CN203787386U - Ion enrichment introducing apparatus of atmospheric pressure ion source time-of-flight mass spectrometer - Google Patents
Ion enrichment introducing apparatus of atmospheric pressure ion source time-of-flight mass spectrometer Download PDFInfo
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- CN203787386U CN203787386U CN201420132573.5U CN201420132573U CN203787386U CN 203787386 U CN203787386 U CN 203787386U CN 201420132573 U CN201420132573 U CN 201420132573U CN 203787386 U CN203787386 U CN 203787386U
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- 238000010884 ion-beam technique Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
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Abstract
The utility model relates to an ion enrichment introducing apparatus of an atmospheric pressure ion source time-of-flight mass spectrometer. The apparatus comprises an enrichment apparatus and a repulsion apparatus, wherein ions successively pass through the enrichment apparatus and the repulsion apparatus. The enrichment apparatus comprises an airtight cavity and a radio-frequency four-level rod is arranged in the airtight cavity. Two ends of the radio-frequency four-level rod are a first electrode provided with an ion inlet and a second electrode provided with an ion outlet. The first electrode is connected to a direct current power supply. The second electrode is connected to a high-voltage pulse power supply. Through introducing the high-voltage pulse power supply to the second electrode and switching of high and low level of the high-voltage pulse power supply, release of the ions is controlled so as to realize ion enrichment. Through adjustment of a pulse width, enrichment time and lead-out time of the ions are adjusted, a detection quality scope of an instrument is increased. The more the ion enrichment is, the higher the instrument sensitivity is. The apparatus can be used for introducing the ion enrichment of the atmospheric pressure ion source time-of-flight mass spectrometer.
Description
Technical field
The utility model relates to time-of-flight mass spectrometer, particularly relates to a kind of ion enrichment introducing device of atmospheric pressure ionizationion time-of-flight mass spectrometer.
Background technology
The ion transfer of atmospheric pressure ionizationion time-of-flight mass spectrometer and drawing-in system use quadrupole rod and many group electrostatic lens conventionally.First ion can enter molecular ion reactor (MIR), through preliminary focus on laggard enter radiofrequency quadrupole (RFQ), colliding cooling rear ion kinetic energy close to heat energy value with background air molecule, follow cooled ion and accelerate to enter DC static quadrupole rod (DCQ) and one dimension einzel lens.Ion beam is modulated into flat pattern by DCQ and one dimension simple lens system, effectively reduces ion energy and disperse, and can control the incident direction of ion beam, makes up to a certain extent the rigging error between ion modulation transmissions district and analyzer.The ion transfer of this routine and drawing-in system are through development for many years, and technology is day by day ripe, applies also more and more extensive.
Conventional atmospheric pressure ionizationion time-of-flight mass spectrometer adopts continuous input mode conventionally, be that sample is continuously input to instrument, and adopt the time of flight mass analyzer of pulse repulsion mode can lose part ion in the time of work, because ion is pushed into analyzer in the time that repulsion pulse is high level, in the time that repulsion pulse is low level, ion can pass repulsion district, until next repulsion high level arrives.Add that again conventional ion transfer and drawing-in system only play transmission ion, can not enrichment ion, the instrument insufficient sensitivity that will seem in the time that sample concentration is too low like this.
Utility model content
In order to overcome above-mentioned technical problem, the purpose of this utility model be to provide a kind of can enrichment object ion, improve ion enrichment introducing device and the method for the atmospheric pressure ionizationion time-of-flight mass spectrometer of time-of-flight mass spectrometer sensitivity and resolution.
The technical scheme that the utility model adopts is:
A kind of ion enrichment introducing device of atmospheric pressure ionizationion time-of-flight mass spectrometer, comprise enriching apparatus and repulsion device that ion passes through successively, described enriching apparatus comprises closed cavity, in described closed cavity, be provided with radio frequency level Four bar, the two ends of described radio frequency level Four bar are the second electrode that is provided with the first electrode of ion entrance and is provided with ion outlet, on described the first electrode, be connected to DC power supply, on described the second electrode, be connected to high-voltage pulse power source.
As the further improvement of technique scheme, described radio frequency level Four bar comprises four round bars that are parallel to each other, and between adjacent round bar, is provided with square bar, axially the having angle of the relative round bar of described square bar, and described each square bar is connected to DC power supply.
As the further improvement of technique scheme, between described enriching apparatus and repulsion device, be provided with successively static quadrupole rod and one dimension einzel lens.
The beneficial effects of the utility model are: the utility model is by introducing high-voltage pulse power source at the second electrode, the release of the switching controls ion by the high and low level of high-voltage pulse power source, thereby realize the enrichment of ion, adjustment by pulsewidth regulates the enrichment time of ion and draws the time, improve the detection mass range of instrument, and ion enrichment is more, the sensitivity of instrument is higher.
Brief description of the drawings
Below in conjunction with drawings and embodiments, the utility model is further illustrated.
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the utility model radio frequency level Four bar schematic diagram;
Fig. 3 is that the utility model radio frequency level Four bar powers up mode schematic diagram;
Fig. 4 is that the utility model the first electrode and the second electrode power up mode schematic diagram.
Embodiment
The present embodiment is the transformation based on conventional art, as shown in Figure 1, comprises ion ion reactor 1, radiofrequency quadrupole 2, DC static quadrupole rod 3, one dimension einzel lens 4 and the repulsion district of process successively.Ion beam is modulated into flat pattern by DC static quadrupole rod 3 and one dimension einzel lens 4, effectively reduces ion energy and disperse.
As shown in Figures 2 and 3, radiofrequency quadrupole 2 is made up of four round bars 21 and four square bars 22, four round bars 21 and four square bars 22 are fixed on three fixing circle seats, radiofrequency quadrupole 2 entirety are placed in the long cylinder of a cylindrical metal material, both sides are respectively the first electrode 5 and the second electrode 6, form thus a sealing chamber, the chamber internal gas pressure of this sealing chamber is at 10E
-3torr left and right.Wherein the center of the first electrode 5 is provided with ion inlet orifice, and the center of the second electrode 6 is provided with ion outlet.Four round bar 21 axially parallels, and relative round bar 21 is connected to each other by wire, is strapped in chamber cooling ion by applying radio-frequency voltage.Four square bars 22 all relatively axis form an angle,, when apply direct voltage on square bar 22 time, due to distance between tie rods difference, will on axis, produce different voltage influences, thereby can form axial accelerating field.Four round bars 21, four square bars 22, the first electrode 5, the second electrode 6 and cylinder mutual insulating, be connected and fixed by the insulation PEEK pad of high pressure resistant high temperature.
In order to obtain the effect of enrichment, as shown in Figure 4, the first electrode 5 is connected to fixing DC power supply 7, the second electrode 6 is connected to high-voltage pulse power source 8, this high-voltage pulse power source 8 forms first via high-voltage pulse signal, and the direct current amplitude applying on the first electrode 5 is higher than the low level of the high-voltage pulse applying on the second electrode 6.First via high-voltage pulse signal frequency range is 1Hz ~ 20kHz, and pulsewidth is 50ns ~ 100us, and rising edge of a pulse is less than 100ns, and amplitude adjustable extent is 0 ~ 200V.
The ion enrichment device using method of the atmospheric pressure ionizationion time-of-flight mass spectrometer of the present embodiment is as follows:
(1) on the round bar 21 of radiofrequency quadrupole 2, apply radio-frequency voltage, on adjacent round bar 21, apply that amplitude is identical, the voltage of opposite direction, on relative round bar 21, apply all the same voltage of amplitude phase place.
(2) on four square bars 22, apply identical direct voltage.
(3) on the first electrode 5, apply DC power supply 7, on the second electrode 6, apply first via high-voltage pulse signal, such the first electrode 5 and the second electrode 6 are just axially forming electric field.
(4) ion enters sealing chamber from the first electrode 5, and collides with the indoor gas molecule of enclosed cavity, and the ion kinetic energy after collision is less than 1ev, and all focuses near axis.In the time that the pulse voltage on the second electrode 6 is high level, the electric field that the first electrode 5 and the second electrode 6 form is reverse, and ion is collected at the exit of the second electrode 6, under the effect of radiofrequency signal and square bar electric field, moves in the second electrode 6 exit concussions.In the time that the pulse voltage on the second electrode 6 is low level, the ion beam of enrichment flies out from the second electrode 6 outlets under the effect of electric field force, enters in DC static quadrupole rod 3 and one dimension einzel lens 4, and then ion beam enters repulsion district 9.
To sum up, the principle of the present embodiment is: by applying fixing DC power supply at the first electrode 5, on the second electrode 6, apply high-voltage pulse power source, make to form between the first electrode 5 and the second electrode 6 electric field of a direction transformation, and the direction of an electric field cycle is adjustable, by the cooling focusing principle of radiofrequency quadrupole 2, ion imprison is enriched in radiofrequency quadrupole 2, by regulating the pulsewidth of the second electrode 6 can regulate the enrichment time of ion and draw the time simultaneously.
The above be the utility model preferred embodiment, it does not form the restriction to the utility model protection range.
Claims (3)
1. the ion enrichment introducing device of an atmospheric pressure ionizationion time-of-flight mass spectrometer, it is characterized in that: comprise enriching apparatus and repulsion device that ion passes through successively, described enriching apparatus comprises closed cavity, in described closed cavity, be provided with radio frequency level Four bar, the two ends of described radio frequency level Four bar are the second electrode that is provided with the first electrode of ion entrance and is provided with ion outlet, on described the first electrode, be connected to DC power supply, on described the second electrode, be connected to high-voltage pulse power source.
2. the ion enrichment introducing device of atmospheric pressure ionizationion time-of-flight mass spectrometer according to claim 1, it is characterized in that: described radio frequency level Four bar comprises four round bars that are parallel to each other, between adjacent round bar, be provided with square bar, axially having angle of the relative round bar of described square bar, and described each square bar is connected to DC power supply.
3. the ion enrichment introducing device of atmospheric pressure ionizationion time-of-flight mass spectrometer according to claim 1 and 2, is characterized in that: between described enriching apparatus and repulsion device, be provided with successively DC static quadrupole rod and one dimension einzel lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420132573.5U CN203787386U (en) | 2014-03-21 | 2014-03-21 | Ion enrichment introducing apparatus of atmospheric pressure ion source time-of-flight mass spectrometer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420132573.5U CN203787386U (en) | 2014-03-21 | 2014-03-21 | Ion enrichment introducing apparatus of atmospheric pressure ion source time-of-flight mass spectrometer |
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| CN203787386U true CN203787386U (en) | 2014-08-20 |
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| CN201420132573.5U Expired - Lifetime CN203787386U (en) | 2014-03-21 | 2014-03-21 | Ion enrichment introducing apparatus of atmospheric pressure ion source time-of-flight mass spectrometer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103903955A (en) * | 2014-03-21 | 2014-07-02 | 广州禾信分析仪器有限公司 | Ion enrichment and lead-in device and method for atmospheric ion source time-of-flight mass spectrometer |
| CN104576290A (en) * | 2014-12-16 | 2015-04-29 | 广西电网有限责任公司电力科学研究院 | Pulse pressurized ion enrichment method |
| CN114005722A (en) * | 2021-12-30 | 2022-02-01 | 浙江迪谱诊断技术有限公司 | Digital ion detection method and device of mass spectrometry detection equipment |
-
2014
- 2014-03-21 CN CN201420132573.5U patent/CN203787386U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103903955A (en) * | 2014-03-21 | 2014-07-02 | 广州禾信分析仪器有限公司 | Ion enrichment and lead-in device and method for atmospheric ion source time-of-flight mass spectrometer |
| CN103903955B (en) * | 2014-03-21 | 2017-01-25 | 广州禾信分析仪器有限公司 | Ion enrichment and lead-in device and method for atmospheric ion source time-of-flight mass spectrometer |
| CN104576290A (en) * | 2014-12-16 | 2015-04-29 | 广西电网有限责任公司电力科学研究院 | Pulse pressurized ion enrichment method |
| CN114005722A (en) * | 2021-12-30 | 2022-02-01 | 浙江迪谱诊断技术有限公司 | Digital ion detection method and device of mass spectrometry detection equipment |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| CP01 | Change in the name or title of a patent holder |
Address after: 510530, A3 building, No. 11, Kaiyuan Avenue, Guangzhou Development Zone, Guangdong third, China Patentee after: GUANGZHOU HEXIN INSTRUMENT Co.,Ltd. Patentee after: KUNSHAN HEXIN MASS SPECTROMETRY TECHNOLOGY Co.,Ltd. Address before: 510530, A3 building, No. 11, Kaiyuan Avenue, Guangzhou Development Zone, Guangdong third, China Patentee before: GUANGZHOU HEXIN ANALYTICAL INSTRUMENT Co.,Ltd. Patentee before: KUNSHAN HEXIN MASS SPECTROMETRY TECHNOLOGY Co.,Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20140820 |