CN110797252B - Atmospheric glow discharge ion source device - Google Patents
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- CN110797252B CN110797252B CN201810863960.9A CN201810863960A CN110797252B CN 110797252 B CN110797252 B CN 110797252B CN 201810863960 A CN201810863960 A CN 201810863960A CN 110797252 B CN110797252 B CN 110797252B
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Abstract
The invention provides an atmospheric pressure glow discharge ion source device, which is a high-pass atmospheric pressure open type ion source device applicable to mass spectrometry. The device includes: a first T-shaped three-way valve and a second T-shaped three-way valve; an atmospheric glow discharge generation region disposed on the first T-shaped three-way valve; inputting carrier gas and a sample to be analyzed into the atmospheric pressure glow discharge generation area and arranging the carrier gas/sample input end of the second T-shaped three-way valve; a cooling system for cooling the atmospheric glow discharge generation zone; the ion transmission channel is used for receiving and transmitting the ionization products generated in the atmospheric pressure glow discharge region; and the power supply system is used for providing electric energy for the discharge of the atmospheric pressure glow discharge generation area.
Description
Technical Field
The invention belongs to the field of mass spectrometry, relates to the technical field of mass spectrometry ion source devices, and particularly relates to an atmospheric pressure glow discharge ion source device.
Background
With the rapid development of national economic construction and social life, a new challenge is provided for the current analysis and test technology. The mass spectrum is used as a core technical means for analyzing the components and the structures of the substances, is between the analysis characteristics of high sensitivity and high resolution, and opens a convenient window for the identification and the structural analysis of the complex substances. How to introduce analytes into mass spectra in the form of suitable ions, i.e. ion sources, is directly related to the analytical performance of the mass spectra and the field of analysis. The inductive coupling plasma hard ionization technology with high ionization energy can ensure the sufficient ionization of trace elements in a target analyte, and has high sensitivity, small mass spectrum interference and high accuracy when being applied to aspects of element qualitative and quantitative analysis, isotope ratio determination and the like. However, a large amount of inert gas is consumed, the volume is large, the power consumption is high, and meanwhile, high ionization energy enables some molecules or molecular polymers and the like to enter a mass spectrum in a naked element ion form, so that the structural integrity of the molecules or molecular polymers cannot be guaranteed. Soft ionization techniques that achieve mild ionization are desirable at this time. The particular ionization technique must therefore be selected for the analyte properties and the analytical requirements, which adds some complexity to the process of substance analysis.
The atmospheric pressure open type ion source has become a research hotspot of the current ion source by virtue of the advantages of rapid, in-situ, real-time sample ionization and the like. The microplasma generated by the atmospheric pressure glow discharge has the condition of being constructed as an atmospheric pressure open type ion source, the size of the generated microplasma is limited to millimeter magnitude or even lower, and the discharge characteristic of the atmospheric pressure glow discharge microplasma can be obviously changed by tuning the discharge condition and adding auxiliary reagents. On one hand, partial elements can be ionized, and on the other hand, the integrity of molecules and complex structures can be ensured, which is not possessed by other normal-pressure open-type ion sources. In the prior art, microplasma generated by atmospheric glow discharge is exposed in an atmospheric environment, and when the microplasma is applied to element detection, the ionization efficiency of elements is low due to the low energy density. Meanwhile, the ion generation and ion transmission design of the atmospheric pressure glow discharge device are adaptive to the ion acquisition design of the mass spectrum, so that the transmission efficiency of ions from the glow discharge part to the mass spectrum detection part is low, and the further improvement of the analysis performance is limited to a certain extent.
In summary, how to improve the ionization performance of the atmospheric pressure glow discharge device for different substances when the atmospheric pressure glow discharge device is applied to mass spectrometry is improved by aiming at the characteristics of mass spectrometry, and the realization of the high-sensitivity and high-selectivity analysis of multiple analytes by using a single portable low-power-consumption ion source is a key problem to be solved in the field at present.
Disclosure of Invention
In view of the above, an object of the present invention is to provide an atmospheric pressure glow discharge ion source apparatus, which is a high-throughput atmospheric pressure ambient ion source apparatus applicable to mass spectrometry. In order to achieve the purpose, the invention provides the following technical scheme:
an atmospheric pressure glow discharge ion source apparatus, the apparatus comprising:
a first T-shaped three-way valve and a second T-shaped three-way valve;
an atmospheric glow discharge generation region disposed on the first T-shaped three-way valve;
inputting carrier gas and a sample to be analyzed into the atmospheric pressure glow discharge generation area and arranging the carrier gas/sample input end of the second T-shaped three-way valve;
a cooling system for cooling the atmospheric glow discharge generation zone;
the ion transmission channel is used for receiving and transmitting the ionization products generated in the atmospheric pressure glow discharge region; and
and the power supply system is used for providing electric energy for the discharge of the atmospheric pressure glow discharge generation area.
The invention optimally designs the ion generation and ion transmission of the atmospheric pressure glow discharge micro-plasma device, improves the ionization efficiency and the ion transmission efficiency of the atmospheric pressure glow discharge ion source when being applied to mass spectrometry, and ensures the ionization performance of different analytes. The invention has simple structure and high integration level. The ion source can effectively ionize a plurality of analytes simultaneously by using a single portable low-power-consumption ion source. Preferably, in the above atmospheric pressure glow discharge ion source apparatus, the atmospheric pressure glow discharge generation region includes a first high temperature-resistant quartz tube, a second high temperature-resistant quartz tube having a different size from the first high temperature-resistant quartz tube, a hollow electrode, and a hollow counter electrode.
Preferably, in the above atmospheric pressure glow discharge ion source device, in the atmospheric pressure glow discharge generation region, the hollow electrode is embedded in a first high temperature resistant quartz tube with a matched size, and the outer wall of the hollow electrode is attached to the inner wall of the first high temperature resistant quartz tube. More preferably, the inner diameter of the first high-temperature resistant quartz tube is 1.4-1.8 mm, and the outer diameter is 2.8-3.2 mm.
According to the invention, the hollow electrode of the atmospheric glow discharge generation area is embedded in the high-temperature-resistant quartz tube with the adaptive size, so that the effective volume of glow discharge is limited, and the discharge energy density is effectively improved.
Preferably, in the above atmospheric pressure glow discharge ion source apparatus, the atmospheric pressure glow discharge generation region adopts a second high temperature resistant quartz tube to fix the first high temperature resistant quartz tube embedded with the hollow electrode and the hollow counter electrode into a whole, and keeps the hollow electrode and the hollow counter electrode coaxial. More preferably, the inner diameter of the second high-temperature resistant quartz tube is 2.8-3.2 mm, and the outer diameter is 3.8-4.2 mm.
By means of the design of the atmospheric pressure glow discharge generating area, the high integration level of the atmospheric pressure glow discharge area is ensured, and meanwhile, the transmission efficiency of the ionization product is ensured by enabling the hollow electrode and the hollow counter electrode to be coaxial.
Preferably, in the above atmospheric pressure glow discharge ion source apparatus, the atmospheric pressure glow discharge generation region uses an inert gas (He or Ar) as a discharge medium for the atmospheric pressure glow discharge and a sample transport carrier gas.
With this, the inert gas used in the present invention provides a certain medium base for triggering and maintaining the atmospheric pressure glow discharge microplasma, and generates stable microplasma.
Preferably, in the above atmospheric pressure glow discharge ion source apparatus, the ion transmission channel is a hollow counter electrode in the atmospheric pressure glow discharge generation region, and the hollow counter electrode is simultaneously used as a counter electrode in the atmospheric pressure glow discharge generation region and a transmission channel of the ionization product.
In the invention, the hollow counter electrode in the atmospheric glow discharge generation area is simultaneously used as an ion transmission channel, so that the transmission path of ions is shortened, and meanwhile, the stability of the ions in the transmission process is ensured and the transmission efficiency of the ions is obviously improved based on the higher temperature of the counter electrode.
Preferably, in the above atmospheric pressure glow discharge ion source apparatus, the first T-shaped three-way valve adopts a PTFE (polytetrafluoroethylene for short) tube with a suitable size to fix the atmospheric pressure glow discharge generation region at one end of the first T-shaped three-way valve close to the second T-shaped three-way valve.
By means of the method, the integration level of the whole device is improved to a certain extent.
Preferably, in the above atmospheric pressure glow discharge ion source apparatus, the cooling system cools by introducing cooling gas between the outer high temperature-resistant quartz tube installed at one end of the first T-shaped three-way valve and the high temperature-resistant quartz tube embedded with the hollow electrode.
In the invention, the cooling system ensures that the hollow electrode and the hollow counter electrode are not excessively worn under high-intensity discharge.
Preferably, in the above atmospheric pressure glow discharge ion source device, the carrier gas/sample input end carries a gas sample through a carrier gas and enters the atmospheric pressure glow discharge generation region, the liquid sample is transmitted to the atmospheric pressure glow discharge generation region through a high temperature resistant quartz capillary tube by an injection pump, and the high temperature resistant quartz capillary tube is arranged at one end of the second T-shaped three-way valve through a PTFE tube with a suitable size.
With this, the carrier gas/sample input end of the present invention ensures that the gas sample as well as trace liquid samples can enter the atmospheric pressure glow discharge generation zone. Preferably, in the above atmospheric pressure glow discharge ion source apparatus, the atmospheric pressure glow discharge generation region is connected in series with a current stabilizing resistor having a resistance of about 2.5 to 12k Ω, and the hollow electrode is directly contacted with the hollow counter electrode to trigger generation of the atmospheric pressure glow discharge microplasma.
By means of the resistance, the current-stabilizing resistor avoids the phenomenon that the arc is converted into the electric arc in the process of generating the atmospheric pressure glow discharge micro-plasma by the contact triggering of the hollow electrode and the hollow counter electrode, and meanwhile, the stability of the atmospheric pressure glow discharge micro-plasma is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments are briefly described below. The drawings described below are merely exemplary embodiments of the present invention, and those skilled in the relevant art can also obtain other drawings based on the drawings provided.
FIG. 1 is a schematic diagram of the overall structure of an atmospheric pressure glow discharge ion source apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the internal structure of the glow discharge generation region of the atmospheric pressure glow discharge ion source apparatus according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of the internal structure of the carrier gas/sample input end of the atmospheric pressure glow discharge ion source apparatus according to one embodiment of the present invention;
reference numerals:
1-high temperature resistant quartz capillary; 2-polyethylene T-type three-way valves (second T-type three-way valves); 3-a hollow electrode; 4-a PTFE tube; 5-stainless steel T-shaped three-way valves (first T-shaped three-way valves); 6-a first high temperature resistant quartz tube; 7-a second high temperature resistant quartz tube; 8-outer side high temperature resistant quartz tube; 9-hollow counter electrode; 10-a PTFE tube; 11-a PTFE tube; 12-mass spectrum sampling cone mouth; 13-a high voltage power supply; 14-current-stabilizing resistor; 15-copper wire; 16-sample transfer silicone tubing; 17-a syringe pump; 18-gas line; 19-gas flow meter.
Detailed Description
The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the invention are shown and described, and which are to be considered illustrative of the invention only, and not restrictive.
As shown in fig. 1 to 3, an atmospheric glow discharge ion source apparatus according to an embodiment of the present invention includes: a polyethylene T-shaped three-way valve 2 and a stainless steel T-shaped three-way valve 5 which are used for fixing and connecting the elements of the device; the atmospheric glow discharge generation area is arranged at one end of the stainless steel T-shaped three-way valve 5 and mainly comprises a hollow electrode 3, a first high-temperature-resistant quartz tube 6, a second high-temperature-resistant quartz tube 7 and a hollow counter electrode 9; the carrier gas/sample input end is arranged on a polyethylene T-shaped three-way valve 2, and a section of hollow electrode 3 extending out of the atmospheric pressure glow discharge generation area is arranged at one end of the polyethylene T-shaped three-way valve 2 to communicate the carrier gas/sample input end with the atmospheric pressure glow discharge generation area; the ion transmission channel is a hollow counter electrode 9, and ions generated in the atmospheric pressure glow discharge generation area are directly transmitted to the mass spectrum sampling cone mouth 12 from the discharge area through the ion transmission channel; the outer high-temperature-resistant quartz tube 8 is arranged at one end of the stainless steel T-shaped three-way valve 5, and cooling gas is input between the outer high-temperature-resistant quartz tube 8 and the first high-temperature-resistant quartz tube 6.
In this embodiment, as shown in fig. 1 and fig. 2, the hollow electrode 3 with the inner and outer diameters of 1.1 and 1.6mm respectively in the atmospheric glow discharge generation region is embedded in the first high temperature resistant quartz tube 6 with the inner and outer diameters of 1.6 and 3 mm respectively, the outer wall of the hollow electrode 3 is tightly attached to the inner wall of the first high temperature resistant quartz tube 6, and meanwhile, the port of the hollow electrode 3 is kept to be limited within the port of the first high temperature resistant quartz tube 6 by 2-6 mm. The inner diameter of the hollow counter electrode 9 is equal to or slightly larger than the inner diameter of the first high-temperature-resistant quartz tube 6, the outer diameter of the hollow counter electrode 9 is the same as the outer diameter of the first high-temperature-resistant quartz tube 6, the port of the hollow counter electrode 9 facing the hollow electrode 3 is kept to be tightly attached to the port of the first high-temperature-resistant quartz tube 6, and the fact that glow discharge generated in the atmospheric pressure glow discharge generation area is bound in the limited volume of the first high-temperature-resistant quartz tube 6 is guaranteed. The second high temperature resistant quartz capsule 7 that the external diameter is 3 and 4 mm respectively keeps the inner wall of second high temperature resistant quartz capsule 7 closely laminating simultaneously with the outer wall of first high temperature resistant quartz capsule 6 and hollow counter electrode 9 in the outside of first high temperature resistant quartz capsule 6 and hollow counter electrode 9 in the installation, guarantees that the embedded first high temperature resistant quartz capsule 6 and the coaxial setting of hollow counter electrode 9 that have hollow electrode 3. The first high temperature resistant quartz tube 6 embedded with the hollow electrode 3 is arranged at one end of the stainless steel T-shaped three-way valve 5 through a PTFE (polytetrafluoroethylene, for short) tube 4 with an inner diameter and an outer diameter of 3.0 mm and 6.0 mm respectively, the outer side quartz tube 8 is arranged at the other end of the stainless steel T-shaped three-way valve 5, and the hollow counter electrode 9 is kept to be capable of extending to the outer side of the port of the outer side quartz tube 8 by 3-6 mm. The PTFE material has the characteristics of corrosion resistance, high temperature resistance, non-adhesion, electrical insulation and the like, and is more suitable for the use requirements of the atmospheric pressure glow discharge ion source device provided by the embodiment.
In addition, a hollow electrode 3 extending from the left end of a stainless steel T-shaped three-way valve 5 is disposed at one end of the polyethylene T-shaped three-way valve 2 close to the stainless steel T-shaped three-way valve 5 by using PTFE tubes 11 having inner and outer diameters of 1.6 and 6mm, respectively, and the hollow electrode 3 having a limited length is extended into the polyethylene T-shaped three-way valve 2, so that the carrier gas/sample input end is communicated with the atmospheric pressure glow discharge generation region, as shown in fig. 3, and the carrier gas/sample input end and the atmospheric pressure glow discharge generation region are integrated.
In this embodiment, the high temperature resistant quartz capillary tube 1 with inner and outer diameters of 0.35 and 0.5 mm is disposed at one end of the polyethylene T-shaped three-way valve 2 away from the stainless steel T-shaped three-way valve 5, and is fixed to the polyethylene T-shaped three-way valve by using the PTFE tube 10 with an adaptive size, so as to keep the high temperature resistant quartz capillary tube 1 and the hollow electrode 3 coaxially disposed, and ensure that the end of the high temperature resistant quartz capillary tube 1 is located outside the port of the hollow electrode 3. By providing the atmosphere pressure glow discharge generation region with a carrier gas for the atmosphere pressure glow discharge generation by communicating the gas flow meter 19 with the gas line 18, the gas sample can enter the atmosphere pressure glow discharge generation region together with the carrier gas. Meanwhile, a sample transmission silicone tube 16 is used for connecting the high-temperature-resistant quartz capillary tube 1 with an injection pump 17, and the liquid sample is stably transmitted to an atmospheric pressure glow discharge generation area at a certain flow rate without pulsation, as shown in fig. 3.
Preferably, the carrier gas supplied by the carrier gas/sample input to the atmospheric pressure glow discharge generating region is He gas. The atmospheric pressure glow discharge generated by the He gas as a medium is columnar, which is beneficial to the effective ionization of the analyte. However, the carrier gas may be an inert gas such as Ar gas.
In this embodiment, a copper wire 15 wrapped with an insulating material is connected to the hollow electrode 3 and the hollow counter electrode 9 extending to the outside of the port of the outer high temperature resistant quartz tube 8, a current stabilizing resistor 14 with a resistance of approximately 2.5 to 12k Ω is connected in series between the two electrodes, and then the two electrodes are respectively connected to the positive and negative electrodes of the high voltage power supply 13, and the high voltage power supply 13 outputs a certain voltage (the voltage is related to the resistance of the series resistor) to provide a certain high voltage for the generation of the atmospheric glow discharge in the atmospheric glow discharge generation region.
Preferably, when the high voltage power supply 13 outputs a certain high voltage between the hollow electrode 3 and the hollow counter electrode 9, the stable carrier gas flow rate is provided between the hollow electrode 3 and the hollow counter electrode 9 in the atmospheric pressure glow discharge generation region (>60 mL∙min-1) When in use, the hollow electrode 3 is directly contacted with the hollow counter electrode 9 to trigger the generation of atmospheric pressure glow discharge microplasma. The current stabilizing resistor ensures that the discharge between the hollow electrode 3 and the hollow counter electrode 9 is transited into electric arc on one hand, and simultaneously prevents a circuit from generating short circuit when the hollow electrode 3 is contacted with the hollow counter electrode 9.
In this embodiment, the working process of the atmospheric glow discharge ion source device is as follows: headFirst, the carrier gas/sample input end passes through a gas flow meter 19 to adapt the gas flow rate (>60 mL∙min-1) And a certain amount of He gas is supplied to an atmospheric glow discharge generation area as a discharge medium, a high-voltage power supply 13 outputs a certain high voltage to the hollow electrode 3 and the hollow counter electrode 9, and the polyethylene T-shaped three-way valve 2 is pushed to move towards the stainless steel T-shaped three-way valve 5, so that the hollow electrode 3 fixed on the polyethylene T-shaped three-way valve 2 approaches to the hollow counter electrode 9 until the two electrodes can be in direct contact. After micro-plasma is generated by triggering the electrodes, the distance between the hollow electrode 3 and the hollow counter electrode 9 is restored to a proper distance by pushing the polyethylene T-shaped three-way valve 2, and then the atmospheric glow discharge micro-plasma can be generated and stably maintained. And adjusting the flow of cooling gas between the first high-temperature-resistant quartz tube 6 and the outer high-temperature-resistant quartz tube 8 according to the atmospheric glow discharge intensity. The sample may then be introduced into the atmospheric pressure glow discharge generation zone by means of a syringe pump 17 at the carrier gas/sample input or with the carrier gas. The ionization products generated in the atmospheric pressure glow generation zone are transported to the mass spectrum sampling cone mouth 12 along the hollow counter electrode 9 under the action of the carrier gas.
In conclusion, the atmospheric pressure glow discharge ion source device provided by the embodiment has a simple structure, and simultaneously adopts the first high temperature resistant quartz tube 6 to limit the effective volume of the generated atmospheric pressure glow discharge, thereby improving the discharge energy density to a certain extent. Meanwhile, the hollow counter electrode 9 is used as a discharge electrode and a transmission channel of ions, so that the transmission path of the ions is effectively shortened, and the stability of an ionization product in the transmission process is effectively improved based on the higher temperature of the counter electrode, so that the atmospheric pressure glow discharge ion source device is more suitably applied to the field of mass spectrometry.
The invention provides an atmospheric pressure glow discharge ion source device, which comprises a polyethylene T-shaped three-way valve, a stainless steel T-shaped three-way valve, a carrier gas/sample to be analyzed input end, a high temperature resistant quartz tube with a matched size, an atmospheric pressure glow discharge generation area and an ion transmission channel. The polyethylene/stainless steel T-shaped three-way valve is used for fixing all parts of the whole ion source and integrating all parts of the atmospheric pressure glow discharge ion source into a whole. The carrier gas/sample input end and the atmospheric pressure glow discharge generation area work in a matched mode, and the carrier gas input provides a medium foundation for the generation of the atmospheric pressure glow discharge. The ion transmission channel transmits ions generated in the atmospheric pressure glow discharge generation area to the mass spectrum. When the atmospheric pressure glow discharge ion source device works, the hollow electrode of the atmospheric pressure glow discharge generation area is embedded in the high-temperature-resistant quartz tube with the adaptive size, and the volume of glow discharge is bound. Under high intensity discharge conditions, the hollow electrode and the hollow counter electrode are cooled by a cooling system. The hollow counter electrode in the atmospheric glow discharge generation area is simultaneously used as an ion transmission channel.
The present invention may be embodied in several forms without departing from the spirit of the essential characteristics thereof, and the present invention is therefore to be considered in all respects as illustrative and not restrictive. For example, the polyethylene T-shaped three-way valve 2 is used as the second T-shaped three-way valve in the above embodiment, but the material may be polytetrafluoroethylene, stainless steel, iron, or other materials; in the above embodiment, the stainless steel T-shaped three-way valve 5 is used as the first T-shaped three-way valve, but the material may be polytetrafluoroethylene, polyethylene, iron, or other materials; in the above embodiment, the first high temperature resistant quartz tube 6, the second high temperature resistant quartz tube 7 and the outer high temperature resistant quartz tube 8 are used, but high temperature resistant materials such as alumina can be used instead of the quartz tube; in the above embodiment, the copper wire 15 is used, but a material having a high electric conductivity, such as silver or iron, may be used as the wire; in the above embodiment, the PTFE tube 4, the PTFE tube 10, and the PTFE tube 11 are used, but materials such as polypropylene, perfluoroethylene propylene, and the like which are corrosion resistant may be used.
Since the scope of the invention is defined by the claims rather than the specification, and all changes that come within the meaning and range of equivalency of the claims are intended to be embraced therein.
Claims (9)
1. An atmospheric pressure glow discharge ion source apparatus, comprising:
a first T-shaped three-way valve and a second T-shaped three-way valve;
the atmospheric pressure glow discharge generating region is arranged on the first T-shaped three-way valve and comprises a first high-temperature-resistant quartz tube, a second high-temperature-resistant quartz tube with the size different from that of the first high-temperature-resistant quartz tube, a hollow electrode and a hollow counter electrode, the hollow electrode is embedded in the first high-temperature-resistant quartz tube with the size matched with that of the hollow electrode, and the first high-temperature-resistant quartz tube with the hollow electrode embedded in the hollow electrode is fixed with the hollow counter electrode into a whole by the second high-temperature-resistant quartz tube;
inputting carrier gas and a sample to be analyzed into the atmospheric pressure glow discharge generation area and arranging the carrier gas/sample input end of the second T-shaped three-way valve;
a cooling system for cooling the atmospheric glow discharge generation zone;
the ion transmission channel is used for receiving and transmitting the ionization products generated in the atmospheric pressure glow discharge region; and
and the power supply system is used for providing electric energy for the discharge of the atmospheric pressure glow discharge generation area.
2. The atmospheric-pressure glow discharge ion source apparatus according to claim 1,
in the atmospheric pressure glow discharge generation area, the outer wall of the hollow electrode is attached to the inner wall of the first high-temperature-resistant quartz tube.
3. The atmospheric-pressure glow discharge ion source apparatus according to claim 1,
the hollow electrode and the hollow counter electrode are coaxial.
4. The atmospheric-pressure glow discharge ion source apparatus according to claim 1,
the atmospheric glow discharge generating area adopts inert gas as a discharge medium of atmospheric glow discharge and a sample transmission carrier gas.
5. The atmospheric-pressure glow discharge ion source apparatus according to claim 1,
the ion transmission channel is a hollow counter electrode in the atmospheric pressure glow discharge generation area, and the hollow counter electrode is simultaneously used as a counter electrode of the atmospheric pressure glow discharge generation area and a transmission channel of an ionization product.
6. The atmospheric-pressure glow discharge ion source apparatus according to claim 1,
the first T-shaped three-way valve adopts a PTFE pipe with adaptive size to fix the atmospheric pressure glow discharge generation area at one end of the first T-shaped three-way valve close to the second T-shaped three-way valve.
7. The atmospheric-pressure glow discharge ion source apparatus according to claim 1,
and the cooling system is used for cooling by introducing cooling air between the high-temperature-resistant quartz tube arranged at the outer side of one end of the first T-shaped three-way valve and the high-temperature-resistant quartz tube embedded with the hollow electrode.
8. The atmospheric-pressure glow discharge ion source apparatus according to claim 1,
and the carrier gas/sample input end carries a gas sample into the atmospheric pressure glow discharge generation area through a carrier gas, a liquid sample is transmitted to the atmospheric pressure glow discharge generation area through a high-temperature-resistant quartz capillary tube by an injection pump, and the high-temperature-resistant quartz capillary tube is arranged at one end of the second T-shaped three-way valve through a PTFE tube with a matched size.
9. The atmospheric-pressure glow discharge ion source apparatus according to any one of claims 1 to 8,
the atmospheric glow discharge generation area is connected in series with a current stabilizing resistor with the resistance value of 2.5-12 k omega, and the hollow electrode is directly contacted with the hollow counter electrode to trigger and generate atmospheric glow discharge micro-plasma.
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