet pipe is connected the anode of constant current supply; Negative electrode is connected in stainless steel threeway 1; Under electric field action; Carbanion in the leacheate passage 2 gets into regenerated liquid passage 4 through negative ion microballoon 3, and hydrogen ion that in regenerated liquid passage 4, produces owing to water electrolysis and carbanion effect generate carbonic acid, and is carried in the waste liquid bottle by the pure water of continuous flow; The carbanion that in leacheate passage 2, removes owing to water electrolysis generation hydroxide ion balance.
The above only is the preferred implementation of the utility model; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; Can also make some improvement and retouching, these improvement and retouching also should be regarded as the protection domain of the utility model.
Claims (7)
1. the acquisition equipment of carbonate in the strong base solution; Comprise a regenerated liquid passage, a leacheate passage; Spaced-apart between said regenerated liquid passage and the said leacheate passage through an anionic membrane; In said regenerated liquid passage, the direct current negative electrode is set, in said leacheate passage, the direct current anode is set, it is characterized in that: said anionic membrane is sphere or dish type.
2. the acquisition equipment of carbonate in the strong base solution according to claim 1 is characterized in that: in said regenerated liquid passage, be provided with water inlet pipe, said water inlet pipe is as the direct current negative electrode.
3. the acquisition equipment of carbonate in the strong base solution according to claim 2 is characterized in that: said water inlet pipe is the platinum pipe.
4. according to the acquisition equipment of carbonate in each described strong base solution in the claim 1 to 3, it is characterized in that: liquid is pure water in the said regenerated liquid passage, and said strong base solution is NaOH or potassium hydroxide or lithium hydroxide.
5. according to the acquisition equipment of carbonate in each described strong base solution in the claim 1 to 3, it is characterized in that: said anionic membrane is quaternary amine type, tertiary amine-type or secondary amine type.
6. according to the acquisition equipment of carbonate in each described strong base solution in the claim 1 to 3, it is characterized in that: the diameter of said spherical anionic membrane or dish type anionic membrane is 0.5mm to 1mm.
7. according to the acquisition equipment of carbonate in each described strong base solution in the claim 1 to 3, it is characterized in that: said regenerated liquid passage and leacheate passage are fixedly mounted in stainless steel threeway or the PEEK four-way.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201077261U CN202522550U (en) | 2012-03-21 | 2012-03-21 | Device for capturing carbonate radicals in strong alkaline solution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201077261U CN202522550U (en) | 2012-03-21 | 2012-03-21 | Device for capturing carbonate radicals in strong alkaline solution |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202522550U true CN202522550U (en) | 2012-11-07 |
Family
ID=47105493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201077261U Expired - Fee Related CN202522550U (en) | 2012-03-21 | 2012-03-21 | Device for capturing carbonate radicals in strong alkaline solution |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202522550U (en) |
-
2012
- 2012-03-21 CN CN2012201077261U patent/CN202522550U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121107 Termination date: 20130321 |