Gas chromatograph-mass spectrometer with double ion sources

Abstract

The invention provides a gas chromatograph-mass spectrometer with double ion sources. The gas chromatograph-mass spectrometer comprises a mass spectrometer, a liquid chromatograph module, a gas chromatograph module, a first channel, a second channel, an ion deflection lens and a second ion focusing lens, wherein the liquid chromatograph module is sequentially connected with an atmospheric pressure ion source, a vacuum interface and a first ion focusing lens; the gas chromatograph module is connected with a vacuum ionization source; the ion deflection lens is provided with a first entrance, a second entrance and an exit; the first entrance and the second entrance both deflect for 90 degrees from the exit; the first entrance is connected with the first ion focusing lens; the second entrance is connected with the vacuum ionization source; the exit is connected with the second ion focusing lens; and the second ion focusing lens is arranged between the ion deflection lens and the mass spectrometer. According to the gas chromatograph-mass spectrometer provided by the invention, the double ion sources are connected with the mass spectrometer at the same time and the double ion sources can be analyzed simultaneously.

Description

technical field [0001] The invention relates to a chromatography-mass coupling, in particular to a dual-ion source chromatography-mass coupling instrument. Background technique [0002] Triple quadrupole mass spectrometers are generally used in conjunction with liquid chromatography or gas chromatography. When used in conjunction with liquid chromatography, atmospheric pressure ion sources (such as ESI) are often used. When connected with gas chromatography, vacuum ionization sources (such as EI) are generally used. During the experiment, the atmospheric pressure ionization source and the vacuum ionization source cannot be used at the same time. It is necessary to replace the chromatic interface after unloading the vacuum to use another ionization source. [0003] It can be seen that when using chromatographic mass spectrometry, it is necessary to replace the corresponding chromatographic interface to meet the use requirements of the atmospheric pressure ion source and vacuu...

AI Technical Summary

Problems solved by technology

[0003] It can be seen that when using chromatographic mass spectrometry, it is necessary to replace the corresponding chromatographic interface to meet the use requirements of the atmospheric pressure ion source and vacuum ionization source. During the replacement process, the vacuum needs to be unloaded. For a long time, the function of connecting liquid chromatography and gas chromatography at the same time cannot be realized

Images