CN101118833A - Four prismoids shaped four-grade mass spectrometer - Google Patents
Four prismoids shaped four-grade mass spectrometer Download PDFInfo
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- CN101118833A CN101118833A CNA2007101443990A CN200710144399A CN101118833A CN 101118833 A CN101118833 A CN 101118833A CN A2007101443990 A CNA2007101443990 A CN A2007101443990A CN 200710144399 A CN200710144399 A CN 200710144399A CN 101118833 A CN101118833 A CN 101118833A
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Abstract
The present invention provides a square-shaped stage four-grade mass spectrograph comprising four electrodes that enclose a space area. The four electrodes are trapezoid plane electrodes which enclose a square-shaped stage taking the folding of a sloped line of the trapezoid plane electrodes in pairs. The square-shaped stage four-grade mass spectrograph provided by the present invention has the characteristics of simple structure and low production difficulty, thereby effectively reducing the production and the using cost of the four-grade mass spectrograph and enabling the four-grade mass spectrograph to be more widely applied.
Description
(1) technical field
What the present invention relates to is a kind of detecting instrument, specifically a kind of with come the analytical instrument of go-on-go or detection by the characteristics such as mass-to-charge ratio of ion.
(2) background technology
Mass spectrometer is a kind of solid that can be used for accurately analyzing, the scientific instrument of various chemical compositions and content thereof in the liquids and gases sample.In mass spectrometer, quadrupole mass spectrometer is one of mass spectrometer of at present extensive use.It has simple in structure, and volume is less, characteristics such as uses and easy to operate.
Traditional quadrupole mass spectrometer is made of four hyperboloid shape electrodes or cylindrical electrode, and Fig. 1 is the principle schematic of traditional quadrupole mass spectrometer, wherein electrode 11,12,13 and 14 by certain way be fixed together form, form the quadrupole rod electrode system.In actual use, with two electrode of opposite, for example 11 and 13; 12 and 14 link together, and form two end points 15 and 16, add on each end points that then amplitude equates, opposite polarity radio-frequency power supply.As shown in Equation 1:
Ф
1(t)＝+(U+Vcosωt)
Ф
2(t)＝-(U+Vcosωt)
To represent dc voltage value, V to represent ac voltage, ω=2 π f be that angular frequency, the f of radio-frequency power supply is the frequency values of radio-frequency power supply to U in the following formula.
Above-mentioned quadrupole rod system in by four zones that electrode surrounded, produces based on quadrupole field under the effect of radio-frequency power supply, and contains the Electric Field Distribution of certain DC electric field composition.
When the ion of different mass-to-charge ratioes during, under above-mentioned effect of electric field, have different movement locus by four central areas that electrode surrounded.What have can and be detected by follow-up ion detector by this zone, and what have will bump with electrode stem and disappear.In actual applications, by changing the AC and DC magnitude of voltage that is added on the quadrupole rod electrode regularly, allow the ion of different mass-to-charge ratioes be detected one by one by the quadrupole rod electrode system successively, write down and print resulting ion signal, be needed mass spectral analysis figure.
Traditional four-electrode spectrum theory thinks that four electric fields that bar electrode produced should be as far as possible near pure quadrupole field.Otherwise can destroy the mass resolution ability of four-electrode spectrum.Theoretically, this just requires the machining of four bar type electrodes and assembling all to have very high precision.Therefore, the production and processing difficulty of quadrupole mass spectrometer greatly increases, and its cost is also very expensive.
(3) summary of the invention
The purpose of this practicality invention is to provide a kind of easy manufacturing, production and the low four prismoids shaped four-grade mass spectrometer of use cost.
The object of the present invention is achieved like this: it comprises four electrodes, four electrodes are encircled into an area of space, described four electrodes are ladder plane electrodes, and four ladder plane electrodes are encircled into a truncated rectangular pyramids type area of space so that a trapezoidal hypotenuse is adjacent in twos.
The present invention can also comprise some architectural features like this:
1, described electrode is a planar electrode;
2, the geometry of described four electrodes is identical, and the cross section that four electrodes are encircled into an area of space is the rectangle cross section;
3, the geometry of two of described four electrodes electrode of opposite is identical, and the geometry of two adjacent electrodes is inequality, and the cross section that four electrodes are encircled into an area of space is the rectangle cross section.
The present invention so that a hypotenuse with trapezoidal is adjacent in twos, forms four water chestnut bench-type mass of ion analyzer, i.e. mass spectrometers by four ladder plane electrodes at last.When this four water chestnuts bench-type mass of ion analyzer work, its opposed two electrodes link together, and form two outputs.Load equal, the opposite polarity radio-frequency power supply of one group of one amplitude on two outputs respectively, form is as follows:
Ф
1(t)＝+(U+Vcosωt)
Ф
2(t)＝-(U+Vcosωt)
In the following formula: U represents dc voltage value, and V represents ac voltage, and ω=2 π f are the angular frequency of radio-frequency power supply, and f is the frequency values of radio-frequency power supply.
Under the effect of this radio-frequency power supply, will form Electric Field Distribution based on quadripolar electric field in the central area of four water chestnut bench-types, promptly produce the applied electric field of four-electrode spectrum.When doing the mass of ion analysis with this four water chestnuts bench-type mass of ion analyzer, can be by the AC and DC voltage composition in the method scanning radio-frequency power supply that configures in advance, therefore in the central area, form the Electric Field Distribution that to become, when ion passes through this electric field region, under certain Electric Field Distribution situation, the ion that has can be stablized and pass through, and other ions then can't pass through this zone owing to instability.Note the ion signal that passes through and the relation of radio-frequency voltage, be needed mass spectrogram.
The present invention has provided the method that four comparatively simple ladder plane electrodes of a kind of usefulness are formed four-electrode spectrum, and it can obviously reduce the manufacture difficulty of mass spectrometer, reduces and produces and use cost, makes the four-electrode spectrum instrument obtain to use widely.
(4) description of drawings
The quadrupole rod mass spectrometer system schematic diagram that Fig. 1 is made up of four bar type electrodes.
Fig. 2 is a four prismoids shaped four-grade mass spectrometer schematic diagram of the present invention.
Fig. 3 is a truncated rectangular pyramids shape quality analysis system elementary diagram of the present invention.
Fig. 4 is the four prismoids shaped four-grade mass spectrometer system schematic.
(5) embodiment
For example the present invention is done description in more detail below in conjunction with accompanying drawing:
In conjunction with Fig. 2, the composition of four prismoids shaped four-grade mass spectrometer comprises 21,22,23 and 24 4 electrodes of electrode, four electrodes are encircled into an area of space 25, four electrodes are ladder plane electrodes, and four ladder plane electrodes are encircled into a truncated rectangular pyramids type area of space so that a trapezoidal hypotenuse is adjacent in twos.Electrode is a planar electrode.The geometry of four electrodes is identical, and the cross section that four electrodes are encircled into an area of space is the rectangle cross section.
The geometry of four electrodes also can be incomplete same, and promptly the geometry of two of four electrodes electrode of opposite is identical, and the geometry of two adjacent electrodes is inequality, and the cross section that four electrodes are encircled into an area of space is the rectangle cross section.
Having square sectional is with another difference with the truncated rectangular pyramids type mass analyzer in rectangle cross section, because the difference of electrode shape, cause the Electric Field Distribution in truncated rectangular pyramids type mass analyzer central area also inequality, therefore, the performance with truncated rectangular pyramids type mass analyzer of different geometries also is not quite similar.
Fig. 3 is basic principle figure of the present invention.Wherein up and down two ladder type electrodes 21 and 23 are joined together to form an output 26, about two trapezoidal electrodes 22 and 24 be joined together to form another output 27.Load radio-frequency power supply on two outputs 26 and 27 respectively with following likeness in form:
Ф
1(t)＝+(U+Vcosωt)
Ф
2(t)＝-(U+Vcosωt)
Under the effect of this power supply, can produce the Electric Field Distribution that to use as ion analysis four four water chestnut bench-type central areas that trapezoidal electrode surrounded.Promptly form four water chestnut bench-type mass of ion analyzers, or be referred to as four water chestnut bench-type mass spectrometers.
Fig. 4 is an application example of the present invention.It is made up of each several parts such as ion source 41, ion-optic system 42, truncated rectangular pyramids type mass analyzer 43 and ion detectors 44.The ion flow that is produced by ion source 41 enters into ion-optic system 42 through electrode 46.The effect of ion-optic system is the direction of motion to ion, and kinergety is regulated, and ion beam is focused on etc.With the efficiency of transmission that improves ion flow be the ion flow of follow-up truncated rectangular pyramids type mass analyzer raising appropriate motion state.After the ion after the ion-optic system effect is by electrode 47, enter truncated rectangular pyramids type mass analyzer 43.In truncated rectangular pyramids type mass analyzer, ion is owing to the electric field action that is subjected to based on quadripolar electric field, they will be owing to the difference of mass-to-charge ratio the central area by truncated rectangular pyramids type mass analyzer successively, and finally the electrode 38 by postposition arrives ion detectors 44 and is detected.The ion-conductance signal of ion detector output is needed mass-spectrometer measurement result through record after the processing, or mass spectrogram.
Generally speaking, ion-optic system, mass of ion analyzer and ion detector all must be worked under the vacuum condition again.Ion source is also inequality according to the different desired vacuum condition of its kind.The ion source that has requires to be operated under the vacuum condition, as electron impact ionization ion source etc.The ion source that has also can be operated under the atmospheric pressure, as electron spray ionisation ion source etc.
Claims (4)
1. four prismoids shaped four-grade mass spectrometer, it comprises four electrodes, four electrodes are encircled into an area of space, it is characterized in that: described four electrodes are ladder plane electrodes, and four ladder plane electrodes are encircled into a truncated rectangular pyramids type area of space so that a trapezoidal hypotenuse is adjacent in twos.
2. four prismoids shaped four-grade mass spectrometer according to claim 1 is characterized in that: described electrode is a planar electrode.
3. four prismoids shaped four-grade mass spectrometer according to claim 1 and 2 is characterized in that: the geometry of described four electrodes is identical, and the cross section that four electrodes are encircled into an area of space is the rectangle cross section.
4. four prismoids shaped four-grade mass spectrometer according to claim 1 and 2, it is characterized in that: the geometry of two electrode of opposite of described four electrodes is identical, the geometry of two adjacent electrodes is inequality, and the cross section that four electrodes are encircled into an area of space is the rectangle cross section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710144399A CN100585788C (en) | 2007-09-29 | 2007-09-29 | Four prismoids shaped four-grade mass spectrometer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710144399A CN100585788C (en) | 2007-09-29 | 2007-09-29 | Four prismoids shaped four-grade mass spectrometer |
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| CN101118833A true CN101118833A (en) | 2008-02-06 |
| CN100585788C CN100585788C (en) | 2010-01-27 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103151236A (en) * | 2012-12-29 | 2013-06-12 | 聚光科技(杭州)股份有限公司 | Ion collision reaction tank and ion transmission method |
| CN103165395A (en) * | 2011-12-19 | 2013-06-19 | 中国科学院大连化学物理研究所 | Device for adjusting movement section of ion beam |
| CN103954699A (en) * | 2014-04-01 | 2014-07-30 | 聚光科技(杭州)股份有限公司 | Detection device for gas chromatograph-mass spectrometer |
| CN104347342A (en) * | 2013-08-01 | 2015-02-11 | 北京普析通用仪器有限责任公司 | Ion guiding device for mass spectrometer, and collision reaction tank |
-
2007
- 2007-09-29 CN CN200710144399A patent/CN100585788C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103165395A (en) * | 2011-12-19 | 2013-06-19 | 中国科学院大连化学物理研究所 | Device for adjusting movement section of ion beam |
| CN103165395B (en) * | 2011-12-19 | 2015-08-05 | 中国科学院大连化学物理研究所 | A kind of adjusting device of movement section of ion beam |
| CN103151236A (en) * | 2012-12-29 | 2013-06-12 | 聚光科技(杭州)股份有限公司 | Ion collision reaction tank and ion transmission method |
| CN104347342A (en) * | 2013-08-01 | 2015-02-11 | 北京普析通用仪器有限责任公司 | Ion guiding device for mass spectrometer, and collision reaction tank |
| CN103954699A (en) * | 2014-04-01 | 2014-07-30 | 聚光科技(杭州)股份有限公司 | Detection device for gas chromatograph-mass spectrometer |
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| Publication number | Publication date |
|---|---|
| CN100585788C (en) | 2010-01-27 |
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