CN112129790A - Nano-particle filtering and trapping device - Google Patents

Nano-particle filtering and trapping device Download PDF

Info

Publication number
CN112129790A
CN112129790A CN202011121879.7A CN202011121879A CN112129790A CN 112129790 A CN112129790 A CN 112129790A CN 202011121879 A CN202011121879 A CN 202011121879A CN 112129790 A CN112129790 A CN 112129790A
Authority
CN
China
Prior art keywords
tem
device body
filter membrane
grid
trapping device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202011121879.7A
Other languages
Chinese (zh)
Inventor
张必敏
王学求
李瑞红
师淑娟
韩志轩
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hebei Geophysical Exploration Academy
Institute of Geophysical and Geochemical Exploration of CAGS
Original Assignee
Hebei Geophysical Exploration Academy
Institute of Geophysical and Geochemical Exploration of CAGS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hebei Geophysical Exploration Academy, Institute of Geophysical and Geochemical Exploration of CAGS filed Critical Hebei Geophysical Exploration Academy
Priority to CN202011121879.7A priority Critical patent/CN112129790A/en
Publication of CN112129790A publication Critical patent/CN112129790A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
    • G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
    • G01N23/04—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/34—Purifying; Cleaning
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
    • G01N23/20—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by using diffraction of the radiation by the materials, e.g. for investigating crystal structure; by using scattering of the radiation by the materials, e.g. for investigating non-crystalline materials; by using reflection of the radiation by the materials
    • G01N23/20008—Constructional details of analysers, e.g. characterised by X-ray source, detector or optical system; Accessories therefor; Preparing specimens therefor
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
    • G01N23/20—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by using diffraction of the radiation by the materials, e.g. for investigating crystal structure; by using scattering of the radiation by the materials, e.g. for investigating non-crystalline materials; by using reflection of the radiation by the materials
    • G01N23/20008—Constructional details of analysers, e.g. characterised by X-ray source, detector or optical system; Accessories therefor; Preparing specimens therefor
    • G01N23/20025—Sample holders or supports therefor
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
    • G01N23/20—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by using diffraction of the radiation by the materials, e.g. for investigating crystal structure; by using scattering of the radiation by the materials, e.g. for investigating non-crystalline materials; by using reflection of the radiation by the materials
    • G01N23/20008—Constructional details of analysers, e.g. characterised by X-ray source, detector or optical system; Accessories therefor; Preparing specimens therefor
    • G01N23/2005—Preparation of powder samples therefor
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2223/00—Investigating materials by wave or particle radiation
    • G01N2223/03—Investigating materials by wave or particle radiation by transmission
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2223/00—Investigating materials by wave or particle radiation
    • G01N2223/05—Investigating materials by wave or particle radiation by diffraction, scatter or reflection
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2223/00—Investigating materials by wave or particle radiation
    • G01N2223/10—Different kinds of radiation or particles
    • G01N2223/102—Different kinds of radiation or particles beta or electrons
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2223/00—Investigating materials by wave or particle radiation
    • G01N2223/30—Accessories, mechanical or electrical features
    • G01N2223/312—Accessories, mechanical or electrical features powder preparation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2223/00—Investigating materials by wave or particle radiation
    • G01N2223/60—Specific applications or type of materials
    • G01N2223/616—Specific applications or type of materials earth materials

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Molecular Biology (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

The invention relates to the technical field of nano geochemistry, in particular to a filtering and trapping device for nano particles, which comprises: the device comprises a sealing cover, a trapping device body, a TEM carrier net and a microporous filter membrane, wherein the sealing cover is provided with an inlet; the collecting device body is detachably connected with the sealing cover, and an outlet is formed in the collecting device body; the TEM grid is fixed in the trapping device body through a fixing component; the microporous filter membrane is arranged in the trapping device body and is arranged between the inlet and the TEM carrier net. In the scheme, the fixing component is adopted to fix the TEM grid, so that the installation of the TEM grid is facilitated, and the problems of electrostatic jump and easy displacement of the TEM grid are solved. The trapping device body is connected with the sealing cover, and the microporous filter membrane and the TEM carrier net can effectively complete the separation and trapping processes in the whole closed device, so that the loss of the particles such as tube wall adsorption in the long-distance migration can be avoided, and the sample pollution can be avoided.

Description

Nano-particle filtering and trapping device
Technical Field
The invention relates to the technical field of nano geochemistry, in particular to a filtering and trapping device for nano particles.
Background
One of the tasks of nano-geochemistry is to research the distribution, combination characteristics, migration rules and the like of metal nano particles in the earth, and utilize a physicochemical method to enrich and extract nano particles and analyze the content of elements to reflect and detect deep metal deposits. Numerous studies have shown that the nano-metallic particles in surface soils and soil gases are closely related to deep metal minerals. Therefore, the theoretical research significance and the practical application value of the nano geochemical research transferred into the soil and the soil gas for mineral exploration are developed. How to effectively capture and separate nano particles from surface soil and soil gas and place effective samples on a grid for TEM (English name: Transmission Electron Microscope, Chinese name: Transmission Electron Microscope) observation is a precondition and technical difficulty for developing nano geochemical research.
In the development process of a method for filtering and trapping nanoparticles in collected soil and soil gas, the existing method is to filter soil particles smaller than 1 micron by using a filter cylinder, then trap the nanoparticles by using a trapping cylinder, place a TEM grid in the trapping device between two screens, and fix the screens clamping the TEM grid in the cylinder.
The existing method has three big problems, the first problem is that the TEM grid is very thin and very small, and is very easy to generate static electricity, the TEM grid is very easy to adsorb and jump when the TEM grid is placed on two screens by using tweezers, and the TEM grid has a front surface and a back surface, so that the operation difficulty is greatly increased; the second problem is that because a plurality of TEM grid meshes are only clamped between two screen meshes and are not absolutely fixed, the TEM grid meshes easily run to the edges of the screen meshes in the fixing process of the screen meshes, or a plurality of TEM grid meshes are overlapped, so that the placing failure is caused, and the TEM grid meshes need to be operated again or damaged; a third problem is that the separation of the filter cartridge and the capture cartridge increases the loss of tube wall adsorption and the chance of sample contamination. The above problems greatly affect the experimental efficiency.
Disclosure of Invention
One of the technical problems to be solved by the invention is as follows: the problems that a TEM carrier net is easy to adsorb, jump and fail to install, and a sample is easy to damage and pollute exist in the existing nano particle filtering and trapping method.
(II) technical scheme
In order to solve the above technical problems, the present invention provides a filtering and trapping device for nanoparticles, comprising:
the sealing cover is provided with an inlet;
the collecting device body is detachably connected with the sealing cover, and an outlet is formed in the collecting device body;
the TEM grid is fixed in the trapping device body through a fixing component;
a microporous filter membrane disposed within the trapping device body, and the microporous filter membrane is disposed between the inlet and the TEM carrier web.
According to one embodiment of the invention, the fixing assembly comprises:
the screen carrying table is provided with a groove, and the TEM screen is arranged in the groove;
the pressing sheet is fixed on the mesh carrying table, and the TEM mesh is positioned between the groove and the pressing sheet.
According to one embodiment of the invention, the number of the TEM grids is multiple, the grid stage is provided with a plurality of grooves, and the number of the grooves is consistent with the number of the TEM grids.
According to one embodiment of the invention, the pressing sheet is provided with a through hole matched with the groove, and the diameter of the through hole is smaller than that of the groove.
According to one embodiment of the invention, the filtering and trapping device further comprises a double-layer silica gel sleeve, the double-layer silica gel sleeve is arranged on the pressing sheet, and the microporous filter membrane is arranged on the double-layer silica gel sleeve.
According to one embodiment of the invention, a placing table protruding inwards is arranged in the trapping device body, and the net carrying table is arranged on the placing table.
According to one embodiment of the invention, the TEM carrier mesh is an interference fit between the grooves and the preforms.
According to one embodiment of the invention, the sealing cover is provided with a connecting part, the connecting part is provided with an external thread, and the trapping device body is provided with an internal thread matched with the external thread.
According to one embodiment of the invention, the diameter of the microporous filter membrane is larger than the diameter of the TEM grid.
According to one embodiment of the invention, the pore size of the microfiltration membrane is not greater than 1 micron.
The invention has the beneficial effects that: in the filtering and capturing device for the nanoparticles, the fixing component is adopted to fix the TEM grid, so that the TEM grid is convenient to install, and the problems of electrostatic jump and easy displacement of the TEM grid are solved. The trapping device body is connected with the sealing cover, and the microporous filter membrane and the TEM carrier net can effectively complete the separation and trapping processes in the whole closed device, so that the loss of the particles such as tube wall adsorption in the long-distance migration can be avoided, and the sample pollution can also be avoided.
Drawings
The advantages of the above and/or additional aspects of the present invention will become apparent and readily appreciated from the following description of the embodiments taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic structural diagram of a nanoparticle filter trap provided herein;
fig. 2 is a schematic structural diagram of a screen supporting stage in the nanoparticle filter trapping device provided in the present application.
The reference numbers are as follows: 1. the device comprises a trapping device body, 2, a sealing cover, 3, a net carrying table, 4, a TEM net carrying table, 5, a pressing sheet, 6, screws, 7, a double-layer silica gel sleeve, 8 and a microporous filter membrane.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
As shown in figures 1 and 2, the invention provides a filtering and trapping device for nanometer particles, which comprises a sealing cover 2, a trapping device body 1, a TEM carrier net 4 and a microporous filter membrane 8, wherein the sealing cover 2 is provided with an inlet; the collecting device body 1 is detachably connected with the sealing cover 2, and an outlet is formed in the collecting device body 1; the TEM grid 4 is fixed in the trapping device body 1 through a fixing component; the microporous filter membrane 8 is arranged in the trapping device body 1, and the microporous filter membrane 8 is arranged between the inlet and the TEM carrier net 4.
Specifically, soil and soil gas nanoparticles are utilized to pass through the microporous filter membrane 8, and the micropores on the microporous filter membrane 8 can prevent larger particles in the soil and soil gas from passing through the microporous filter membrane 8. The micro-particles dispersed in the soil or soil gas are intercepted in a grading way, so that only the micro-particles smaller than the set micro-pores can reach the TEM grid 4.
The TEM grid 4 is fixed by the fixing component, so that the installation of the TEM grid 4 is facilitated, and the problems of electrostatic jump and easy displacement of the TEM grid 4 are solved. The trapping device body 1 is connected with the sealing cover 2, the microporous filter membrane 8 and the TEM carrier net 4 can effectively complete the separation and trapping processes in the whole closed device, the loss of the particles such as tube wall adsorption in the long-distance migration can be avoided, and the sample pollution can be avoided.
According to one embodiment of the invention, a fixation assembly comprises: the screen carrying table 3 is provided with a groove, and the TEM screen carrying 4 is arranged in the groove;
and the pressing sheet 5 is fixed on the mesh carrying table 3, and the TEM mesh carrying 4 is positioned between the groove and the pressing sheet 5.
Specifically, a pressing sheet 5 is arranged on the TEM grid 4, the pressing sheet 5 is fixed on the grid carrying table 3, and the grid carrying table 3 and the pressing sheet 5 can fix the TEM grid 4, so that the problems of electrostatic jumping and easy displacement of the TEM grid 4 are solved.
According to one embodiment of the invention, the number of the TEM grid 4 is multiple, and the grid stage 3 is provided with a plurality of grooves, and the number of the grooves is consistent with that of the TEM grid 4.
In particular, the provision of a plurality of TEM grids 4 enables an increase in the trapping efficiency, the same number of grooves being provided on the grid table 3 depending on the number of TEM grids 4 to be placed.
According to one embodiment of the invention, the wafer 5 is provided with a through hole matching the groove, the diameter of the through hole being smaller than the diameter of the groove.
Specifically, the particles enter from the inlet, are filtered by the microporous filter membrane 8, pass through the through holes on the pressure sheet 5, pass through the TEM carrier net 4 and the grooves, and finally pass out from the outlet.
The two TEM grid carriers 4 form a group, one pressing sheet 5 is used for fixing the group of TEM grid carriers 4, the end part of the pressing sheet 5 is provided with a through hole, and the middle part of the pressing sheet 5 is fixed on the grid carrier table 3 through a screw 6. The middle part of the pressing piece 5 is fixed on the net carrying table 3 through the screw 6, and compared with the situation that the edge of the pressing piece 5 is fixed on the net carrying table 3, the screw 6 can be prevented from blocking and interfering particles entering the through hole.
According to an embodiment of the invention, the filtering and trapping device further comprises a double-layer silica gel sleeve 7, the double-layer silica gel sleeve 7 is arranged on the pressing sheet 5, and the microporous filter membrane 8 is arranged on the double-layer silica gel sleeve 7, wherein the pressing sheet 5, the double-layer silica gel sleeve 7 and the microporous filter membrane 8 are in a sequentially stacked structure (fig. 1).
Specifically, a double-layer silica gel sleeve 7 is arranged on the pressing sheet 5; the microporous filter membrane 8 is fixed in the middle of the double-layer silica gel sleeve 7, and the microporous filter membrane 8 is fixed between the lower layer silica gel 7 and the upper layer silica gel 7 and is of a superposed structure (figure 1).
According to one embodiment of the present invention, a placing table protruding inward is provided in the capturing apparatus body 1, and the mesh table 3 is provided on the placing table.
Specifically, a placing table is provided in the middle of the trapping device body 1, so that the net carrying table 3 can be conveniently placed, and the TEM net carrying table 4 can be fixed.
According to one embodiment of the invention, the TEM carrier web 4 is an interference fit with the grooves and preforms 5.
Specifically, the TEM grid 4 can be tightly buckled in the groove of the grid carrying table 3, the pressing sheet 5 can tightly buckle the TEM grid 4, and the screw 6 can tightly fix the pressing sheet 5 on the grid carrying table 3. Prevent particles from entering loose parts to cause loss, and simultaneously can prolong the service life of the filtering and trapping device.
According to one embodiment of the invention, the sealing cover 2 is provided with a connecting part, the connecting part is provided with an external thread, and the trapping device body 1 is provided with an internal thread matched with the external thread.
The trapping device body 1 is detachably connected with the sealing cover 2 through threads, and the trapping device body 1 and the sealing cover 2 are good in sealing effect.
According to one embodiment of the invention, the diameter of the microporous filter membrane 8 is larger than the diameter of the TEM grid 4.
Specifically, the diameter of the microporous filter membrane 8 is far larger than that of the TEM grid 4 in the grid carrying table 3, and the microporous filter membrane 8 can be tightly buckled above the grid carrying table 3.
According to one embodiment of the present invention, the pore size of the microfiltration membrane 8 is not greater than 1 micron. For blocking the passage of particles larger than 1 micron in the soil and soil gas through the microporous filter membrane 8.
When the filtering and trapping device for the nanoparticles is used, the trapping device body 1 and the sealing cover 2 are connected through the threads at first when the filtering and trapping device is used every time, and the airtightness of the whole filtering and trapping device is tested through vacuumizing. The micro-porous filter membrane 8 is positioned on the net carrying table 3, the aperture of the micro-pores of the micro-porous filter membrane 8 is 1 micron, and the micro-porous filter membrane 8 is used for preventing micro-particles larger than 1 micron in the soil and the soil gas from penetrating through the micro-porous filter membrane 8, so that the micro-particles dispersed in the soil or the soil gas are cut off in a grading manner. The micro-porous filter membrane 8 and the TEM carrier net 4 are sequentially arranged in the closed space of the whole filtering and trapping device, the separation and trapping purposes are effectively finished, and finally the filter material is discharged from the outlet of the trapping device body 1. The whole closed space avoids the loss of the particles smaller than 1 micron, such as tube wall adsorption and the like, in the long-distance migration, and simultaneously can also avoid sample pollution, thereby greatly improving the trapping efficiency of the particles smaller than 1 micron. The TEM grid 4 is fixed by the grid table 3 and the pressing sheet 5, so that the problems of electrostatic jump and easy displacement of the TEM grid 4 are solved.
In conclusion, in the nanoparticle filtering and capturing device provided by the application, the fixing component is adopted to fix the TEM carrier net 4, so that the installation of the TEM carrier net 4 is facilitated, and the problems that the TEM carrier net 4 generates electrostatic jump and is easy to displace are solved. The trapping device body 1 is connected with the sealing cover 2, the microporous filter membrane 8 and the TEM carrier net 4 can effectively complete the separation and trapping processes in the whole closed device, the loss of the particles such as tube wall adsorption in the long-distance migration can be avoided, and the sample pollution can be avoided.
In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the communication may be direct, indirect via an intermediate medium, or internal to both elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In the description of the present invention, moreover, unless otherwise indicated,
"plurality" means two or more.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (10)

1. A nanoparticle filter trap, comprising:
the sealing cover is provided with an inlet;
the collecting device body is detachably connected with the sealing cover, and an outlet is formed in the collecting device body;
the TEM grid is fixed in the trapping device body through a fixing component;
a microporous filter membrane disposed within the trapping device body, and the microporous filter membrane is disposed between the inlet and the TEM carrier web.
2. The nanoparticle filter trap device according to claim 1, wherein: the fixing assembly includes:
the screen carrying table is provided with a groove, and the TEM screen is arranged in the groove;
the pressing sheet is fixed on the mesh carrying table, and the TEM mesh is positioned between the groove and the pressing sheet.
3. The nanoparticle filter trap device according to claim 2, wherein: the number of the TEM grid carriers is multiple, the grid carrier is provided with a plurality of grooves, and the number of the grooves is consistent with that of the TEM grid carriers.
4. The nanoparticle filter trap device according to claim 2, wherein: the pressing sheet is provided with a through hole matched with the groove, and the diameter of the through hole is smaller than that of the groove.
5. The nanoparticle filter trap device according to claim 2, wherein: the filtering and trapping device further comprises a double-layer silica gel sleeve, the double-layer silica gel sleeve is arranged on the pressing sheet, and the microporous filter membrane is arranged on the double-layer silica gel sleeve.
6. The nanoparticle filter trap device according to claim 2, wherein: the catching device is internally provided with a placing table protruding inwards, and the net carrying table is arranged on the placing table.
7. The nanoparticle filter trap device according to claim 2, wherein: the TEM carrier mesh is in interference fit with the groove and the pressing sheet.
8. The nanoparticle filter trap device according to claim 1, wherein: the sealing cover is provided with a connecting part, the connecting part is provided with an external thread, and the trapping device body is provided with an internal thread matched with the external thread.
9. The nanoparticle filter trap device according to claim 1, wherein: the diameter of the microporous filter membrane is larger than that of the TEM grid.
10. The nanoparticle filter trap device according to claim 1, wherein: the pore diameter of the microporous filter membrane is not more than 1 micron.
CN202011121879.7A 2020-10-20 2020-10-20 Nano-particle filtering and trapping device Pending CN112129790A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011121879.7A CN112129790A (en) 2020-10-20 2020-10-20 Nano-particle filtering and trapping device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011121879.7A CN112129790A (en) 2020-10-20 2020-10-20 Nano-particle filtering and trapping device

Publications (1)

Publication Number Publication Date
CN112129790A true CN112129790A (en) 2020-12-25

Family

ID=73852760

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011121879.7A Pending CN112129790A (en) 2020-10-20 2020-10-20 Nano-particle filtering and trapping device

Country Status (1)

Country Link
CN (1) CN112129790A (en)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007127427A (en) * 2005-11-01 2007-05-24 Kanomax Japan Inc Collection device of fine particles and collection method of fine particles
CN103196719A (en) * 2013-03-17 2013-07-10 中国科学院苏州纳米技术与纳米仿生研究所 Micro/nano-particle sample carrying mesh storage device for transmission electron microscope, and sample preparation method
CN104730291A (en) * 2013-12-19 2015-06-24 中芯国际集成电路制造(上海)有限公司 TEM sample carrying net supporting film, preparation method of TEM sample carrying net supporting film, and TEM sample analysis method
KR101569792B1 (en) * 2014-06-19 2015-11-19 한국과학기술연구원 Filter assembly for sampling for transmission electron microscope analysis and Manufacturing device thereof
CN106405159A (en) * 2016-11-23 2017-02-15 中国地质大学（北京） Device used for collecting nanoscale particles in underground soil gas
CN206270127U (en) * 2016-12-07 2017-06-20 石家庄市博乐实验器材科技有限公司 Atmospheric particulates multistage cutter
CN110346199A (en) * 2019-08-13 2019-10-18 中国地质科学院地球物理地球化学勘查研究所 Soil nanoparticles separation and collection device
CN111307847A (en) * 2020-03-11 2020-06-19 中国科学院地质与地球物理研究所 Micro-nano-scale sample vacuum storage device
CN213633231U (en) * 2020-10-20 2021-07-06 中国地质科学院地球物理地球化学勘查研究所 Nano-particle filtering and trapping device

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007127427A (en) * 2005-11-01 2007-05-24 Kanomax Japan Inc Collection device of fine particles and collection method of fine particles
CN103196719A (en) * 2013-03-17 2013-07-10 中国科学院苏州纳米技术与纳米仿生研究所 Micro/nano-particle sample carrying mesh storage device for transmission electron microscope, and sample preparation method
CN104730291A (en) * 2013-12-19 2015-06-24 中芯国际集成电路制造(上海)有限公司 TEM sample carrying net supporting film, preparation method of TEM sample carrying net supporting film, and TEM sample analysis method
KR101569792B1 (en) * 2014-06-19 2015-11-19 한국과학기술연구원 Filter assembly for sampling for transmission electron microscope analysis and Manufacturing device thereof
CN106405159A (en) * 2016-11-23 2017-02-15 中国地质大学（北京） Device used for collecting nanoscale particles in underground soil gas
CN206270127U (en) * 2016-12-07 2017-06-20 石家庄市博乐实验器材科技有限公司 Atmospheric particulates multistage cutter
CN110346199A (en) * 2019-08-13 2019-10-18 中国地质科学院地球物理地球化学勘查研究所 Soil nanoparticles separation and collection device
CN111307847A (en) * 2020-03-11 2020-06-19 中国科学院地质与地球物理研究所 Micro-nano-scale sample vacuum storage device
CN213633231U (en) * 2020-10-20 2021-07-06 中国地质科学院地球物理地球化学勘查研究所 Nano-particle filtering and trapping device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
王学求;张必敏;叶荣;: "纳米地球化学与覆盖区矿产勘查", 矿物岩石地球化学通报, no. 01, 10 January 2016 (2016-01-10) *

Similar Documents

Publication Publication Date Title
US7437908B2 (en) Particle counter
He et al. Filtration performance and charge degradation during particle loading and reusability of charged PTFE needle felt filters
US7334453B2 (en) Modular particulate sampler
CN213633231U (en) Nano-particle filtering and trapping device
EP3328549B1 (en) Method for the selective purification of aerosols
Wang et al. Filtration properties of carbon woven fabric filters supplied with high voltage for removal of PM 1.0 particles
CN110346199B (en) Soil nano particle separating and trapping device
CN112129790A (en) Nano-particle filtering and trapping device
JP2017166947A (en) Gas detection device
CN102798553A (en) PM2.5 (Particular Matter 2.5) single-grade atmosphere sampling cutter
CN210638989U (en) Soil nanometer particle separating and trapping device
CN112539976A (en) Be used for gaseous multiple spot sampling test equipment on line
KR101569792B1 (en) Filter assembly for sampling for transmission electron microscope analysis and Manufacturing device thereof
CN106405159B (en) Apparatus for collecting nanoscale particles in subsurface soil gas
JPWO2006098397A1 (en) Electrostatic concentration collector for ultrafine particles and submicron particle remover used therefor
EP1041377A2 (en) A sampler and method for obtaining size distributions of aerosol particles
RU2525539C1 (en) Electric precipitator
WO2018152683A1 (en) Layered filter assembly for enclosure protection
US20050217392A1 (en) Desorber
CN114371183A (en) An in situ battery device for soft X-ray microscopy
JP3845359B2 (en) Airborne particulate matter concentration measuring device
JP7372081B2 (en) Capture device and capture method
CN202141615U (en) A PM2.5 single-stage atmospheric sampling cutter
WO2004003520A1 (en) Two-stage particle-size analyser
CN201034877Y (en) Small-sized powder dust trapping device used for spectrometer vacuum system

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination