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Ionic mobility spectrometer semipermeable membrane pre-enrichment sample injection method and apparatus thereof

An ion mobility and sampling device technology is applied in the field of ion mobility spectrometer semipermeable membrane pre-concentration sampling method and device, which can solve the problems of lowering the detection lower limit of ion mobility spectrometer and low semipermeable membrane efficiency.

Active Publication Date: 2015-03-04
INST OF ELECTRONICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a kind of ion mobility spectrometer semi-permeable membrane pre-enrichment sampling method and device, to solve the problem of low efficiency of ion mobility spectrometer semi-permeable membrane sampling method in the prior art, can effectively Improve injection efficiency and lower the detection limit of ion mobility spectrometers

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  • Ionic mobility spectrometer semipermeable membrane pre-enrichment sample injection method and apparatus thereof
  • Ionic mobility spectrometer semipermeable membrane pre-enrichment sample injection method and apparatus thereof
  • Ionic mobility spectrometer semipermeable membrane pre-enrichment sample injection method and apparatus thereof

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Embodiment 1

[0042] Such as figure 2 Shown: a semi-permeable membrane pre-enrichment sampling device for ion mobility spectrometer, characterized in that: the semi-permeable membrane pre-enrichment sampling device includes a sampling port 11, a sampling pump air port 12, an air circuit board 13. Semipermeable membrane 21, semipermeable membrane temperature control device 22, carrier gas inlet 31, sampling device and ion mobility spectrometer interface 32.

[0043] During the sampling process, the semi-permeable membrane is at room temperature, and under the action of the sampling pump, the sample gas flows through the sampling port 11 to the gas circuit panel 13, passes through the surface of the semi-permeable membrane 21, and then is discharged through the suction port 12 of the sampling pump. There are many concentric circular gas channels on the side of the gas circuit board in contact with the semi-permeable membrane, which ensures full contact between the sample gas and the surface ...

Embodiment 2

[0050] Such as Figure 4 Shown: a semi-permeable membrane pre-concentration sampling device for ion mobility spectrometer, characterized in that: the pre-concentration membrane sampling device includes a sampling port 11, a sampling pump suction port 12, an air circuit board 13, Semi-permeable membrane 21 , carrier gas inlet 31 , sampling device and ion mobility spectrometer interface 32 . Among them, the semipermeable membrane 21 has a self-heating function and has heating and temperature measuring electrodes, which can realize rapid temperature rise of the semipermeable membrane 21 .

[0051] During the sampling process, the semi-permeable membrane is at room temperature, and under the action of the sampling pump, the sample gas flows through the sampling port 11 to the gas circuit panel 13, passes through the surface of the semi-permeable membrane 21, and then is discharged through the suction port 12 of the sampling pump. There are many concentric circular gas channels on...

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Abstract

The present invention discloses an ionic mobility spectrometer semipermeable membrane pre-enrichment sample injection method and an apparatus thereof, and relates to an ionic mobility spectrometer technology. The apparatus comprises a sampling part, a semipermeable membrane sample injection part and a desorption part, wherein the semipermeable membrane sample injection part comprises a semipermeable membrane and a semipermeable membrane temperature control device. According to the present invention, during an ionic mobility spectrometer semipermeable membrane pre-enrichment sample injection process, the semipermeable membrane is at a room temperature during sampling, such that analytes can be easily enriched in the semipermeable membrane; the semipermeable membrane temperature control device is adopted to heat the semipermeable membrane to a temperature of 80-300 DEG C during desorption, such that the enriched analytes can be easily subjected to thermal desorption and effectively permeate through the semipermeable membrane so as to enter an ionic mobility spectrometer drift tube; and with the apparatus and the method, a detection lower limitation of the ionic mobility spectrometer can be effectively reduced.

Description

technical field [0001] The invention relates to the technical field of ion mobility spectrometers, and relates to a semipermeable membrane pre-enrichment sampling method and device for ion mobility spectrometers. Background technique [0002] Ion mobility spectrometry is a method of detecting substances by using the difference in mobility of gas-phase ions in a weak electric field. Its principle is similar to that of time-of-flight mass spectrometry. The main difference is that the separation of ions in ion mobility spectrometry is at or near atmospheric pressure. environment. Ion mobility spectrometer (IMS: Ion mobility spectrometer) is mainly composed of a drift tube and peripheral gas system and circuit system. The drift tube includes an ionization zone, an ion gate, an ion drift zone, and a Faraday disk. When the ion mobility spectrometer is used for detection, the detected substance enters the ionization area of ​​the drift tube, forms charged ions under the action of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/62G01N1/24G01N1/44G01N27/622
Inventor 高晓光贾建李建平何秀丽
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI