CN201732063U - Atomizer used for atomic spectrometry based on medium stopping discharge - Google Patents
Atomizer used for atomic spectrometry based on medium stopping discharge Download PDFInfo
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- CN201732063U CN201732063U CN2010202915873U CN201020291587U CN201732063U CN 201732063 U CN201732063 U CN 201732063U CN 2010202915873 U CN2010202915873 U CN 2010202915873U CN 201020291587 U CN201020291587 U CN 201020291587U CN 201732063 U CN201732063 U CN 201732063U
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- dielectric barrier
- spectroscopic analysis
- atomizer
- electrode
- potsherd
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Abstract
The utility model relates to gas atomization equipment, which aims to provide an atomizer used for atomic spectrometry based on medium stopping discharge having simple structure, small volume, low energy consumption, low work temperature and high atomic transmitting efficiency. The atomizer used for atomic spectrometry based on medium stopping discharge comprises a ceramic discharge chamber, electrodes and a gas shielding device, wherein the ceramic discharge chamber is formed by at least two parallel ceramic sheets; a sample gas inlet is arranged at one end of the ceramic discharge chamber, and a sample gas outlet is arranged at the other end of the ceramic discharge chamber; the electrodes are respectively fixed outside the two ceramic sheets; and the gas shielding device is arranged at the outer periphery of the ceramic sheets.
Description
Technical field
The utility model relates to a kind of atomization equipment of gas, particularly relates to a kind of atomizer that is used for the atomic spectroscopic analysis instrument.
Background technology
Atomizer is the important component part of atomic spectrum alanysis instrument, and the height of atomization efficiency is directly connected to the performance of atomic spectroscopic analysis instrument, the analysis detection limit of it and instrument, and precision, stability is directly related.The atomizer that the current atom spectrometric instrument is commonly used has: flame atomizer, electrothermic atomizer and plasma atomizer.Flame atomizer is that the combustion heat energy that utilizes fuel gas buring to discharge heats desolventizing with analytic sample, the fusion evaporation, and atomization, this atomization mode are easy to realization, and is simple in structure, but have the gas dilution effect, and signal response is on the low side; Gas componant complexity in the flame exists tangible spectrum to disturb simultaneously; Atomizer is equivalent to a big well heater, and is obvious to closing on the optics heating effect, is disadvantageous for the instrument long-term working stability.Electrothermic atomizer is based on big electric current and produces 2000-3000 ℃ high temperature by resistance heating, makes sample evaporation and atomization, and common have open atomizer (graphite rod, graphite cup) and two kinds of forms of closed atomizer (graphite-pipe).The electrothermal atomizer is solid sampling directly, need sample few, highly sensitive, temperature is even, the atomization efficiency height, and light path free atom density is big, the free atom retention time is long, be subjected to external interference little, now be widely used in the atomic absorption instrument, but it requires than higher heating and power supply module.Common plasma atomizer is inductively coupled plasma (ICP), its working temperature height, and the atomization ability is strong, and matrix disturbs little, be desirable atomizer, but ICP operating cost height has limited its range of application.Dielectric barrier discharge is a gas discharge under a kind of atmospheric pressure of electrode surface overwrite media, apparent is the gas discharge that evenly fills the air, it is worked under normal pressure, volume is little, and working temperature is low, and energy consumption is low, it is little to utilize the atomizer of dielectric barrier discharge technological development to have size, energy consumption is low, and the advantage that working temperature is low is the prerequisite and the strong guarantee of the miniaturization of analytical instrument.
Disclose at present some atomizers based on dielectric barrier discharge, they one be to adopt glass and quartz to do medium; Atomizer separates with the shielding device, and free atom detects under the protection of quartzy shielding cavity.The shortcoming of this mode is: the glass dielectric coefficient is low, and physical strength is low, and the discharge voltage range that can tolerate is narrow, is easy to take place electric breakdown and causes global failure when discharge condition is changed; Quartz dielectric coefficient height, but difficulty of processing is big, and it is very high to produce the discharge required voltage.
The utility model content
The technical problems to be solved in the utility model provides a kind of simple in structure, volume is little, energy consumption is low, working temperature is low, the atom transfer efficiency is high atomic spectroscopic analysis atomizer based on dielectric barrier discharge.
The utility model is based on the atomic spectroscopic analysis atomizer of dielectric barrier discharge, comprise ceramic discharge chamber, electrode and gas shield assembly, described ceramic discharge chamber is made of at least two parallel potsherds, one end in described ceramic discharge chamber is the sample gas inlet, the other end is the sample gas outlet, described electrode is separately fixed at the outside of two potsherds, and described shroud of gas device is arranged on the periphery of potsherd.
The utility model is based on the atomic spectroscopic analysis atomizer of dielectric barrier discharge, wherein said shroud of gas device is made of double layer sleeve barrel, described potsherd is arranged in the inner sleeve, described outer sleeve is provided with shielding gas inlet tube near an end of sample gas inlet, described shielding gas inlet tube is along the tangential direction setting of outer sleeve, and be connected with the cavity between inner sleeve and the outer sleeve, shielding gas inlet tube links to each other with the shielding source of the gas.
The utility model is based on the atomic spectroscopic analysis atomizer of dielectric barrier discharge, and wherein said ceramic discharge chamber is made of four potsherds, and xsect is rectangle or square, and described electrode is separately fixed at the wherein outside of the potsherd of pair of parallel.
The utility model is based on the atomic spectroscopic analysis atomizer of dielectric barrier discharge, and the discharge spacing of wherein said electrode is 1.5mm to 5mm.
The utility model is based on the atomic spectroscopic analysis atomizer of dielectric barrier discharge, and wherein said electrode is a silk ribbon shape electrode, fixes by bonding mode and potsherd.
The utility model is based on the atomic spectroscopic analysis atomizer of dielectric barrier discharge, and wherein said electrode is the coat film electrode, fixes by mode and the potsherd that applies.
The utility model is based on the atomic spectroscopic analysis atomizer of dielectric barrier discharge, but the power supply of wherein said electrode is the AC power of voltage regulation and frequency modulation, and output voltage is 5000 volts to 20000 volts, and frequency is 10KHz to 200KHz, and waveform is sinusoidal wave.
The utility model is based on the atomic spectroscopic analysis atomizer of dielectric barrier discharge, and wherein said potsherd is aluminium oxide ceramics, zirconia ceramics or boron nitride ceramics, and the distance between the potsherd is 0.5mm to 4mm.
The utility model is based on the atomic spectroscopic analysis atomizer of dielectric barrier discharge, and wherein said shielding gas is argon gas, helium or nitrogen.
The utility model is that with the atomizer difference from prior art the utility model adopts potsherd to do medium based on the atomic spectroscopic analysis of dielectric barrier discharge with atomizer based on the atomic spectroscopic analysis of dielectric barrier discharge, pottery can compression molding, easy to process, the required input voltage that discharges is low, only get final product operate as normal with 5 to 30 watts power input, working temperature is less than 50 ℃, and is little to adjacent instrument component influence, is convenient to the integrated and miniaturization of instrument; The dielectric coefficient of pottery can assign to regulate by changing over simultaneously, is convenient to take place under various conditions electric resonance, and the discharge power maximum; Ceramic discharge chamber and gas shield assembly structurally are integrated together, and the free atom oxygen of getting along well in transmission course in the atmosphere is had an effect, and guarantees that the atom transfer efficiency is the highest.
Below in conjunction with accompanying drawing the atomic spectroscopic analysis based on dielectric barrier discharge of the present utility model is described further with atomizer.
Description of drawings
Fig. 1 is the utility model is used atomizer based on the atomic spectroscopic analysis of dielectric barrier discharge a front view;
Fig. 2 is the utility model is used atomizer based on the atomic spectroscopic analysis of dielectric barrier discharge a vertical view.
Embodiment
As depicted in figs. 1 and 2, the utility model comprises ceramic discharge chamber 1, electrode 2 and gas shield assembly based on the atomic spectroscopic analysis of dielectric barrier discharge with atomizer.Ceramic discharge chamber 1 is made of four potsherds 3, xsect is rectangle or square, potsherd 3 is aluminium oxide ceramics, zirconia ceramics or boron nitride ceramics, distance between the potsherd 3 is 0.5mm to 4mm, one end in ceramic discharge chamber 1 is a sample gas inlet 4, and the other end is sample gas outlet 5.Electrode 2 is a silk ribbon shape electrode, is separately fixed at wherein two outsides that parallel potsherd 3 by bonding mode, and electrode 2 also can be the coat film electrode, fixes by mode and the potsherd 3 that applies, and the discharge spacing of electrode 2 is 1.5mm to 5mm.But the power supply 9 of electrode 2 is the AC power of voltage regulation and frequency modulation, and output voltage is 5000 volts to 20000 volts, and frequency is 10KHz to 200KHz, and waveform is sinusoidal wave.
The shroud of gas device is made of double layer sleeve barrel, ceramic discharge chamber 1 is arranged in the inner sleeve 6, outer sleeve 7 is provided with shielding gas inlet tube 8 near an end of sample gas inlet 4, shielding gas inlet tube 8 is along the tangential direction setting of outer sleeve 7, and be connected with the cavity between inner sleeve 6 and the outer sleeve 7, shielding gas inlet tube 8 links to each other with shielding source of the gas (not shown), and shielding gas is argon gas, helium or nitrogen.
Example one:
With xsect of the sticking system of alumina ceramic plate is rectangular discharge cavity, the sticking aluminium foil in the potsherd outside is done electrode, electrode separation 1.5mm, finish making according to Fig. 1 structure, feed helium that 500ml/ divides as discharge gas at sample gas inlet, shielding gas is the helium that 800ml/ divides, energized, regulate discharge frequency and be 15000 volts of 20KHz and sparking voltages, under power input 15W condition, in discharge cavity, form uniformly and discharges.The utility model atomizer is installed on the atomic fluorescence spectrometer, with arsenic element as detected object, adopt helium as discharge gas, the hydride that system produces is brought into region of discharge, native system has very high sensitivity to arsenic, signal is linear change with sample concentration, to the range of linearity of arsenic is: 0.5ug/L-500ug/L.
Example two:
With positive square discharge cavity of the sticking system of zirconia ceramics sheet, the gluing silk ribbon shape copper foil electrode in outside, electrode separation 3.5mm finishes making according to Fig. 1 structure, feed argon gas that 300ml/ divides as discharge gas at sample gas inlet, shielding gas is the argon gas that 800ml/ divides.Energized is regulated discharge frequency and is 12000 volts of 50KHz and input voltages, under power input 12W condition, finds the vaporific discharge that formation is filled the air in the discharge cavity.The utility model atomizer is installed on the atomic fluorescence spectrometer, with the selenium element as detected object, adopt argon gas as discharge gas, the hydride that system produces is brought into region of discharge, native system has very high sensitivity to selenium, signal is linear change with sample concentration, to the range of linearity of selenium is: 0.5ug/L-500ug/L.
Example three:
Apply into electrode shape at boron nitride ceramics sheet single face with Jinsui River, calcination appropriate time in high temperature furnace, form electroded potsherd, glue then and make a rectangle discharge cavity, electrode separation is 3mm, finish making according to Fig. 1 structure, feed nitrogen that 800ml/ divides as discharge gas at sample gas inlet, shielding gas is the nitrogen that 800ml/ divides.Energized is regulated discharge frequency and is 15500 volts of 25KHz and input voltages, under power input 18W condition, finds the discharge of formation even dispersion in the discharge cavity.The utility model atomizer is installed on the atomic fluorescence spectrometer, with lead element as detected object, adopt nitrogen as discharge gas, the hydride that system is produced is written into region of discharge, native system has very high sensitivity to lead, signal is linear change with sample concentration, to the range of linearity of lead is: 0.5ug/L-500ug/L.
Above-described embodiment is described preferred implementation of the present utility model; be not that scope of the present utility model is limited; under the prerequisite that does not break away from the utility model design spirit; various distortion and improvement that those of ordinary skills make the technical solution of the utility model all should fall in the definite protection domain of the utility model claims.
Claims (9)
1. atomic spectroscopic analysis atomizer based on dielectric barrier discharge, it is characterized in that: comprise ceramic discharge chamber (1), electrode (2) and gas shield assembly, described ceramic discharge chamber (1) is made of at least two parallel potsherds (3), one end in described ceramic discharge chamber (1) is a sample gas inlet (4), the other end is sample gas outlet (5), described electrode (2) is separately fixed at the outside of two potsherds (3), and described shroud of gas device is arranged on the periphery of potsherd (3).
2. the atomic spectroscopic analysis atomizer based on dielectric barrier discharge according to claim 1, it is characterized in that: described shroud of gas device is made of double layer sleeve barrel, described potsherd (3) is arranged in the inner sleeve (6), described outer sleeve (7) is provided with shielding gas inlet tube (8) near an end of sample gas inlet (4), described shielding gas inlet tube (8) is along the tangential direction setting of outer sleeve (7), and be connected with the cavity between inner sleeve (6) and the outer sleeve (7), shielding gas inlet tube (8) links to each other with the shielding source of the gas.
3. the atomic spectroscopic analysis atomizer based on dielectric barrier discharge according to claim 2, it is characterized in that: described ceramic discharge chamber (1) is made of four potsherds (3), xsect is rectangle or square, and described electrode (2) is separately fixed at the wherein outside of the potsherd of pair of parallel (3).
4. the atomic spectroscopic analysis atomizer based on dielectric barrier discharge according to claim 3 is characterized in that: the discharge spacing of described electrode (2) is 1.5mm to 5mm.
5. the atomic spectroscopic analysis atomizer based on dielectric barrier discharge according to claim 4 is characterized in that: described electrode (2) is a silk ribbon shape electrode, fixes by bonding mode and potsherd (3).
6. the atomic spectroscopic analysis atomizer based on dielectric barrier discharge according to claim 4 is characterized in that: described electrode (2) is the coat film electrode, fixes by mode and the potsherd (3) that applies.
7. according to claim 5 or 6 described atomic spectroscopic analysis atomizers based on dielectric barrier discharge, it is characterized in that: the power supply (9) of described electrode (2) but be the AC power of voltage regulation and frequency modulation, output voltage is 5000 volts to 20000 volts, frequency is 10KHz to 200KHz, and waveform is sinusoidal wave.
8. the atomic spectroscopic analysis atomizer based on dielectric barrier discharge according to claim 7 is characterized in that: described potsherd (3) is aluminium oxide ceramics, zirconia ceramics or boron nitride ceramics, and the distance between the potsherd (3) is 0.5mm to 4mm.
9. the atomic spectroscopic analysis atomizer based on dielectric barrier discharge according to claim 8 is characterized in that: described shielding gas is argon gas, helium or nitrogen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2010202915873U CN201732063U (en) | 2010-08-13 | 2010-08-13 | Atomizer used for atomic spectrometry based on medium stopping discharge |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010202915873U CN201732063U (en) | 2010-08-13 | 2010-08-13 | Atomizer used for atomic spectrometry based on medium stopping discharge |
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| CN201732063U true CN201732063U (en) | 2011-02-02 |
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| CN2010202915873U Expired - Fee Related CN201732063U (en) | 2010-08-13 | 2010-08-13 | Atomizer used for atomic spectrometry based on medium stopping discharge |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102325422A (en) * | 2011-09-13 | 2012-01-18 | 青岛佳明测控仪器有限公司 | Flat plate type totally-sealed low-temperature plasma excitation source |
| CN102519917A (en) * | 2011-12-13 | 2012-06-27 | 清华大学 | Dielectric barrier discharge based solid sample denudation method and device thereof |
-
2010
- 2010-08-13 CN CN2010202915873U patent/CN201732063U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102325422A (en) * | 2011-09-13 | 2012-01-18 | 青岛佳明测控仪器有限公司 | Flat plate type totally-sealed low-temperature plasma excitation source |
| CN102519917A (en) * | 2011-12-13 | 2012-06-27 | 清华大学 | Dielectric barrier discharge based solid sample denudation method and device thereof |
| CN102519917B (en) * | 2011-12-13 | 2014-03-12 | 清华大学 | Dielectric barrier discharge based solid sample denudation method and device thereof |
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Legal Events
| Date | Code | Title | Description |
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| 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: 20110202 Termination date: 20130813 |