Mass spectrometry systems that improve ion detection efficiency

Abstract

The invention discloses a mass spectrometry system capable of improving ion detection efficiency. The mass spectrometry system capable of improving ion detection efficiency comprises a linear ion trapand an ion detector, wherein the linear ion trap is composed of two pairs of columnar electrodes which are arranged in parallel, namely a pair of X electrodes and a pair of Y electrodes, and a pair of end cover thin sheet electrodes, namely a pair of Z electrodes, and an ion leading-out groove is formed in the center of at least one pair of the columnar electrodes; and radio frequency voltages ofdifferent proportions are configured to one pair of electrodes, namely X electrodes, in the ion emitting direction of the linear ion trap. The mass spectrometry system has the beneficial effects thatthe ion detection efficiency is improved in a multiplied mode by only changing the configuration mode of the radio frequency voltages of the linear ion trap, and the structure of the linear ion trapdoes not need to be changed; and the system can ensure that 80% or above of ion detection efficiency is guaranteed, and the equivalent mass resolution ratio under the configuration of the original symmetric radio-frequency voltage can be maintained.

Description

technical field [0001] The invention relates to the technical field of mass spectrometers, in particular to a mass spectrometer system capable of improving ion detection efficiency. Background technique [0002] Mass spectrometry plays a pivotal role in the field of modern analysis, and has been widely extended to many fields such as environmental protection, food safety, life science and space exploration. As a modern analytical instrument, mass spectrometer has high detection sensitivity and can effectively detect trace substances. It is a good qualitative and quantitative analysis tool. [0003] The mass analyzer is the core component of the mass spectrometer. According to the different mass analyzers, the mass spectrometer can be divided into magnetic mass spectrometer, Fourier transform-ion cyclotron resonance mass spectrometer, ion trap mass spectrometer, quadrupole mass spectrometer and time-of-flight mass spectrometer. mass spectrometer. Among them, the ion trap ma...

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Problems solved by technology

However, this structure will greatly increase the volume, power consumption, detection circuit and manufacturing cost of the mass spectrometer and is not conducive to the miniaturization of the mass spectrometer.

Therefore, in all the linear ion trap mass spectrometers with simplified structures that have been reported, only one electron multiplier is used for ion detection. The theoretical maximum ion detection efficiency of this detection method is only 50%, and the actual ion detection efficiency is higher than less than the value

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