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Ion guiding apparatus

An ion guidance and ion technology, applied in the direction of measuring devices, particle separation tubes, sample introduction/extraction, etc., can solve the problems of complicated circuit connection, high power consumption, inconvenient processing, etc., and achieve simple electrode shape and device structure, reduce Interference, the effect of facilitating processing and assembly

Active Publication Date: 2017-02-01
SHIMADZU SEISAKUSHO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this patent does not propose the concept of generating an osmotic voltage gradient in the axial direction by applying a voltage gradient in a direction perpendicular to the axial direction to drive ion transport along the axial direction.
In addition, the limitation of this device is that it is extremely dependent on the plate electrodes, so the capacitance between the electrodes is relatively large, and there will be relatively large power consumption when using radio frequency power to confine ions
[0010] To sum up, the electrode structure and circuit connection of the existing ion guidance and compression technology are relatively complicated, and it is not easy to process

Method used

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Embodiment 1

[0090] like figure 1 Shown is a schematic structural view of the best embodiment of the ion guide device of the present invention. As shown in the figure, the ion guide device 10 includes two sets of plate electrodes 101 a and 101 b extending along the spatial axis 102 , a first power supply device and a second power supply device. The two groups of plate electrodes 101a and 101b are extended and arranged in a direction perpendicular to the space axis 102, and at least one surface of each electrode 103 in each group of plate electrodes is basically on the same space plane, and the two groups The space planes where the plate electrodes 101a and 101b are located are not the same space plane and are not parallel, that is, there is an angle other than 180 degrees between the two space planes, so that the cross-sectional area in the direction perpendicular to the space axis 102 gradually decreases ion transport channels. The ion inlet 104 of the ion transmission channel has a lar...

Embodiment 2

[0106] Figure 13 Shown is another embodiment of the ion guide device of the present invention, which is used to further enhance the effect of the axial osmotic potential gradient. In this configuration, a set of auxiliary electrodes 108 are placed on either side of the ion guide. The second power supply device applies a voltage signal to the auxiliary electrode. By applying a voltage on it to limit the movement of ions to both sides, and at the same time establish an axial osmotic potential gradient inside the ion channel to drive ion transport. It should be noted that, in this embodiment, the second power supply device optionally applies voltage signals to the two groups of electrodes. The advantage of this structure is that the auxiliary electrode has a larger coverage area, so a stronger potential gradient can penetrate into the ion guide from both sides, thereby reducing the residence time of ions. In addition, when the auxiliary electrode 108 is not parallel to the sp...

Embodiment 3

[0108] and figure 1 The difference between the two groups of electrodes shown in the horizontal parallel expansion arrangement is that, as Figure 15 As shown, another embodiment of the ion guide device of the present invention also includes a device with a non-parallel expansion arrangement structure in the lateral expansion direction. The electrode system of the ion guide device is not a parallel structure in the lateral direction, but gradually approaches the central axis from both sides starting from the ion entrance. The benefit of this embodiment is that a relatively small number of electrodes can be used while allowing for a large ion receiving area and a small and focused ion outlet. In addition, the middle two groups of electrodes can essentially form a quadrupole structure with a gradually decreasing field radius, so it can always maintain a better focusing effect of ions, especially in the area near the ion entrance, which can reduce ion loss to a certain extent ....

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Abstract

The invention provides an ion guiding apparatus. The ion guiding apparatus comprises two groups of electrodes, a first power supply apparatus and a second power supply apparatus which are arranged to extend along a certain space axis, wherein the two groups of electrodes are arranged to expand along a direction vertical to the space axis, at least one surface of each electrode in each group of electrodes is basically disposed in the same space surface, the space surfaces where the two groups of electrodes are disposed are not the same space surface and are not in parallel, and thus an ion transmission channel with a gradually decreasing cross section area in the direction vertical to the space axis is formed; the first power supply apparatus is used for applying radio frequency voltages on at least one part of the electrodes of the two groups of electrodes; and the second power supply apparatus is used for applying voltage signals on at least one part of the electrodes of the two groups of electrodes. The ion guiding apparatus is simple in structure, easy to process and assemble and easy to be expanded in function, and at the same time, can realize high-efficiency transmission and effective compression of ions.

Description

technical field [0001] The invention relates to an ion guiding device, in particular to an ion guiding device which adopts osmotic voltage to axially drive ions. Background technique [0002] As we all know, the ion guide device is an indispensable key component of the mass spectrometer, and its performance greatly restricts the performance of the entire mass spectrometer in many aspects such as sensitivity, mass range, and scanning speed. Judging from the various ion guide devices used in current mainstream commercial mass spectrometers, quadrupoles and multipoles (usually hexapoles or octopoles) are usually the most common structures. As an ion guide, the quadrupole has the advantage of better ion beam compression, which facilitates the efficient introduction of ions into the next-stage ion optics. However, quadrupoles have a smaller ion receiving area and lower ion transmission efficiency than multipoles. In addition, the operating pressure of quadrupole and multipole i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J49/04H01J49/02H01J49/26
CPCH01J49/066G01N27/623H01J49/40H01J49/4205
Inventor 程玉鹏张小强孙文剑
Owner SHIMADZU SEISAKUSHO LTD
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