Multiple functions ion mobility spectrometer device

Patent metadata

Field	Value
Publication number	US-11022581-B2
Application number	US-201916727612-A
Country	US
Kind code	B2
Filing date	Dec 26, 2019
Priority date	Dec 29, 2018
Publication date	Jun 1, 2021
Grant date	Jun 1, 2021

Abstract

Embodiments of the present disclosure provide an ion mobility spectrometer device. The ion mobility spectrometer device includes: an ion mobility tube, a sampling device, and a sampling and circulating gas path. The sampling device includes a solid sample desorption device and a gas sampling device. The solid sample desorption device is configured to process the solid sample into a first mixed gas containing the solid sample, and the gas sampling device is configured to process the gas sample into a second mixed gas containing the gas sample. The sampling and circulating gas path is configured to transfer the first mixed gas and/or the second mixed gas into the ion mobility tube for detection.

First claim

The invention claimed is:

1. An ion mobility spectrometer device comprising:
an ion mobility tube configured to detect a sample;
a sampling device configured to sample the sample and output a mixed gas containing the sample; and
a sampling and circulating gas path configured to be able to connect the sampling device with the ion mobility tube, so that the mixed gas containing the sample outputted by the sampling device is introduced into the ion mobility tube for detection, and at least part of a gas discharged by the ion mobility tube is returned to at least a part of the sampling device and/or the ion mobility tube;
wherein the sampling device includes a solid sample desorption device and a gas sampling device, the solid sample desorption device being configured to process the solid sample into a first mixed gas containing the solid sample, the gas sampling device being configured to process the gas sample into a second mixed gas containing the gas sample;
the sampling and circulating gas path is configured so that the first mixed gas and/or the second mixed gas can be transferred to the ion mobility tube for detection,
wherein the ion mobility tube comprises a first ion mobility tube inlet and a second ion mobility tube inlet;
the sampling and circulating gas path is configured to be able to transfer the first mixed gas into the ion mobility tube through the first ion mobility tube inlet for detection; and the second mixed gas of the gas sampling device into the ion mobility tube through the second ion mobility tube inlet for detection.

2. The ion mobility spectrometer device according to claim 1 , wherein the sampling and circulating gas path comprises an outer circulation sub gas path and an inner circulation sub gas path, and the outer circulation sub gas path is configured to filter the gas discharged by the ion mobility tube and transfer a part of the filtered gas to the sampling device, and then via the first ion mobility tube inlet and/or the second ion mobility tube inlet, back to the ion mobility tube, and
the inner circulation sub gas path is configured to transfer another part of the filtered gas to the ion mobility tube, wherein the ion mobility tube includes a first circulation inlet and/or a second circulation inlet, and the another part of the filtered gas is transferred to the ion mobility tube through the first circulation inlet and/or the second circulation inlet.

3. The ion mobility spectrometer device according to claim 2 , wherein the outer circulation sub gas path and the inner circulation sub gas path have a common gas path part, the common gas path part including a pump, configured to, in the sampling and circulating gas path, drive the gas out of the ion mobility tube and flow in the sampling and circulating gas path.

4. The ion mobility spectrometer device according to claim 3 , wherein the common gas path part includes a first buffer tank having a certain gas volume, and the first buffer tank is arranged in the sampling and circulating gas path, located between the ion mobility tube and the pump, and configured to communicate with the ion mobility tube so as to receive the gas discharged from the ion mobility tube.

5. The ion mobility spectrometer device according to claim 4 , wherein the common gas path part further comprises a second buffer tank having a certain gas volume, configured to receive the gas discharged from the pump.

6. The ion mobility spectrometer device according to claim 5 , wherein the common gas path part further includes a circulation filter for filtering/purifying gas, which is provided between the pump and the second buffer tank and configured to receive the gas discharged from the pump.

7. The ion mobility spectrometer device according to claim 6 , wherein the common gas path part further comprises a gas replenishing/discharging gas path arranged in the sampling and circulating gas path to communicate with the pump through a three-way valve so that a part of the gas from the pump can be discharged by the gas replenishing/discharging gas path out of the ion mobility spectrometer device, and an external gas can be introduced by the gas replenishing/discharging gas path into the circulation filter in the sampling and circulating gas path through the three-way valve.

8. The ion mobility spectrometer device according to claim 6 , wherein the ion mobility tube further comprises a first outlet and/or a second outlet configured to discharge gas in the ion mobility tube and be in fluid communication with the first buffer tank; and
the common gas path part of the inner circulation sub gas path is configured such that the gas discharged from the first outlet and/or the second outlet of the ion mobility tube passes through at least the first buffer tank, the filter, the pump and the second buffer tank in sequence, and the inner circulation sub gas path is further configured to transfer a part of the gas from the second buffer tank, via the first circulation inlet and/or the second circulation inlet of the ion mobility tube, to the ion mobility tube.

9. The ion mobility spectrometer device according to claim 5 , wherein the sampling and circulating gas path further comprises a conduit connection connected to the second buffer tank so that a part of the gas discharged from the second buffer tank enters the conduit connection, and at least a part of the gas passing through the conduit connection enters the outer circulation sub gas path and can be transferred to the solid sample desorption device and/or the gas sampling device.

10. The ion mobility spectrometer device according to claim 9 , wherein the conduit connection is a four way junction, and a part of the gas passing through the four way junction is able to be transferred into a calibration gas path when a calibration gas path valve is turned on, the calibration gas path is configured to perform a trace calibration agent addition process on the gas from the four way junction to obtain a calibration gas;
the calibration gas path is configured to be able to be in fluid communication with the outer circulation sub gas path, so that a gas flow path from the gas sampling device to the ion mobility tube is disconnected during calibration, and the calibration gas is transferred to the ion mobility tube;
wherein the calibration gas path includes a calibration part configured to provide a trace calibration agent to be mixed with the purified gas from the second buffer tank to form the calibration gas.

11. The ion mobility spectrometer device according to claim 9 , wherein the outer circulation sub gas path comprises a first outer circulation sub gas path part and a second outer circulation sub gas path part, and the first outer circulation sub gas path part includes a sampling tube located between the solid sample desorption device and the gas sampling device.

12. The ion mobility spectrometer device according to claim 11 , wherein:
a part of the gas passing through the conduit connection enters the first outer circulation sub gas path part and is transferred to the sampling tube; the other part of the gas passing through the conduit connection enters the second outer circulation sub gas path part and is transferred to the solid sample desorption device.

13. The ion mobility spectrometer device according to claim 11 , wherein:
the gas sampling device is connected to the first outer circulation sub gas path part through a first two-position three-way valve, by which the first outer circulation sub gas path part is controlled to be in a state that it is in disconnection to the gas sampling device and the gas is allowed be circulated in the first outer circulation sub gas pa

Assignees

• Nuctech Co Ltd
• Univ Tsinghua

Inventors

• Zhang Qingjun
• Li Yuanjing
• Chen Zhiqiang
• Li Jianmin
• Liu Yaohong
• Zhu Weiping
• Ma Qiufeng
• Cao Biao
• Li Ge
• Wang Wei
• Yan Lili
• Li Guangqin

Classifications

• G01N27/622 Primary

  Ion mobility spectrometry · CPC title

• H01J49/0459

  for solid samples · CPC title

• H01J49/0422

  for gaseous samples (interfaces to gas chromatographs G01N30/7206) · CPC title