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Thermal desorption membrane inlet high field asymmetry waveform ion migration spectrometer

A waveform ion migration, high-field asymmetric technology, applied in mass spectrometers, instruments, scientific instruments, etc., can solve the problems of large volume, long sample analysis time, and affecting detection sensitivity

Inactive Publication Date: 2014-06-11
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many types of thermal desorption sampling devices on the market today, but these sampling devices are large in size and take a long time for sample analysis, resulting in low injection volume and affecting the final detection sensitivity.

Method used

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  • Thermal desorption membrane inlet high field asymmetry waveform ion migration spectrometer
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Experimental program
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Embodiment Construction

[0022] The invention provides a high-field asymmetric waveform ion mobility spectrometer with thermal analysis membrane sampling.

[0023] The membrane sampling device is a box with one end open and the other closed. The open end of the box is provided with a semi-permeable membrane. The box is equipped with an air inlet and an air outlet. Reaction area; the semi-permeable membrane separates the inner chamber of the box from the ionization reaction area of ​​the ion mobility spectrometer, so that they are not connected to each other; the reaction ions generated under the action of the ionization source sweep the membrane surface exposed to the ionization reaction area, so that Sample molecules are ionized on the membrane surface.

[0024] A heating wire is placed on one side of the inner chamber of the semi-permeable membrane, and the heating is carried out by continuous heating or intermittent heating.

[0025] A heating lamp is placed in the vertical direction of the ioniza...

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Abstract

The invention designs a thermal desorption membrane inlet high field asymmetry waveform ion migration spectrometer which comprises a membrane inlet device, a membrane heating component, an ionization source, an ionization reaction zone, an ion migration zone, a guard electrode zone, and an ion detection zone. The technical scheme of the membrane heating comprises continuousness heating, intermittence heating and instant heating. Heating wire is adopted for the continuousness heating and the intermittence heating, and the instant heating is achieved by the adoption of the high temperature heating lamp. A sample takes the form of molecules and penetrates a semipermeable membrane which is heated through the three heating types including the continuousness heating, the intermittence heating and the instant heating, so that transmittance and penetration speed of the membrane inlet device to the sample can be improved effectively, and detection sensitivity of the spectrometer is improved.

Description

technical field [0001] The invention relates to a thermal analysis membrane sampling high-field asymmetric waveform ion mobility spectrometer, which can effectively improve the transmittance and transmission speed of the membrane sampling device to samples and the response speed and sensitivity of the instrument. Background technique [0002] High-field asymmetric waveform ionmobility spectrometry (FAIMS) uses the difference in ion mobility between high and low fields to separate ions. The sample is carried by the carrier gas into the ionization area, and then the ionized sample ions enter the migration area. The migration zone is generally two parallel flat plates or a coaxial cylindrical structure. A radio frequency electric field with an asymmetric waveform is applied to one of the plates, and the other is grounded. In the migration area, the ions will vibrate up and down in the direction perpendicular to the direction of the carrier gas under the action of the high-fre...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J49/26H01J49/04G01N27/64
Inventor 李杨李海洋赵琨仓怀文陈文东
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI