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Atmospheric pressure ion source interface and its realizing method and use

An atmospheric pressure ion source, atmospheric pressure technology, applied in material separation, parts of particle separator tubes, sample introduction/extraction, etc., can solve problems such as unsatisfactory transmission efficiency of separation cones, reduce the impact of sensitivity, and easily resolve spectra. , the effect of improving transmission efficiency

Inactive Publication Date: 2010-05-12
GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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
  • 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, aRF 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 tore-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 ionicsources 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 pressure, such as glow di...

Claims

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Application Information

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Patent Type & Authority Patents(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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