CN109994366A - A kind of bending-type multistage bar ion focusing transmission part - Google Patents
A kind of bending-type multistage bar ion focusing transmission part Download PDFInfo
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- CN109994366A CN109994366A CN201910286638.9A CN201910286638A CN109994366A CN 109994366 A CN109994366 A CN 109994366A CN 201910286638 A CN201910286638 A CN 201910286638A CN 109994366 A CN109994366 A CN 109994366A
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- 238000005452 bending Methods 0.000 claims abstract description 49
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- 230000015572 biosynthetic process Effects 0.000 claims abstract description 5
- 230000005684 electric field Effects 0.000 claims description 14
- 239000011248 coating agent Substances 0.000 claims description 3
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- 239000002184 metal Substances 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J49/00—Particle spectrometers or separator tubes
- H01J49/02—Details
- H01J49/06—Electron- or ion-optical arrangements
- H01J49/062—Ion guides
- H01J49/063—Multipole ion guides, e.g. quadrupoles, hexapoles
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J49/00—Particle spectrometers or separator tubes
- H01J49/26—Mass spectrometers or separator tubes
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- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Abstract
The invention discloses a kind of bending-type multistage bar ion focusing transmission parts, bending-type conducting rod including more distributions in a center of symmetry and formation bending space structure, support base, bending-type conducting rod includes flat segments and bending section, flat segments are cylindrical structure or pyramidal structure, bending section is cylindrical structure or pyramidal structure, the top end face of flat segments is the bottom face of bending section, the top of bending section converges to be formed around central axes distributed architecture in a center of symmetry to central axes, and bending space structure forms the bending space structure that inlet calibre is big and exit caliber is small；The present invention can not only be such that the field strength of bending-type space structure further increases, and outlet size can be made to further decrease, which in turn enhances ion focusing performances, simultaneously as outlet size further decreases, the background of detection can also be further decreased, promote the overall sensitivity of detection, due to the presence of flat segments, the ion beam etc. that high speed can be made to enter can further be stablized, and preferably carry out the focusing of next step.
Description
Technical field
The present invention relates to ion focusing transmission fields, especially a kind of to be based on bending-type multistage bar ion focusing transport part
Part.
Background technique
Mass spectrograph is a kind of for detecting highly sensitive, the high-resolution instrument of substance chemical component, it is first by sample
Product are converted into gas ion, are then separated ion according to the size of mass-to-charge ratio (m/z) by electric field or magnetic field, then measure
The intensity of ion forms mass spectrogram out, qualitatively or quantitatively can obtain the chemical component of substance according to mass spectrogram.
It can be produced by any system in various ionizing systems for the analyte ions by mass-spectrometry analysis
It is raw.For example, AP-MALDI, APPI, ESI, APCI and ICP system can be used in mass spectrometry system and generate ion.This
Many (760Torr) under atmospheric or near atmospheric pressure in a little systems generate ion.After generating ion, analyte from
Son must be guided into or sample in mass spectrum.In general, mass spectrometric analyzer part is maintained at from 10-4Torr to 10-8Torr
High vacuum levels.In practice, to ion carry out sampling include by analyte ions in the form of the ion beam finely limited from
Ion source is transferred to high vacuum mass spectrograph room via one or more middle vacuum rooms.Before each of middle vacuum room is held at
Vacuum level between rear chamber.Therefore, wherein analyte ions form associated pressure water from ion in a stepped fashion
It is flat to be transitioned into mass spectrometric stress level.In most applications, it is expected that by ion not significant losses of ions state
Under be transmitted through each of various rooms of spectrometer system.Ion guidance is usually used to come so that ion edge in MS system
The direction that limits it is mobile.
Ion transmission product is six grades of bars of homogeneous diameter currently on the market, and entering of constituting of 6 six grades of bar inscribed circles
As mouthful diameter with outlet diameter is.After six grades of bars apply rf electric field and axial gradient electric field, ion convergent coke is at six grades
Inside bar, outlet then is entered from entrance, is ion and neutral gas one in the atmospheric pressure outside vacuum due to ion source
Rise and driven by vacuum and the pressure difference of atmospheric pressure, entered by the narrower bore of a very little, borehole enlargement, can enter vacuum from
The total amount of son amount and neutral gas will increase, but be needed the vacuum pump of bigger pumping speed, could maintain separation, detection ion must
The base vacuum of palpus.And correspondingly, the inscribed circle of six grades of bars needs bigger, can just make most of ion, anxious after small holes
After speed expansion, into six grades of bars, by the constraint of AC field, it is then focused into.But six grades of bar inscribe garden circular diameters are big
After, the focusing effect in exit is deteriorated, and will lead to after more ions have gone out six grades of bars, diverging has lost, it is difficult under entrance
In grade ion optical path, it is therefore desirable to which the measured ion to be checked of more quantity can be obtained in inlet and go out by finding one kind
Mouthful better focused ion of place's acquisition, at the same also available better detection background to obtain more highly sensitive mode and side
Method.
Summary of the invention
In view of this, needing to overcome at least one of drawbacks described above in the prior art, the present invention provides a kind of foldings
Curved multistage bar ion focusing transmission part, including more bending-type conducting rods, support base, the more bending-type conducting rods enclose
Around central axes distribution in a center of symmetry and the internal bending space structure with open chamber of formation, shown bending-type conducting rod
Including flat segments and bending section, shown flat segments be cylindrical structure or pyramidal structure, shown bending section be cylindrical structure or
Pyramidal structure, the top end faces of the flat segments are the bottom face of the bending section, and the top of the bending section is to the central axes
Convergence, which is formed, surrounds central axes distributed architecture in a center of symmetry, and the bending space structure forms inlet calibre greatly and exports
The small bending space structure of bore；The support base includes fixing piece, the first conductive plate and the second conductive plate, and described first
Conductive plate and second conductive plate are fixedly mounted on the fixing piece, the more bending-type conducting rod fixed connections
On the inside of the hollow hole of the fixing piece, first conductive plate and second conductive plate are coupled external power supply, described
Bending-type conducting rod and first conductive plate and second conductive plate form the open chamber internal high frequency electricity
The successively connection of field and axial gradient electric field.
According to the bore phase described in the prior art, exported due to ion beam entrance and ion beam in this patent background technique
Together, lead to not meet simultaneously and reach the cost that can not go to increase integral device with lower cost or simple method and answer
Miscellaneous degree, while the problem of focusing capability can be promoted again；And bending-type multistage bar ion focusing transmission part disclosed by the invention, lead to
It crosses using the bending-type multistage bar ion focusing transmission part that there is ion beam inlet calibre to be greater than ion beam exit caliber, it can be with
So that mechanism makes simple and convenient, while certain cost can also be reduced, can more improve ion focusing ability, be promoted final
Detection sensitivity, simultaneously because the bending-type member structure used, since ion stream and neutral gas under the effect of the pressure can
High speed, which enters, to be focused in transmission part, and the energy that will cause needs is bigger, while airflow stability is insufficient, to final detection according to
Certain influence can be so brought, therefore the flat segments of front end can play the role of further steady air flow, the bending section of rear end
Due to using the structure that gradually reduces of bore, the increase of the field strength of inner space can be caused, gradually enhance inner space from
Sub- focusing capability, while outlet size can be further reduced, so that final detection result is more accurate, and use size gradually
Scaled-down version structure can bring preferably final testing result than can more reduce exit caliber using size uniformity structure
Effect, wherein cylindrical structure described in this case and conical structure should also include cross section and the consistent knot of size
The structure that structure and cross section and size are gradually reduced should not be limited to the specific word face meaning of this case institute.
Ion source is in the atmospheric pressure outside vacuum, and ion and neutral gas are together by the pressure difference of vacuum and atmospheric pressure
Driving, enters cone space structure by the narrower bore of a very little at a high speed, and taper bar body applies rf electric field and axial gradient
After electric field, ion convergent coke enters outlet inside multistage bar, from entrance, and on the one hand multistage bar inlet calibre is big, can make
More ions into multistage bar, by the constraint of AC field, are then focused into after small holes rapid expansion；Another party
Face can not only be such that the field strength of bending-type space structure further increases due to the bending space structure and bending-type rod piece of use,
And outlet size can be made to further decrease, which in turn enhances ion focusing performances, simultaneously as outlet size is further
Reduce, the background of detection can also be further decreased, promote the overall sensitivity of detection, simultaneously because the presence of flat segments, it can
So that the ion beam etc. that high speed enters can further be stablized, the focusing of next step is preferably carried out.
In addition, a kind of disclosed bending-type multistage bar ion focusing transmission part also has additional skill as follows according to the present invention
Art feature:
Further, the bending-type conducting rod be bending-type metal rod or the external bending-type rod piece with conductive coating or
There is the bending-type rod piece of conductive component inside person.
Further, the bending-type conduction rod piece 4 or 6 or 8.
Further, the end face that the bending-type conducting rod is located at the inlet has around the central axes center pair
The first end face of distribution, the inclined-plane and the end face is claimed to form the lesser second end of opposed facets close to central axes side
Face.
Further, the bending-type conducting rod is an integral molding structure.
Further, shown flat segments are cylindrical structure or pyramidal structure, and shown bending section is cylindrical structure or cone
Shape structure, the bending-type conducting rod are the independent assortment of above structure.
Further, the taper that the bending section is formed is less than or equal to 30 degree and is greater than 0 degree.
The additional aspect of the present invention and advantage will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect of the invention and advantage will become from the following description of the accompanying drawings of embodiments
Obviously and it is readily appreciated that, in which:
Fig. 1 is the structural schematic diagram of the embodiment of the present invention.
Fig. 2 is bending-type conducting rod structural schematic diagram in Fig. 1.
Fig. 3 is Fig. 2 partial enlargement diagram.
Wherein, 1 bending-type space structure, 2 bending-type conducting rods, 21 flat segments, 22 bending sections, 3 support bases (fixing piece),
32 first conductive plates, 33 second conductive plates, 11 entrances, 12 outlets, 211 first end faces, 212 second end faces.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions；Below with reference to attached
The embodiment of figure description is exemplary, and for explaining only the invention, and is not construed as limiting the claims.
In the description of the present invention, it is to be understood that, term " on ", "lower", "bottom", "top", "front", "rear",
The orientation or positional relationship of the instructions such as "inner", "outside", " cross ", " perpendicular " is to be based on the orientation or positional relationship shown in the drawings, and is only
For the convenience of describing the present invention and simplifying the description, rather than the device or element of indication or suggestion meaning must have specific side
Position is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " connection " " connects
It is logical ", " connected ", " connection ", " cooperation " shall be understood in a broad sense, for example, it may be being fixedly connected, be integrally connected, be also possible to
It is detachably connected；It can be the connection inside two elements；It can be directly connected, the indirect phase of intermediary can also be passed through
Even；" cooperation " can be the cooperation in face and face, be also possible to the cooperation a little with face or line and face, also include the cooperation of hole axle, right
For those skilled in the art, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
Inventive concept of the invention is as follows, a kind of bending-type multistage bar ion focusing transmission part is provided, by using tool
There is ion beam inlet calibre to be greater than the bending-type multistage bar ion focusing transmission part of ion beam exit caliber, mechanism can be made
Simple and convenient is made, while certain cost can also be reduced, ion focusing ability can be more improved, it is sensitive to promote final detection
Degree, simultaneously because the bending-type member structure used, since ion stream and neutral gas can enter at a high speed under the effect of the pressure
It focuses in transmission part, the energy that will cause needs is bigger, while airflow stability is insufficient, can still bring to final detection
Certain influence, therefore the flat segments of front end can play the role of further steady air flow, the bending section of rear end is due to using
The structure that bore gradually reduces, can cause the increase of the field strength of inner space, gradually enhance inner space ion focusing energy
Power, while outlet size can be further reduced, so that final detection result is more accurate, and use size gradually scaled-down version knot
Structure can more reduce exit caliber than use size uniformity structure, bring better effect to final testing result,
In, cylindrical structure described in this case and conical structure should also include cross section and the consistent structure of size and cross
The structure that section and size are gradually reduced should not be limited to the specific word face meaning of this case institute.
As shown, according to an embodiment of the invention, a kind of bending-type multistage bar ion focusing transmission part, including
More bending-type conducting rods, support base, the more bending-type conducting rods are in central axes distribution in a center of symmetry and formation
Portion has the bending space structure of open chamber, and shown bending-type conducting rod includes flat segments and bending section, shown flat segments
For cylindrical structure or pyramidal structure, shown bending section is cylindrical structure or pyramidal structure, and the top end face of the flat segments is
It converges to be formed around the central axes into center pair to the central axes in the top of the bottom face of the bending section, the bending section
Claim distributed architecture, the bending space structure forms the bending space structure that inlet calibre is big and exit caliber is small；The support
Seat includes fixing piece, the first conductive plate and the second conductive plate, and first conductive plate and second conductive plate are solid
Dingan County is on the fixing piece, and the more bending-type conducting rod fixed connections are on the inside of the hollow hole of the fixing piece, institute
It states the first conductive plate and second conductive plate is coupled external power supply, the bending-type conducting rod and first conductive electrode
Plate and second conductive plate form the successively connection of the open chamber internal high frequency electric field and axial gradient electric field.
In addition, a kind of disclosed also having for bending-type multistage bar ion focusing transmission part is added as follows according to the present invention
Technical characteristic:
According to some embodiments of the present invention, the bending-type conducting rod is that bending-type metal rod or outside have conductive coating
Bending-type rod piece or the internal bending-type rod piece with conductive component.
According to some embodiments of the present invention, the bending-type conduction rod piece 4 or 6 or 8.
According to some embodiments of the present invention, the end face that the bending-type conducting rod is located at the inlet has around institute
It states the first end face of central axes central symmetry distribution, the inclined-plane and the end face and is forming opposed facets close to central axes side
Lesser second end face.
According to an embodiment of the invention, the bending-type conducting rod is an integral molding structure.
According to some embodiments of the present invention, shown flat segments are cylindrical structure or pyramidal structure, and shown bending section is
Cylindrical structure or pyramidal structure, the bending-type conducting rod are the independent assortment of above structure.
According to one embodiment of present invention, the flat segments are cylindrical type, and the bending section is cylindrical type, straight at this time
Space electric field in section is uniform, and bending section space electric field can gradually becoming smaller and enhance due to space bore, but the outlet
Bore can not further reduce because cylinder type end side is uniform, i.e., caliber size will receive limitation.
According to one embodiment of present invention, the flat segments are cylindrical type, and the bending section is pyramid type, straight at this time
Space electric field in section is uniform, and bending section space electric field can gradually becoming smaller and enhance due to space bore, simultaneously because circle
Itself cross sectional dimensions of tapered rod piece is also reducing, and will also result in the enhancing of corresponding field strength, meanwhile, the exit caliber can be with
Further reduce, theoretically can be infinitely small, this can greatly improve the environment in exit, specific number can by test into
Row determines.
According to one embodiment of present invention, the flat segments are pyramid type, and the bending section is cylindrical type, this embodiment
In, the flat segments conical structure variation then needs gently, and in favor of entering the stabilization of air-flow at a high speed, bending section then can be according to reality
Border needs to be adjusted, and major function is for ion focusing.
According to one embodiment of present invention, the flat segments are pyramid type, and the bending section is pyramid type, this embodiment
In, flat segments conical structure variation then need it is gentle, in favor of entering the stabilization of air-flow at a high speed, flat segments itself taper and
Flat segments angle, is determined according to actual needs, and bending section can then be adjusted according to actual needs, in the present embodiment, institute
The bore for stating outlet theoretically can also be infinitely small, and major function is for ion focusing.
According to an embodiment of the invention, the taper that the bending section is formed is less than or equal to 30 degree and is greater than 0 degree.
It is any to refer to that " one embodiment ", " embodiment ", " illustrative examples " etc. mean to combine embodiment description
Specific component, structure or feature are included at least one embodiment of the present invention；This specification everywhere this schematically
Statement is not necessarily referring to identical embodiment；Moreover, when combining any embodiment to describe specific component, structure or feature
When, advocated, component, structure or feature in conjunction with as the realization of other embodiments all fall within those skilled in the art
Within the scope of.
Although having carried out detailed retouch to a specific embodiment of the invention referring to multiple illustrative examples of the invention
It states, it must be understood that those skilled in the art can be designed that various other improvement and embodiment, these improve and implement
Example will be fallen within spirit and scope；Specifically, in aforementioned disclosure, attached drawing and the scope of the claims
Within, reasonable variations and modifications can be made in terms of the arrangement that components and/or sub-combination are laid out, without departing from
Spirit of the invention；In addition to components and/or the variations and modifications of layout aspect, range is by appended claims and its is equal
Object limits.
Claims (7)
1. a kind of bending-type multistage bar ion focusing transmission part, including more bending-type conducting rods, support base, the more foldings
Curved conducting rod is shown around central axes distribution in a center of symmetry and the internal bending space structure with open chamber of formation
Bending-type conducting rod includes flat segments and bending section, and shown flat segments are cylindrical structure or pyramidal structure, and shown bending section is
Cylindrical structure or pyramidal structure, the top end face of the flat segments are the bottom face of the bending section, the top of the bending section
It converges to be formed around central axes distributed architecture in a center of symmetry to the central axes, the bending space structure forms entrance
The bending space structure that bore is big and exit caliber is small；The support base includes that fixing piece, the first conductive plate and second are conductive
Pole plate, first conductive plate and second conductive plate are fixedly mounted on the fixing piece, the more bending-types
On the inside of the hollow hole of the fixing piece, first conductive plate and second conductive plate are coupled conducting rod fixed connection
External power supply, the bending-type conducting rod and first conductive plate and second conductive plate form the open chamber
The successively connection of chamber interior high-frequency electric field and axial gradient electric field.
2. a kind of bending-type multistage bar ion focusing transmission part according to claim 1, which is characterized in that the bending
Type conducting rod is bending-type metal rod or the external bending-type rod piece or internal with conductive component with conductive coating
Bending-type rod piece.
3. a kind of bending-type multistage bar ion focusing transmission part according to claim 1, which is characterized in that the bending
Type conduction rod piece 4 or 6 or 8.
4. a kind of bending-type multistage bar ion focusing transmission part according to claim 1, which is characterized in that the bending
The end face that type conducting rod is located at the inlet has the first end face around central axes central symmetry distribution, the inclined-plane
The lesser second end face of opposed facets is being formed close to central axes side with the end face.
5. according to a kind of bending-type multistage bar ion focusing transmission part described in claim 1, which is characterized in that the bending-type
Conducting rod is an integral molding structure.
6. according to a kind of bending-type multistage bar ion focusing transmission part described in claim 1, which is characterized in that shown flat segments
For cylindrical structure or pyramidal structure, shown bending section is cylindrical structure or pyramidal structure, and the bending-type conducting rod is upper
State the independent assortment of structure.
7. according to a kind of bending-type multistage bar ion focusing transmission part described in claim 1, which is characterized in that the bending section
The taper of formation is less than or equal to 30 degree and is greater than 0 degree.
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| CN201910286638.9A CN109994366A (en) | 2019-04-10 | 2019-04-10 | A kind of bending-type multistage bar ion focusing transmission part |
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| CN201910286638.9A CN109994366A (en) | 2019-04-10 | 2019-04-10 | A kind of bending-type multistage bar ion focusing transmission part |
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2019
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|---|---|---|---|---|
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| CN107004566A (en) * | 2014-11-28 | 2017-08-01 | Dh科技发展私人贸易有限公司 | RF ion guides |
| CN105931944A (en) * | 2016-05-18 | 2016-09-07 | 中山大学 | Ion transmission system |
| CN209843658U (en) * | 2019-04-10 | 2019-12-24 | 江苏天瑞仪器股份有限公司 | Bending type multi-stage rod ion focusing transmission component |
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