CN212031305U - Solution cathode glow discharge device and glow discharge instrument - Google Patents
Solution cathode glow discharge device and glow discharge instrument Download PDFInfo
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- CN212031305U CN212031305U CN202020634026.2U CN202020634026U CN212031305U CN 212031305 U CN212031305 U CN 212031305U CN 202020634026 U CN202020634026 U CN 202020634026U CN 212031305 U CN212031305 U CN 212031305U
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- glow discharge
- ceramic capillary
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Abstract
The utility model discloses a solution cathode glow discharge device and glow discharge instrument, including ceramic capillary, platinum needle and outer magnetic field, wherein, ceramic capillary overcoat establishes the graphite pipe and links to each other with high voltage direct current power negative pole as the negative pole that discharges, and the platinum needle sets up with the ceramic capillary is coaxial, and the platinum needle links to each other with high voltage direct current power positive pole as the positive pole that discharges, forms plasma through applying high pressure two electrodes to two electrodes and discharges; the external magnetic field comprises two magnets, is arranged between the ceramic capillary tube and the platinum needle, is distributed along the axial direction of the ceramic capillary tube and the platinum needle and is used for forming the external magnetic field; the external magnetic field is arranged on two sides of the plasma formed by the discharge of the platinum needle and the ceramic capillary, so that the detection sensitivity of the metal elements is remarkably improved.
Description
Technical Field
The utility model relates to a plasma spectral analysis technical field especially relates to a solution cathode glow discharge emitter.
Background
The liquid-phase glow discharge is simple to operate and relatively low in cost, can realize in-situ, real-time, on-line and multi-element simultaneous rapid qualitative or quantitative analysis and detection by combining with a spectrometer, has wide application prospects in the aspect of heavy metal detection in the fields of food safety, environmental sanitation, water purification and the like, increasingly attracts people's attention, and becomes one of international hot research subjects of low-temperature plasma. The glow discharge technology of solution cathode is a new electrochemical method for producing non-equilibrium low-temperature plasma in aqueous solution, glow plasma is emitted between metal anode and solution cathode, the metal ion dissolved in solution enters negative glow area and is converted into metal atom, the metal atom is excited to excited state, the excited state is emitted in the form of characteristic spectrum in the transition process to ground state, and then the spectrum can be analyzed to obtain the composition and information of metal ion in solution, for example: chinese patent "CN 203983228U" discloses a liquid phase plasma glow discharge device.
However, in the existing liquid-phase glow discharge device, the detection sensitivity of metal elements and the discharge stability of plasma are poor, so that the device cannot be applied to the detection of trace metal ions in a solution, and the application range of the device has certain limitation.
SUMMERY OF THE UTILITY MODEL
The utility model provides a solution cathode glow discharge device to overcome the problem that mentions in the above-mentioned background content, improve the stability of discharging to metallic element's detectivity and plasma, make its detection that can be applied to trace metal ion in the solution, enlarge its range of application.
In order to achieve the above object, the utility model provides a following scheme:
the first scheme is as follows: providing a solution cathode glow discharge device, a ceramic capillary tube, a platinum needle and a magnet, wherein the ceramic capillary tube is sleeved with a graphite tube outside and is connected with a negative electrode of a high-voltage direct-current power supply through the graphite tube, and one end of the ceramic capillary tube corresponds to the platinum needle; one end of the platinum needle is connected with the positive electrode of the high-voltage direct-current power supply, the other end of the platinum needle corresponds to the ceramic capillary, and the ceramic capillary and the platinum needle are coaxially arranged; and the two magnets are arranged between the ceramic capillary tube and the platinum needle, are distributed along the circumferential direction of the axes of the ceramic capillary tube and the platinum needle, and are used for forming an external magnetic field. Preferably, the ceramic capillary tube is sheathed with a graphite tube.
Preferably, the platinum needle is sleeved with a ceramic tube.
Preferably, the ceramic capillary is disposed below the platinum needle.
Preferably, a waste liquid pool for recovering the electric waste liquid is arranged below the ceramic capillary.
Preferably, a cylindrical table is arranged on the waste liquid pool, and the cylindrical table is connected with the graphite pipe and is used for supporting the graphite pipe.
Preferably, the waste liquid pool is provided with an output hole for the electric waste liquid to flow out.
Scheme II: the glow discharge instrument comprises a solution cathode glow discharge device in the first scheme and a three-dimensional moving platform for adjusting the distance between a ceramic capillary and a platinum needle.
Preferably, the three-dimensional moving platform comprises three manual orthogonal micrometer screw gauges and a clamping arm, the platinum needle and the ceramic tube are fixed on the clamping arm together, the clamping arm is accurately adjusted in the x direction, the y direction and the z direction through the three manual orthogonal micrometer screw gauges, and then the position relation of the platinum needle and the ceramic capillary tube is adjusted, so that the position of the glow plasma is accurately adjusted, and the maximum emission signal is obtained.
The utility model discloses for prior art gain following technological effect:
(1) by placing the discharge plasma in an external magnetic field, the detection sensitivity of the metal elements is remarkably reduced and improved.
(2) The ceramic capillary is selected to improve the stability of discharge.
(3) The platinum needle is arranged in the ceramic tube to form needle-point-like discharge, thereby improving the plasma excitation efficiency.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
FIG. 1 is a schematic view of the structure of the device of the present invention;
wherein, 1-external magnetic field; 2-a waste liquid pool; 3-a ceramic capillary; 4-a graphite tube; 5-platinum needle; 6-ceramic tube.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model aims at providing a solution cathode glow discharge device to overcome the problem mentioned in the above-mentioned background content, improve the stability of discharging to metallic element's detectivity and plasma, make its detection that can be applied to in solution trace metal ion, enlarge its range of application.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
The first embodiment is as follows:
as shown in fig. 1, the present embodiment provides a solution cathode glow discharge device, including a ceramic capillary tube 3, a platinum needle 5 and an external magnetic field 1, wherein a graphite tube 4 is sleeved outside the ceramic capillary tube 3, and is connected to a negative electrode of a high voltage dc power supply through the graphite tube 4 to form a discharge cathode; one end of a platinum needle 5 is connected with the positive electrode of a high-voltage direct-current power supply, and a ceramic tube 6 is sleeved outside the platinum needle to form a discharge anode; the discharge cathode and the discharge anode are coaxial and are oppositely arranged (arranged in the position shown in figure 1), the high-voltage direct-current power supply applies high voltage to the two electrodes, and plasma discharge is formed between the two electrodes; the external magnetic field 1 comprises two magnets, is arranged between the ceramic capillary tube 3 and the platinum needle 5 and is distributed along the axial direction of the ceramic capillary tube 3 and the platinum needle 5; by placing the external magnetic field 1 on both sides of the plasma formed by the discharge of the platinum needle 5 and the ceramic capillary 3, the detection sensitivity of the metal elements is significantly reduced and improved.
Furthermore, in the discharge anode, the platinum needle 5 is arranged in the ceramic tube 6 to form needle-like point discharge, thereby improving the plasma excitation efficiency.
Further, the ceramic capillary tube 3 is arranged below the platinum needle 5, a waste liquid pool 2 for recovering the electric waste liquid is also arranged below the ceramic capillary tube 3, a cylindrical table is arranged on the waste liquid pool 2, and the cylindrical table is connected with the graphite tube 4 and is used for supporting the graphite tube 4; and an output hole for the electric waste liquid to flow out is arranged on the waste liquid pool 2.
Example two:
the embodiment provides a glow discharge instrument, which comprises a solution cathode glow discharge device in the first embodiment and a three-dimensional moving platform used for adjusting the distance between a ceramic capillary and a platinum needle, wherein the three-dimensional moving platform is improved based on an orthogonal two-dimensional moving platform, on the basis of the original adjustment in the x direction and the y direction through two manual orthogonal micrometer calipers, the manual orthogonal micrometer calipers in the z direction are additionally arranged on the moving platform of the orthogonal two-dimensional moving platform, a clamping arm is arranged on the orthogonal micrometer calipers in the z direction, the platinum needle and the ceramic tube are fixed on an adjusting arm together, the position relation between the platinum needle and the ceramic capillary is accurately adjusted in the x direction, the y direction and the z direction through the three manual orthogonal micrometer calipers, the position of a glow plasma is accurately adjusted, and the maximum emission signal is obtained.
The utility model discloses a concrete example is applied to explain the principle and the implementation mode of the utility model, and the explanation of the above example is only used to help understand the method and the core idea of the utility model; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.
Claims (8)
1. A solution cathode glow discharge device comprising: a ceramic capillary tube, a platinum needle and a magnet, wherein,
a graphite tube is sleeved outside the ceramic capillary tube and is connected with the negative electrode of the high-voltage direct-current power supply through the graphite tube, and one end of the ceramic capillary tube corresponds to the platinum;
one end of the platinum needle is connected with the positive electrode of the high-voltage direct-current power supply, the other end of the platinum needle corresponds to the ceramic capillary, and the ceramic capillary and the platinum needle are coaxially arranged;
the two magnets are arranged between the ceramic capillary tube and the platinum needle, are distributed along the circumferential direction of the axis of the ceramic capillary tube and the axis of the platinum needle, and are used for forming an external magnetic field.
2. A solution cathode glow discharge apparatus as claimed in claim 1, wherein: and a ceramic tube is sleeved outside the platinum needle.
3. A solution cathode glow discharge apparatus as claimed in claim 1, wherein: the ceramic capillary tube is disposed below the platinum needle.
4. A solution cathode glow discharge apparatus as claimed in claim 2, wherein: and a waste liquid pool for recovering the electric waste liquid is arranged below the ceramic capillary.
5. A solution cathode glow discharge apparatus according to claim 4, wherein: a cylindrical table is arranged on the waste liquid pool; the cylindrical table is connected with the graphite pipe and is used for supporting the graphite pipe.
6. A solution cathode glow discharge apparatus according to claim 4, wherein: and the waste liquid pool is provided with an output hole for the electric waste liquid to flow out.
7. A glow discharge instrument is characterized in that: the cathode glow discharge device of the solution as claimed in any one of claims 2 or 4 to 6, and a three-dimensional moving platform for adjusting the position relationship of the ceramic capillary and the platinum needle.
8. A glow discharge apparatus as claimed in claim 7, wherein: the three-dimensional moving platform comprises three manual orthogonal micrometer screw gauges and a clamping arm, the platinum needle and the ceramic tube are fixed on the clamping arm together, the clamping arm is accurately adjusted in the x direction, the y direction and the z direction through the three manual orthogonal micrometer screw gauges, and then the position relation of the platinum needle and the ceramic capillary tube is adjusted, so that the position of glow plasma is accurately adjusted, and the maximum emission signal is obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020634026.2U CN212031305U (en) | 2020-04-24 | 2020-04-24 | Solution cathode glow discharge device and glow discharge instrument |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020634026.2U CN212031305U (en) | 2020-04-24 | 2020-04-24 | Solution cathode glow discharge device and glow discharge instrument |
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| Publication Number | Publication Date |
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| CN212031305U true CN212031305U (en) | 2020-11-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020634026.2U Expired - Fee Related CN212031305U (en) | 2020-04-24 | 2020-04-24 | Solution cathode glow discharge device and glow discharge instrument |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113504188A (en) * | 2021-06-02 | 2021-10-15 | 中国科学院上海硅酸盐研究所 | Semi-closed system magnetic confinement liquid cathode glow discharge device |
-
2020
- 2020-04-24 CN CN202020634026.2U patent/CN212031305U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113504188A (en) * | 2021-06-02 | 2021-10-15 | 中国科学院上海硅酸盐研究所 | Semi-closed system magnetic confinement liquid cathode glow discharge device |
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