CN203941874U - On-the-spot ion source device under atmospheric pressure - Google Patents
On-the-spot ion source device under atmospheric pressure Download PDFInfo
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- CN203941874U CN203941874U CN201420387013.4U CN201420387013U CN203941874U CN 203941874 U CN203941874 U CN 203941874U CN 201420387013 U CN201420387013 U CN 201420387013U CN 203941874 U CN203941874 U CN 203941874U
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- 238000003384 imaging method Methods 0.000 description 4
- 238000004949 mass spectrometry Methods 0.000 description 4
- 238000001819 mass spectrum Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005281 excited state Effects 0.000 description 1
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Abstract
The utility model provides on-the-spot ion source device under a kind of atmospheric pressure, and described ion source device comprises: the first cavity, and described the first cavity has import, and inner hollow; Discharge device, discharge device is arranged in described the first cavity; The second cavity, described the second inside cavity hollow, and be communicated with described the first cavity; The ratio R of the internal diameter of the first cavity and the second cavity
1/ R
2be more than or equal to 1.5, and be less than or equal to 20; The outlet of described the second cavity is as ion outlet; Described internal diameter is for covering the minimum diameter of a circle in the cross section perpendicular to axial direction of cavity; Product d * P of depth d in described the first cavity, the pressure P of gas is more than or equal to 1mPa, and is less than or equal to 20mPa.The utlity model has discharge stability, reproducible, spatial resolution is high, highly sensitive, can analyze the advantages such as low concentration sample.
Description
Technical field
The utility model relates to mass spectral analysis, particularly on-the-spot ion source device under atmospheric pressure.
Background technology
At present, in the on-the-spot ion source of existing atmospheric pressure, in ion generation area, there is discharge instability, the deficiency such as gas flow rate range is narrow, high energy particle generation rate is low, easy sparking, and have that sensitivity is low during analytic sample, poor repeatability, spatial resolution are not high, be difficult for the deficiencies such as mass spectrum imaging.
Therefore, how providing on-the-spot ion source under a discharge stability, highly sensitive atmospheric pressure is that the technical problem solving is badly in need of in this area.
Utility model content
In order to solve the deficiency in above-mentioned prior art scheme, the utility model provides a kind of good condensing performance, highly sensitive, discharge stability, reproducible, spatial resolution is high, can analyze on-the-spot ion source device under the atmospheric pressure of low concentration sample.
The purpose of this utility model is achieved through the following technical solutions:
An on-the-spot ion source device under atmospheric pressure, described ion source device comprises:
The first cavity, described the first cavity has import, and inner hollow;
Discharge device, discharge device is arranged in described the first cavity;
The second cavity, described the second inside cavity hollow, and be communicated with described the first cavity; The ratio R of the internal diameter of the first cavity and the second cavity
1/ R
2be more than or equal to 1.5, and be less than or equal to 20; The outlet of described the second cavity is as ion outlet; Described internal diameter is for covering the minimum diameter of a circle in the cross section perpendicular to axial direction of cavity;
Product d * P of depth d in described the first cavity, the pressure P of gas is more than or equal to 1mPa, and is less than or equal to 20mPa.
According to above-mentioned ion source device, alternatively, described ion source device further comprises:
The 3rd cavity, the entrance point of described the 3rd cavity is communicated with described the first cavity, and the port of export is communicated with described the second cavity, and the internal diameter from entrance point to the port of export diminishes gradually.
According to above-mentioned ion source device, preferably, the length of described the second cavity is 5-20mm.
According to above-mentioned ion source device, preferably, the internal diameter of the ion outlet of described the second cavity is 0.5-3mm.
According to above-mentioned ion source device, preferably, described discharge device is high-field electrode.
According to above-mentioned ion source device, alternatively, described ion source device further comprises:
Adjustment module, described adjustment module is for adjusting the diameter of described ion outlet.
According to above-mentioned ion source device, preferably, described the 3rd inside cavity is cavity frustum.
Compared with prior art, the beneficial effect the utlity model has is:
1, adopt the first relatively large cavity, expanded discharge space, gas is evenly distributed in space, discharges more stable, and system repeatability is better;
2, reduce inside cavity operating pressure, reduce operating pressure, contribute to promote arcing distance, prevent from puncturing in the course of work sparking;
3, the aperture of guiding (ion outlet) output ion, the outgoing of small-bore, not only improves the concentration of excited state ion, makes the ion of sample more easily focus on and enter into mass spectrometry system, thereby promote sensitivity and resolution, can also be by regulating the aperture of outgoing to go to regulate;
4, adjustable air pressure input, due to the cushioning effect of the first larger cavity of volume, electric discharge can be not destroyed, for the sample of low concentration, can pass through adjustable pressure, improves Ionization Efficiency.
Accompanying drawing explanation
With reference to accompanying drawing, disclosure of the present utility model will be easier to understand.Those skilled in the art hold intelligible: these accompanying drawings are only for illustrating the technical solution of the utility model, and are not intended to protection range of the present utility model to be construed as limiting.In figure:
Fig. 1 is the structural representation of the ion source device of the utility model embodiment 1;
Fig. 2 is the front view of Fig. 1.
Embodiment
Fig. 1,2 and following declarative description optional execution mode of the present utility model with instruction those skilled in the art, how to implement and to reproduce the utility model.In order to instruct technical solutions of the utility model, simplified or omitted some conventional aspects.Those skilled in the art should understand that be derived from the modification of these execution modes or replace will be in scope of the present utility model.Those skilled in the art should understand that following characteristics can combine to form a plurality of modification of the present utility model in every way.Thus, the utility model is not limited to following optional execution mode, and only by claim and their equivalent, is limited.
Embodiment 1:
Fig. 1,2 has schematically provided the structure diagram of on-the-spot ion source device under the atmospheric pressure of the utility model embodiment, and as shown in Figure 1, 2, described ion source device comprises:
The first cavity 11, described the first cavity has import, and inner hollow, as is tubular;
Discharge device, discharge device is arranged in described the first cavity; Described discharge device can adopt high-field electrode, high energy uviol lamp or other discharge device, and this is all the state of the art;
The second cavity 21, described the second inside cavity hollow, and be communicated with described the first cavity; The ratio R of the internal diameter of the first cavity and the second cavity
1/ R
2be more than or equal to 1.5, and be less than or equal to 20; The outlet of described the second cavity is as ion outlet 22; Described internal diameter is for covering the minimum diameter of a circle in the cross section perpendicular to axial direction of cavity;
Product d * P of depth d in described the first cavity, the pressure P of gas is more than or equal to 1mPa, and is less than or equal to 20mPa.
In order to make to be connected preferably between the first larger cavity and less the second cavity, transition, alternatively, described ion source device further comprises:
The 3rd cavity 31, the entrance point of described the 3rd cavity is communicated with described the first cavity, and the port of export is communicated with described the second cavity, and the internal diameter from entrance point to the port of export diminishes gradually.The inside of the 3rd cavity and and the first cavity, the second cavity between joint face all level and smooth, ion is successfully entered in the second cavity, if the inside of the 3rd cavity is cavity frustum from the first cavity;
In order to regulate the focusing performance of outgoing ion, the aperture of described ion outlet is adjustable, and concrete regulative mode is the state of the art.
The method of work of on-the-spot ion source device under upper atmospheric pressure, described work comprises the following steps:
Described discharge device electric discharge, gas is ionized;
Regulate gas pressure intensity in described the first cavity, the second cavity and/or the aperture of ion outlet;
Described ion, successively by described the first cavity, the second cavity, finally penetrates from described ion outlet.
Embodiment 2:
According to on-the-spot ion source device and method of work thereof the application examples in mass spectrometry system under the atmospheric pressure of embodiment 1.
In this application examples, the first cavity and the second cavity all adopt cylinder-like structure, and the 3rd cavity is cavity frustum structure, for connecting the first cavity and the second cavity.High-field electrode is arranged in described the first cavity, and the diameter of the first cavity is 10mm, and length is 20mm; The diameter of the second cavity is 0.5mm, and length is 20mm.Described the first cavity, the second cavity, the 3rd inside cavity are communicated with, and inner gas pressure intensity is adjustable, but the product of the length of pressure P and the first cavity is more than or equal to 1mPa, and are less than or equal to 20mPa.
The course of work of above-mentioned ion source device comprises the following steps:
Under the effect of high-field electrode, the gas in the first cavity is ionized;
Regulate the pressure P of gas in the first cavity, but the product of the length of pressure P and the first cavity is more than or equal to 1mPa, and is less than or equal to 20mPa, make to meet discharge stability, high, the highly sensitive requirement of Ionization Efficiency;
Ion, successively through the first cavity, the 3rd cavity, the second cavity, finally penetrates from the ion outlet of the second cavity, for follow-up mass spectrum imaging.
The benefit reaching according to the utility model embodiment 2 is: discharge stability, Ionization Efficiency high (analysis low concentration sample), highly sensitive.
Embodiment 3:
According to on-the-spot ion source device and method of work thereof the application examples in mass spectrometry system under the atmospheric pressure of embodiment 1.
In this application examples, the first cavity and the second cavity all adopt cylinder-like structure, and the 3rd cavity is cavity frustum structure, for connecting the first cavity and the second cavity.High-field electrode is arranged in described the first cavity, and the diameter of the first cavity is 4.5mm, and length is 10mm; The diameter of the second cavity is 3mm, and length is 5mm.Described the first cavity, the second cavity, the 3rd inside cavity are communicated with, and inner gas pressure intensity is adjustable, but the product of the length of pressure P and the first cavity is more than or equal to 1mPa, and are less than or equal to 20mPa.
The course of work of above-mentioned ion source device comprises the following steps:
Under the effect of high-field electrode, the gas in the first cavity is ionized;
Regulate the pressure P of gas in the first cavity, but the product of the length of pressure P and the first cavity is more than or equal to 1mPa, and is less than or equal to 20mPa, make to meet discharge stability, high, the highly sensitive requirement of Ionization Efficiency;
Ion, successively through the first cavity, the 3rd cavity, the second cavity, finally penetrates from the ion outlet of the second cavity, for follow-up mass spectrum imaging.
The benefit reaching according to the utility model embodiment 3 is: discharge stability, Ionization Efficiency high (analysis low concentration sample), highly sensitive.
Embodiment 4:
According to on-the-spot ion source device and method of work thereof the application examples in mass spectrometry system under the atmospheric pressure of embodiment 1.
In this application examples, the first cavity and the second cavity all adopt square tubular structure, and the 3rd cavity is cavity frustum structure, for connecting the first cavity and the second cavity.High energy uviol lamp is arranged in described the first cavity, and the diameter of the first cavity is 30mm, and length is 45mm; The diameter of the second cavity is 2mm, and length is 10mm.Described the first cavity, the second cavity, the 3rd inside cavity are communicated with, and inner gas pressure intensity is adjustable, but the product of the length of pressure P and the first cavity is more than or equal to 1mPa, and are less than or equal to 20mPa.The outlet aperture of the second cavity is adjustable.
The course of work of above-mentioned ion source device comprises the following steps:
Under the effect of high energy uviol lamp, the gas in the first cavity is ionized;
Regulate the pressure P of gas and the outlet aperture of the second cavity in the first cavity, but the product of the length of pressure P and the first cavity is more than or equal to 1mPa, and is less than or equal to 20mPa, make to meet discharge stability, high, the highly sensitive requirement of Ionization Efficiency;
Ion, successively through the first cavity, the 3rd cavity, the second cavity, finally penetrates from the ion outlet of the second cavity, for follow-up mass spectrum imaging.
The benefit reaching according to the utility model embodiment 4 is: discharge stability, Ionization Efficiency high (analysis low concentration sample), highly sensitive.
Claims (7)
1. an on-the-spot ion source device under atmospheric pressure, is characterized in that: described ion source device comprises:
The first cavity, described the first cavity has import, and inner hollow;
Discharge device, discharge device is arranged in described the first cavity;
The second cavity, described the second inside cavity hollow, and be communicated with described the first cavity; The ratio R of the internal diameter of the first cavity and the second cavity
1/ R
2be more than or equal to 1.5, and be less than or equal to 20; The outlet of described the second cavity is as ion outlet; Described internal diameter is for covering the minimum diameter of a circle in the cross section perpendicular to axial direction of cavity;
Product d * P of depth d in described the first cavity, the pressure P of gas is more than or equal to 1mPa, and is less than or equal to 20mPa.
2. ion source device according to claim 1, is characterized in that: described ion source device further comprises:
The 3rd cavity, the entrance point of described the 3rd cavity is communicated with described the first cavity, and the port of export is communicated with described the second cavity, and the internal diameter from entrance point to the port of export diminishes gradually.
3. ion source device according to claim 1, is characterized in that: the length of described the second cavity is 5-20mm.
4. ion source device according to claim 1, is characterized in that: the internal diameter of the ion outlet of described the second cavity is 0.5-3mm.
5. ion source device according to claim 1, is characterized in that: described discharge device is high-field electrode.
6. ion source device according to claim 1, is characterized in that: described ion source device further comprises:
Adjustment module, described adjustment module is for adjusting the diameter of described ion outlet.
7. ion source device according to claim 2, is characterized in that: described the 3rd inside cavity is cavity frustum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420387013.4U CN203941874U (en) | 2014-07-05 | 2014-07-05 | On-the-spot ion source device under atmospheric pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420387013.4U CN203941874U (en) | 2014-07-05 | 2014-07-05 | On-the-spot ion source device under atmospheric pressure |
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| Publication Number | Publication Date |
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| CN203941874U true CN203941874U (en) | 2014-11-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420387013.4U Expired - Lifetime CN203941874U (en) | 2014-07-05 | 2014-07-05 | On-the-spot ion source device under atmospheric pressure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104078297A (en) * | 2014-07-05 | 2014-10-01 | 宁波大学 | Atmospheric pressure on-site ion source device and working method thereof |
-
2014
- 2014-07-05 CN CN201420387013.4U patent/CN203941874U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104078297A (en) * | 2014-07-05 | 2014-10-01 | 宁波大学 | Atmospheric pressure on-site ion source device and working method thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20151210 Address after: 201103 No. 900, Changning District, Shanghai, West Yan'an Road Patentee after: Wen Luhong Patentee after: Ningbo University Asset Management Co.,Ltd. Address before: 315211 Fenghua Road 818, Zhejiang, Ningbo Patentee before: Ningbo University |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20151230 Address after: 315100, D building, room 655, Kexin building, 304-311 bachelor Road, Ningbo, Zhejiang, Yinzhou District Patentee after: CHINA INNOVATION INSTRUMENT Co.,Ltd. Address before: 201103 No. 900, Changning District, Shanghai, West Yan'an Road Patentee before: Wen Luhong Patentee before: Ningbo University Asset Management Co.,Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20141112 |
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| CX01 | Expiry of patent term |