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A way of applying auxiliary regulation voltage ac

A technology for adjusting voltage and auxiliary signals, applied to circuits, discharge tubes, electrical components, etc., to improve analysis performance and efficiency

Active Publication Date: 2021-05-07
SHANGHAI YUDA IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

No research has yet proved whether the application of auxiliary AC signals in other stages of the mass analysis process except the scanning phase can improve and optimize the mass analysis performance of the linear ion trap

Method used

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  • A way of applying auxiliary regulation voltage ac
  • A way of applying auxiliary regulation voltage ac
  • A way of applying auxiliary regulation voltage ac

Examples

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Effect test

Embodiment 1

[0024] A method of applying auxiliary regulation voltage AC, the specific method is as follows figure 2 shown. 201 is a linear ion trap with a semicircular arc electrode, 202 and 203 are secondary coils, 204 is an excitation signal AC1, 205 is an auxiliary signal AC2, and 206 is a radio frequency power supply. In this embodiment, the excitation signal AC2 is coupled to the negative end of the radio frequency power supply through the secondary coil 202, and applied to the electrode in the x direction; the auxiliary signal AC2 is coupled to the positive end of the radio frequency RF through the secondary coil 203, and applied on the electrodes in the y direction. During the mass analysis process, the excitation signal AC1 works only in the ion collision-induced dissociation stage or the scanning stage, and the auxiliary signal AC2 only works in the ion collision-induced dissociation stage or the ion cooling stage. The voltage signals of AC1 and AC2 are as follows: image 3 As...

Embodiment 2

[0026] A method of applying auxiliary regulation voltage AC, the specific method is as follows Figure 4 shown. Among them, 401 is a semicircular electrode linear ion trap, 402 is a radio frequency power supply RF, 403, 404, 407, 408 are secondary coils, 405 is an excitation signal AC1, 406 is an auxiliary signal AC2, 409 and 410 are corresponding inductance matching grounding end. In this embodiment, the excitation signals AC1 and AC2 are coupled to the negative end of the radio frequency power supply through the secondary coils 403 and 404 respectively, and applied to the electrodes in the x direction. Since the electrodes in the x direction are coupled with two AC signals, two inductance matching ground terminals need to be coupled to the corresponding electrodes in the y direction to ensure that the radio frequency RF signals on the electrodes in the x direction and the electrodes in the y direction are balanced. The difference between this example and Implementation 1 i...

Embodiment 3

[0028] A method of applying auxiliary regulation voltage AC, the specific method is as follows Figure 5 shown. Among them, 501 is a semicircular electrode linear ion trap, 502 is a radio frequency power supply RF, 503, 504, 507, and 508 are secondary coils, 505 is an excitation signal AC1, 506 is an auxiliary signal AC2, 509 is an auxiliary signal AC3, and 510 is a corresponding The inductance is matched to ground. The difference between this example and the above-mentioned embodiments is that two-way auxiliary signals AC2 and AC3 are applied. The excitation signal AC1 and the auxiliary signal AC2 are respectively coupled to the negative end of the radio frequency RF through the secondary coils 503 and 504, and applied to the electrodes in the x direction; the auxiliary signal AC3 is coupled to the positive end of the radio frequency RF through the secondary coil 507, and at the same time 510 The inductance is matched to the ground terminal to ensure that the radio frequenc...

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Abstract

The invention discloses an application method of an auxiliary regulating voltage AC, in which an auxiliary AC signal AC2 is added to the traditional linear ion trap electric signal application method; the waveform of the auxiliary signal AC2 is a sine wave or a square wave with a certain frequency, and its amplitude is value; the time period during which the auxiliary signal AC2 is applied is set as an ion cooling phase or an ion collision-induced dissociation phase. It can be realized in the following three ways: 1) Apply auxiliary signal AC2 on the electrode in the direction of non-ion emission; 2) Apply auxiliary signal AC2 on the electrode in the direction of ion emission; 3) Apply on the four electrodes of the ion trap Dual auxiliary signals AC2 and AC3. The method of the invention can effectively improve the ion cooling effect and the ion collision-induced dissociation efficiency, thereby improving the analysis performance of the linear ion trap.

Description

technical field [0001] The invention relates to the technical field of mass analyzers, in particular to an application method of an auxiliary regulating voltage AC. Background technique [0002] Mass spectrometry is a method for qualitative and quantitative analysis of substances by separating ions according to their mass-to-charge ratios through an electric field or a magnetic field. Instruments that use mass spectrometry for analysis are collectively referred to as mass spectrometers. Mass spectrometer is a representative of modern high-end analytical instruments. Due to its strong qualitative and quantitative capabilities, high sensitivity and detection limit, it is an effective tool for trace detection of low-level substances. At present, mass spectrometers have been widely used in food safety, life sciences, medical testing, environmental monitoring, public safety, aerospace and other fields. More and more national standards, industry standards and analytical testing m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J37/248
CPCH01J37/248
Inventor 肖育姚如娇姜健顾义畅丁正知朱勇勇
Owner SHANGHAI YUDA IND
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