CN2399719Y - Microwave thermal atomizer - Google Patents
Microwave thermal atomizer Download PDFInfo
- Publication number
- CN2399719Y CN2399719Y CN 99256617 CN99256617U CN2399719Y CN 2399719 Y CN2399719 Y CN 2399719Y CN 99256617 CN99256617 CN 99256617 CN 99256617 U CN99256617 U CN 99256617U CN 2399719 Y CN2399719 Y CN 2399719Y
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- microwave
- atomizer
- pipe
- around pipe
- resonant cavity
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Abstract
The utility model belongs to a sampling and sample eliminating device for atomic spectrum analysis, which comprises a resonant cavity unit and an atomizer unit, wherein, the resonant cavity unit is a resonant cavity of which the inner surface is coated with a silver film; the resonant cavity is connected with a microwave generator; the atomizer unit is formed by connecting a hollow polytetrafluoroethylene wound tube (3) with a quartz capillary tube (5) by a polytetrafluoroethylene joint (4); the other end of the wound tube (3) is connected with a peristaltic pump. By coupling the resonant cavity, energy is provided for an atomizer. Thus, sample solution in the atomizer is atomized or eliminated. The utility model has the advantages of small volume, high efficiency and low consumed power, and can be used for sample introduction, sample online elimination, etc.
Description
The utility model belongs to sample introduction used in a kind of atomic spectroscopic analysis and Specimen eliminating device.
In atomic spectroscopic analysis, sampling technique is the key factor that restriction sensitivity improves always.At present, the sampling technique that often uses mainly is the atomizing sample introduction and the electric heating evaporation sample introduction of sample solution.The sample solution atomization method is then mainly used pneumatic nebulization and ultrasonic atomizatio method.
Bordera once reported a kind of microwave thermal atomizer for 3578 pages at U.S. " Analytical Chemistry " 1997 69 volume, employing be the focused microwave stove, whole device volume is big, the microwave energy utilization factor is low, need high power (＞300W) could work down.
Purpose of the present invention is exactly in order to overcome the above-mentioned shortcoming and the weak point of the microwave thermal atomizer that document reports, adopt resonator cavity to replace the focused microwave stove, microwave energy is coupled in the sample solution in the kapillary, because the resonator cavity volume is little, coupling efficiency is high, so under low-power (60W), get final product work, entire device is also compact more, has overcome the shortcoming that microwave thermal atomizer volume is big, power demand is high of reported in literature, is convenient to and various spectral instrument couplings.
The structure of microwave thermal atomizer of the present utility model is different with existing focused microwave stove formula atomizer.It is made of microwave cavity and the atomiser unit that is placed in the resonator cavity.Said microwave cavity is connected with microwave generator by joint.The microwave cavity middle body is a cylindrical space, is used to the atomiser unit of packing into.Said atomiser unit includes around pipe, peristaltic pump, kapillary, wherein is the polyfluortetraethylene pipe of hollow, coiled around pipe; Peristaltic pump is connected to the end around pipe, is used to pump into sample solution, and kapillary then is connected to the other end around pipe, is used to make the sample solution atomizing to be gasoloid.
Microwave thermal atomizer described in the utility model, its heating principle are based on rotation of the dipole in the solution and ion migration under the microwave action.When shining with microwave radiation around pipe, because quartz or teflon absorb microwave hardly around tube wall, microwave has penetrability again, so the whole sample flow of liquid will be heated with same speed, also, add around tube wall it is cold, so determinand promptly from not having thermograde to liquid stream central authorities around tube wall, be sample, the probability that deposition is come out on the tube wall of exit just has been greatly diminished.Therefore, this microwave thermal atomizer can be applied to high in salt easily even resemble in the emulsion class sample solution.In addition, because the thicker quartz capillary of available internal diameter, so also needn't can satisfy the requirement of transfusion with common peristaltic pump with high-pressure pump.
Below in conjunction with description of drawings concrete structure of the present utility model.
Fig. 1 is the microwave cavity synoptic diagram, and Fig. 2 is the synoptic diagram of core atomizer of the present invention.
Microwave thermal atomizer of the present utility model is made up of two unit, and these two unit are resonator cavity unit and atomiser unit.
The resonator cavity unit can be a TM
010Type cylindrical cavity, its inside surface can be silver-plated to increase microwave reflection efficient, 1 is the shank of resonator cavity and microwave generator among the figure, the 2nd, the middle body of resonator cavity, microwave energy mainly are coupled to this position.Atomiser unit comprises that teflon is around pipe 3, teflon joint 4, plated film quartz capillary 5.
The continuous polyfluortetraethylene pipe that teflon can be selected internal diameter 0.5-1.0mm for use around pipe 3, coiling forms again.Its winding method is, from an end of polyfluortetraethylene pipe, make it self parallel folding three to five times, the folding about 3cm of length closely twines the polyfluortetraethylene pipe that is left in the outside of three to five sections parallel pipes then.The width that twines is about 2.5cm.Joint 4 is the tight junctions that cooperated by the nut of teflon rod processing and screw, the central bore of its thread part, make a end pass this hole around pipe, around this port of pipe it is turned up with the electric soldering iron heating then, its nut one end boring, quartz capillary is worn in the centre, then screw and nut is screwed to together, just can make around pipe and quartz capillary and combine closely, link to each other with sample solution by peristaltic pump tube around the another port of pipe 3.
In use, atomiser unit is inserted in the middle body 2 of resonator cavity, the raw material band by outside atomizer, twining teflon (or with hard glass or quartz socket tube) thus the external diameter that changes atomizer makes its stationkeeping in the cylindrical space of resonator cavity middle body 2.Sample solution by peristaltic pump pump into teflon in pipe 3, when after pipe is full of sample solution in 3, applying microwave power.Reach at microwave power and promptly can observe the aerocolloidal formation of tangible sample solution more than the 50W.This microwave thermal atomizer also can carry out in-line digestion with some biological samples easily.For example, will be with color is very dark after the nitric acid acidifying, viscosity is very big commodity orange juice and iced tea solution by behind this atomizer, solution colour promptly disappears, and viscosity is near aqueous solution.
Because the resonator cavity volume is little, atomizer does not only influence sample introduction and microwave heating by forming around the pipe coiling, does not promptly influence atomizing effect, and whole device volume is diminished.Because the coiling atomizer, the atomizing circuit is long, can make microwave be coupled to the resonator cavity middle body again, so power demand is lower, and nebulization efficiency improves.Because determinand does not deposit in the exit, can be used for the test of sample high in salt.This microwave thermal atomizer is introduced and there are very big using value and popularizing application prospect widely in aspect such as sample in-line digestion at sample.
Claims (3)
1. microwave thermal atomizer, structure comprises microwave generator, it is characterized in that, structure also includes microwave cavity and atomiser unit;
Said microwave cavity is connected with microwave generator by joint (1), and microwave cavity middle body (2) is a cylindrical space;
Said atomiser unit includes around pipe (3), peristaltic pump, kapillary (5), is the polyfluortetraethylene pipe coiled of hollow around pipe (3); Peristaltic pump is connected to the end around pipe (3), and kapillary (5) is connected to the other end around pipe (3).
2. according to the described microwave thermal atomizer of claim 1, it is characterized in that, in the said atomiser unit, around pipe (3) is a polyfluortetraethylene pipe, parallel three sections of central authorities, it is outer closely to twine, kapillary (5) be connected by a teflon joint (4) around pipe (3) one ends.
3. according to claim 1 or 2 described microwave thermal atomizers, it is characterized in that said hollow space internal diameter around pipe (3) is 0.5-1.0mm; Said microwave resonance inner cavity surface is silver-plated, and kapillary (5) is the plated film quartz ampoule.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99256617 CN2399719Y (en) | 1999-12-10 | 1999-12-10 | Microwave thermal atomizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99256617 CN2399719Y (en) | 1999-12-10 | 1999-12-10 | Microwave thermal atomizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2399719Y true CN2399719Y (en) | 2000-10-04 |
Family
ID=34039695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99256617 Expired - Fee Related CN2399719Y (en) | 1999-12-10 | 1999-12-10 | Microwave thermal atomizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2399719Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101226119B (en) * | 2008-01-30 | 2010-06-02 | 吉林大学 | Dynamic loop microwave auxiliary clear-up device |
| CN114993783A (en) * | 2022-05-26 | 2022-09-02 | 吉林大学 | Sample preparation device and method for detecting plastic additive |
| WO2023004677A1 (en) * | 2021-07-29 | 2023-02-02 | 深圳麦克韦尔科技有限公司 | Aerosol generating device |
-
1999
- 1999-12-10 CN CN 99256617 patent/CN2399719Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101226119B (en) * | 2008-01-30 | 2010-06-02 | 吉林大学 | Dynamic loop microwave auxiliary clear-up device |
| WO2023004677A1 (en) * | 2021-07-29 | 2023-02-02 | 深圳麦克韦尔科技有限公司 | Aerosol generating device |
| CN114993783A (en) * | 2022-05-26 | 2022-09-02 | 吉林大学 | Sample preparation device and method for detecting plastic additive |
| CN114993783B (en) * | 2022-05-26 | 2023-07-14 | 吉林大学 | Sample preparation device and method for plastic additive detection |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |