CN202502980U - A Bipolar Reflective Time-of-Flight Mass Analyzer - Google Patents
A Bipolar Reflective Time-of-Flight Mass Analyzer Download PDFInfo
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- CN202502980U CN202502980U CN2012200109941U CN201220010994U CN202502980U CN 202502980 U CN202502980 U CN 202502980U CN 2012200109941 U CN2012200109941 U CN 2012200109941U CN 201220010994 U CN201220010994 U CN 201220010994U CN 202502980 U CN202502980 U CN 202502980U
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Abstract
The utility model provides a bipolar time-of-flight mass analyzer. The time-of-flight mass analyzer comprises an ionization extraction area, a positive ion time-of-flight mass analyzer, and a negative ion time-of-flight mass analyzer. The time-of-flight mass analyzer is characterized in that the ionization extraction area is located between the positive ion time-of-flight mass analyzer and the negative ion time-of-flight mass analyzer, and the ionization extraction area, the positive ion time-of-flight mass analyzer and the negative ion time-of-flight mass analyzer are in a Z-shaped combination arrangement to form a reflection-type structure. According to the utility model, not only the effective flight length of ions is increased and analyzer performance is improved, but also a more compact and reasonable structure is realized and the space utilization is improved. Meanwhile, the electrostatic focusing lens technology is adopted to improve the transmission efficiency of the ions.
Description
Technical field
The utility model relates to a kind of analytical instrument detection technique, the reflective time of flight mass analyzer of particularly a kind of bipolarity.
Background technology
Time of flight mass analyzer (time-of-flight mass analyzer) principle is: under the vacuum environment; Obtain the different ions of identical acceleration energy; To have different flying speeds, then through after the certain-length field-free flight, ion will be able to separation detection according to the size of its mass-to-charge ratio.This mass separation technology resolution, highly sensitive; The no quality testing upper limit; Have microsecond level detection speed, and can in a sense cycle, accomplish full spectrum and detect, be widely used in fields such as chemical industry, the energy, medicine, material science, environmental science, life science.Can know that based on its principle and characteristics unipolar time of flight mass analyzer can only detect a kind of ion of polarity, detect simultaneously, just need two complete cover time of flight mass analyzers if realize the bipolarity ion.In the conventional orthoscopic bipolarity time of flight mass analyzer, because the design feature of orthoscopic, the negative ions analytical system can only be over against arrangement, and space availability ratio is not high; Simultaneously, for realizing high-resolution and high quality detection scope, need long ion aerial flight length; Though caused the bipolar time of flight mass analyzer of orthoscopic simple in structure; But performance is not high, and volume is big, Heavy Weight; Further influenced the configuration of vacuum system and electric system, made the design of vacuum and electric system, make, safeguard more complicated and increased instrument cost.
The utility model content
The purpose of the utility model provides the reflective time of flight mass analyzer of a kind of bipolarity, has improved the space availability ratio of analyzer, has dwindled the volume of analyzer.
For realizing above-mentioned purpose, the technical scheme that the utility model adopted is:
The reflective time of flight mass analyzer of a kind of bipolarity; Comprise: ionization draw-out area, cation time of flight mass analyzer, anion time of flight mass analyzer; Said ionization draw-out area is between cation time of flight mass analyzer and anion time of flight mass analyzer; Ionization draw-out area and cation time of flight mass analyzer, anion time of flight mass analyzer are " Z " type assembled arrangement, form reflective structure.
Said ionization draw-out area is positioned at whole device symmetrical centre, and cation and anion zone ionization simultaneously thus produce.Ionization mode in ionization draw-out area can be pulse type laser ionization, also can be other ionization mode such as electron bombardment ionization source etc.
Said cation time of flight mass analyzer is connected by cation accelerating region, cation condenser lens, cation echo area, cation drift region and cation detection zone and forms.
Said anion time of flight mass analyzer is connected by anion accelerating region, anion condenser lens, anion echo area, anion drift region and anion detection zone and forms.
Said cation condenser lens, anion condenser lens place respectively in cation drift region, the anion drift region, are used to regulate ion beam width.
Said cation echo area, anion echo area become greater than 0 ° respectively and place less than 45 ° angle with cation accelerating region, anion accelerating region, with the control ion flight passage, guarantee detection efficiency; Said cation echo area, anion echo area become 4.5 ° of angles with cation accelerating region, anion accelerating region respectively, and yawing moment is opposite, make ion become the about 9 ° of reflections of rightabout deflection.
Said cation detection zone and anion detection zone place respectively on the reflection path of positive and negative ion.
Said positive and negative ion accelerating region and echo area can be net arranged or do not have a net.
Said positive and negative ion condenser lens is conventional one dimension or two-dimensional electrostatic lens.
Said positive and negative ion condenser lens can be realized through on pole piece, applying the condenser lens electric field by cation accelerating region and anion accelerating region respectively.
Said positive and negative ion detection zone is the ion detector that conventional biplate microchannel plate is formed.
Said positive and negative ion detection zone becomes 5 degree angles to place respectively with the positive and negative ion accelerating region.
Said positive and negative ion time of flight mass analyzer applies opposite polarity voltage.
Said ionization draw-out area applies that voltage can direct current, also can be pulsed.
The operation principle of the utility model is: the negative ions that the ionization draw-out area produces under the effect of strong electrostatic field in draw-out area or impulse electric field, flies out respectively in the opposite direction; To the ion of arbitrary polarity wherein; Ion obtains identical kinetic energy behind accelerating region, then the ion of different mass-to-charge ratioes will have different flying speeds, and the ion flight speed that mass-to-charge ratio is little is fast; The ion flight speed that mass-to-charge ratio is big is slow; Through the field-free flight of certain distance, after the reflection of echo area, separate again by its mass-to-charge ratio size; The ion that final mass-to-charge ratio is little focuses on earlier and arrives detection zone and be able to detect, and focuses on behind the big ion of mass-to-charge ratio and arrives detection zone, is able to detect form the time of flight mass spectrum.
The principle of the utility model also is: the negative ions that instantaneous ionization generates is able to detect simultaneously, can obtain complete negative ions mass spectrum in the sense cycle.Can control ion beam width through electrostatic focusing lens, guarantee the efficiency of transmission of ion.Place angle through the accommodation reflex district and control ion flight passage, under the prerequisite of guaranteed performance, optimize whole analyzer structure.Realize the space-focusing of identical mass-to-charge ratio ion in the transmission course through regulating each acceleration and reflecting electrode voltage.
Compared with prior art, the utlity model has following beneficial effect: this structure can be carried out negative ions simultaneously and detect after ion is produced, and truly reflects sample composition information; The reflective structure that is adopted, and be the arrangement of " Z " font structure, not only increase the aerial flight length of ion, improved the analyzer performance, and made structure compact and reasonable more, significantly improve space availability ratio.Simultaneously, adopt the electrostatic focusing lens technology to improve the efficiency of transmission of ion.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Embodiment
Below in conjunction with embodiment and accompanying drawing the utility model is described in further detail, but the execution mode of the utility model is not limited thereto.
Fig. 1 is the structural representation of the utility model.Visible by Fig. 1, this device comprises ionization draw-out area and positive and negative ion time of flight mass analyzer three parts.
Described ionization draw-out area 2 is positioned at whole device symmetrical centre, and cation 6, anion 12 zone ionization simultaneously thus produce.
Described cation time of flight mass analyzer is made up of cation accelerating region 3, cation condenser lens 4, cation drift region 5, cation echo area 7, cation detection zone 1.
Described anion time of flight mass analyzer is made up of anion accelerating region 9, anion condenser lens 10, anion drift region 11, anion echo area 13, anion detection zone 8.
Described time of flight mass analyzer adopts reflective structure, and is " Z " type assembled arrangement; Cation condenser lens 4 places respectively in cation drift region 5 and the anion drift region 11 with anion condenser lens 10, is used to regulate ion beam width; Cation echo area 7 and anion echo area 13 and cation accelerating region 3 and 4.5 ° of angles of anion accelerating region 9 written treaties, yawing moment is opposite, makes ion become the about 9 ° of reflections of rightabout deflection; Cation detection zone 1 places respectively on the reflection path of positive and negative ion with anion detection zone 8.Cation detection zone 1 becomes 5 degree angles to place with the cation accelerating region, anion detection zone 8 becomes 5 degree angles to place with the anion accelerating region.
Described ionization draw-out area electric field is about 4 * 10
5V/m, positive and negative ion accelerating voltage be about-/+4000V, whole device places vacuum environment to be superior to 1 * 10
-4Pa.
The cation 6 that ionization draw-out area 2 generates passes cation condenser lens 4 and cation drift region 5 after cation accelerating region 3 quickens, be able to separation detection by cation echo area 7 deflecting reflections to cation detection zone 1 again.
The anion 12 that ionization draw-out area 2 generates passes anion condenser lens 10 and anion drift region 11 after anion accelerating region 9 quickens, be able to separation detection by anion echo area 13 deflecting reflections to anion detection zone 8 again.
The foregoing description is the utility model preferred implementation; But the execution mode of the utility model is not restricted to the described embodiments; Other any do not deviate from change, the modification done under spirit and the principle of the utility model, substitutes, combination, simplify; All should be the substitute mode of equivalence, be included within the protection range of the utility model.
Claims (9)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200109941U CN202502980U (en) | 2011-02-15 | 2012-01-11 | A Bipolar Reflective Time-of-Flight Mass Analyzer |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120038311.9 | 2011-02-15 | ||
| CN201120038311 | 2011-02-15 | ||
| CN2012200109941U CN202502980U (en) | 2011-02-15 | 2012-01-11 | A Bipolar Reflective Time-of-Flight Mass Analyzer |
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| Publication Number | Publication Date |
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| CN202502980U true CN202502980U (en) | 2012-10-24 |
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| CN2012200109941U Expired - Lifetime CN202502980U (en) | 2011-02-15 | 2012-01-11 | A Bipolar Reflective Time-of-Flight Mass Analyzer |
| CN2012100074129A Pending CN102568997A (en) | 2011-02-15 | 2012-01-11 | Bipolar reflection-type flight time mass analyzer |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012100074129A Pending CN102568997A (en) | 2011-02-15 | 2012-01-11 | Bipolar reflection-type flight time mass analyzer |
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| CN (2) | CN202502980U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102568997A (en) * | 2011-02-15 | 2012-07-11 | 上海大学 | Bipolar reflection-type flight time mass analyzer |
| WO2013104201A1 (en) * | 2012-01-11 | 2013-07-18 | 上海大学 | Bipolar reflective time-of-flight mass spectrometer |
| CN113745091A (en) * | 2021-09-15 | 2021-12-03 | 深圳泰莱生物科技有限公司 | Control system and method of mass spectrum device |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105428199B (en) * | 2015-12-28 | 2017-12-01 | 中国计量科学研究院 | Mass spectrometric analysis method and the mass spectrometer with atmospheric pressure interface |
| CN109887829A (en) * | 2017-12-06 | 2019-06-14 | 中国科学院大连化学物理研究所 | An ionization source device based on simultaneous detection of positive and negative ions of VUV lamp |
| CN114628227A (en) * | 2020-12-14 | 2022-06-14 | 中国科学院大连化学物理研究所 | Ionization source with positive and negative ion storage and switching functions |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7649170B2 (en) * | 2006-10-03 | 2010-01-19 | Academia Sinica | Dual-polarity mass spectrometer |
| US8626449B2 (en) * | 2006-10-17 | 2014-01-07 | The Regents Of The University Of California | Biological cell sorting and characterization using aerosol mass spectrometry |
| CN101170042B (en) * | 2007-12-03 | 2010-05-19 | 厦门大学 | Laser Sputtering Ionization Cold Focus Orthogonal Time-of-Flight Mass Spectrometer |
| CN101789355B (en) * | 2010-03-18 | 2012-05-09 | 广州禾信分析仪器有限公司 | Time-of-flight mass spectrometer with wide dynamic range, implementation method and application thereof |
| CN202502980U (en) * | 2011-02-15 | 2012-10-24 | 上海大学 | A Bipolar Reflective Time-of-Flight Mass Analyzer |
-
2012
- 2012-01-11 CN CN2012200109941U patent/CN202502980U/en not_active Expired - Lifetime
- 2012-01-11 CN CN2012100074129A patent/CN102568997A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102568997A (en) * | 2011-02-15 | 2012-07-11 | 上海大学 | Bipolar reflection-type flight time mass analyzer |
| WO2013104201A1 (en) * | 2012-01-11 | 2013-07-18 | 上海大学 | Bipolar reflective time-of-flight mass spectrometer |
| CN113745091A (en) * | 2021-09-15 | 2021-12-03 | 深圳泰莱生物科技有限公司 | Control system and method of mass spectrum device |
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| Publication number | Publication date |
|---|---|
| CN102568997A (en) | 2012-07-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 200444 Baoshan District Road, Shanghai, No. 99 Patentee after: Shanghai University Patentee after: Guangzhou Hexin Instruments Co., Ltd. Address before: 200444 Baoshan District Road, Shanghai, No. 99 Patentee before: Shanghai University Patentee before: Guangzhou Hexin Analytical Instrument Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121024 |