Atmospheric pressure ion source interface and its realizing method and use

An atmospheric pressure ion source and atmospheric pressure technology, applied in the direction of material separation, particle separator tube parts, sample introduction/extraction, etc., can solve the problem of unsatisfactory separation cone transmission efficiency, reduce the impact of sensitivity, and make spectrum analysis easy , Improve the effect of transmission efficiency

Inactive Publication Date: 2007-01-24
GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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Problems solved by technology

However, the transmission efficiency of the separation cone is not ideal

Method used

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  • Atmospheric pressure ion source interface and its realizing method and use

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Embodiment

[0032] Such as figure 1 As shown, the atmospheric pressure ion source interface includes: capillary 1, capillary temperature sensor 2, capillary base 3, heater cover 4, capillary heater 5, ion focusing electrode 6, radio frequency quadrupole 7, radio frequency quadrupole base 8 , planar separation cone 9, primary vacuum cavity 10, interface flange 11, vacuum pump outlet 12 and secondary vacuum interface 13. The capillary 1 is fixed at the center of the heater sleeve 4, which is a cylindrical metal block. The capillary 1 and the heater jacket 4 are welded together on the capillary base 3 . The capillary heater 5 is a commercially available heating device. The capillary heater 5 is placed in the heater jacket 4 together with the capillary temperature sensor 2 and located on both sides of the capillary 1 respectively. The capillary heater 5 first heats the heater cover 4 , and the heater cover 4 evenly transfers heat to the whole capillary 1 . The radio frequency quadrupole 7 ...

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Abstract

This invention provides an interface of an air pressure ionic source set between an ionic source and a mass analyzer including a heated capillary, a capillary heater, a capillary temperature sensor, a RF multi-pole rod, a plane separation cone and a first level vacuum cavity and a method utilizing the interface including: ions generated by the air pressure ionic source enter into a heated capillary under the action of strong electric field and assistant gas flow and generate supersonic expansion at the outlet of the capillary so as to be led into a first level vacuum of a mass spectrometer to re-focus acted by the RF field of the RF multi-pole rod to be sent into a second level vacuum by the plane separation cone, which utilizes the ionic focusing action of the RF multi-pole rod to assemble ions led by the capillary to an ionic beam smaller than 0.5mm then induces it to a mass spectrometer having double desolvation action. This invention can integrate multiple kinds of atmosphere ionic sources with a mass analyzer to finish differential pumping.

Description

technical field [0001] The invention relates to an interface between an atmospheric pressure ion source and a mass spectrometer in mass spectrometry technology, in particular to an interface for introducing ions into a mass spectrometer under atmospheric pressure and its realization method and application. Background technique [0002] Mass spectrometry can determine the precise molecular weight and molecular structure of a substance. The main principle is to ionize the substance to be measured in an electromagnetic field, and then separate and detect these ions according to their mass-to-charge ratio. The instrument that implements mass spectrometry, that is, the mass spectrometer, is generally divided into several parts such as an ion source, a mass analyzer, and an ion detector. The mass analyzer works in high vacuum, and the ion source can be in vacuum, such as: electron bombardment source and laser ionization source, etc.; it can also be at low p...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J49/02H01J49/04G01N27/62G01N30/72G01N30/04
Inventor 周振黄正旭郭长娟
Owner GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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