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Dual-polarity mass spectrometer

一种双极离子、飞行时间质谱的技术，应用在双极性质谱仪领域，能够解决遗漏离子型态及含量、不能同时侦测两种离子、无法捕捉样品信息等问题

Inactive Publication Date: 2009-09-02
ACAD SINICA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, conventional unipolar mass spectrometers can only measure positive or negative ions individually at the same time, but cannot detect both ions at the same time
Such a detection method will not be able to capture the information of all samples, and may even miss some information such as the type and content of ions

Method used

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Examples

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no. 1 example

[0058] The experiments performed using the bipolar time-of-flight mass spectrometer 100 of the embodiment of the present invention will be described below with reference to related figures. In this experiment, the ion source electrode 130 and the extraction electrodes 126a, 126b, 128a, and 128b were each 40 mm wide and 100 mm long, and were 6 mm apart from each other. The ion source electrode 130 was 6 mm thick, and the extraction electrodes 126a, 126b, 128a and 128b are each 3 millimeters thick; In addition, the rectangular slits 154a and 154b are each 26 millimeters long and 3 millimeters wide, and are connected with the sample plate front end 131 (such as image 3 ) are 18 mm apart; the diameter of the circular openings 156a, 156b, 158a and 158b is 5 mm; the centers of the openings 156a and 156b are both in the +z direction and 1.5 mm from the x-axis, and the centers of the openings 158a and 158b are in the +z direction 2.5 mm from the x-axis.

[0059] Continuing from the ...

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Abstract

A dual-polarity mass spectrometer includes an ion source, a negative ion mass analyzer, and a positive ion mass analyzer to measure both the negative and positive ion spectra of a sample material simultaneously. The ion source includes a sample surface on which the sample material is positioned, the sample material providing positive ions and negative ions when excited by a laser beam or an energetic particle stream. A first extraction electrode is connected to a voltage higher than the sample surface to attract the negative ions from the sample electrode. A second extraction electrode is connected to a voltage lower than the sample surface to attract the positive ions from the sample electrode. The negative and positive ions are analyzed simultaneously by the negative ion mass analyzer and the positive ion mass analyzer, respectively.

Description

technical field [0001] The invention relates to a bipolar mass spectrometer. Background technique [0002] Mass spectrometers are commonly used to identify the chemical composition and amount that make up solid, gaseous, or liquid samples. In general, a mass spectrometer can separate and analyze ions using their charge-to-mass ratio. For example, a conventional time-of-flight mass spectrometer includes an accelerating region with electrodes that generate an electric field to accelerate positive ions (cations) or negative ions (anions) and direct the ions toward one end of the flight tube. At this point, heavier ions travel at a lower speed, while smaller ions travel at a higher speed. A detector at the other end of the flight tube detects the ions, so the mass spectrometer can calculate the charge-to-mass ratio based on the time it takes for each ion to travel the length of the flight tube. [0003] In general, both positively and negatively charged particles can be conve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J49/40H01J49/10
CPCH01J49/0095H01J49/40
Inventor 王亦生陈仲瑄蔡尚庭陈邱文
Owner ACAD SINICA
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