CN105717005A - PM2.5 monitoring method based on particle size - Google Patents
PM2.5 monitoring method based on particle size Download PDFInfo
- Publication number
- CN105717005A CN105717005A CN201610169501.1A CN201610169501A CN105717005A CN 105717005 A CN105717005 A CN 105717005A CN 201610169501 A CN201610169501 A CN 201610169501A CN 105717005 A CN105717005 A CN 105717005A
- Authority
- CN
- China
- Prior art keywords
- filter screen
- particle diameter
- method based
- monitoring method
- fine particle
- 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
Links
- 239000002245 particle Substances 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000012544 monitoring process Methods 0.000 title claims abstract description 20
- 239000010419 fine particle Substances 0.000 claims abstract description 40
- 238000004458 analytical method Methods 0.000 claims abstract description 7
- 238000001514 detection method Methods 0.000 claims abstract description 5
- 238000001914 filtration Methods 0.000 claims description 9
- 239000000284 extract Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000012528 membrane Substances 0.000 description 6
- 239000013618 particulate matter Substances 0.000 description 3
- 230000005250 beta ray Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- OKTJSMMVPCPJKN-NJFSPNSNSA-N Carbon-14 Chemical compound [14C] OKTJSMMVPCPJKN-NJFSPNSNSA-N 0.000 description 1
- 208000018569 Respiratory Tract disease Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009514 concussion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000008821 health effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/02—Investigating particle size or size distribution
- G01N15/0272—Investigating particle size or size distribution with screening; with classification by filtering
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/02—Investigating particle size or size distribution
- G01N2015/0288—Sorting the particles
Landscapes
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a PM2.5 monitoring method based on the particle size. A certain amount of dried air to be tested is introduced into a closed container, the closed container is provided with two or more filter nets of different through hole diameters from top to bottom; then, the closed container is closed, standing is performed for 10-30 min, and fine particles in the air to be tested are filtered sufficiently through the filter nets; all the filter nets are taken from the closed container a few days later, the fine particles of the corresponding particle size are extracted from the filter nets of different through hole diameters, and detection analysis is performed. The method is achieved through uniformly-distributed arrayed through holes of different sizes formed in the filter nets by adopting the fine manufacturing technology, the shape precision of the through holes is controllable, and therefore the monitoring result is accurate and reliable.
Description
Technical field
The present invention relates to chemical analysis field, particularly to a kind of PM2.5 monitoring method based on particle diameter.
Background technology
PM2.5 and fine particle, refer to the atmospheric environment air kinetic diameter particulate matter less than or equal to 2.5 μm.Although PM2.5 is that in earth atmosphere air, content is a little, but it is very big to environment and Human health effects, the pellet of different-grain diameter is trapped in the different parts of respiratory tract will cause different respiratory tract diseases, and PM2.5 has a strong impact on air quality and visibility.Therefore, monitor PM2.5 based on particle diameter to can be used for making a concrete analysis of the PM2.5 impact on health and environment.
At present, the main method monitoring particulate in air based on particle diameter has: (1) filter membrane weight method, it is extract a certain amount of volumes of air by sampler with constant rate of speed, particulate matter in air is trapped within filter membrane, in conjunction with filter membrane weight before sampling after change and sampled air volume, calculate concentration；But some superfine little granules still can pass filter membrane and cause Lower result, other materials are likely to and are caused result higher by filter membrane absorption simultaneously.(2) β ray method, its ultimate principle is to utilize the change being deposited in the β ray attenuation amount that carbon-14 is discharged by the particulate matter adapted on filter membrane to measure the change of Atmospheric particulates quality, but determination data generally there are deviation, and significantly high in the fault rate of moist high-temperature area.(3) trace concussion sedimentation balance method, mainly by conical component trace oscillating balance principle, but current technology cannot solve the loss of volatility and half volatile material after sample heats, and causes that measurement result is on the low side.And, the above-mentioned particle monitoring method being all in particle size range aspect, monitoring result is comparatively coarse, it is impossible to according to its particle diameter, PM2.5 is accurately monitored, thus detection and subsequent analysis to PM2.5 impact.
Summary of the invention
It is an object of the invention to overcome the shortcoming existed in prior art, a kind of PM2.5 monitoring method based on particle diameter is provided, fine particle is monitored by this method for the size according to fine particle size, technique is simple, easy to operate, it is adaptable to particulate in air is needed by grain size grading sampling aspect.
The purpose of the present invention is achieved through the following technical solutions:
A kind of PM2.5 monitoring method based on particle diameter, is that fine particle is screened by the size according to fine particle size, comprises the steps:
(1) a certain amount of air to be checked after drying is passed in hermetic container 1, hermetic container 1 is equipped with the filter screen of two or more different through-hole diameter from top to bottom；
(2) then hermetic container 1 is sealed, stand 10～30 minutes, make the fine particle 5 in air to be checked be fully filtered by each filter screen；
(3) from hermetic container 1, take out all of filter screen, from the filter screen of different through-hole diameters, extract the fine particle 5 of corresponding particle diameter respectively, and carry out detection analysis.
In step 2, applying vibration to assist fine particle to filter to filter screen, amplitude and frequency are controlled, and wherein amplitude range is 0.1～1mm, and frequency range is below 20Hz.
The shape of filter screen is unrestricted, and can justify can be square；The size of filter screen is also unrestricted, determines according to concrete equipment and situation；The through hole pore diameter size of filter screen is determined according to the size of the fine particle to collect, through hole generally circular in shape.
On described filter screen, distribution has uniform array through-hole, and the thickness range of filter screen is at 1～5mm.
Described filter screen adopts the smooth surfaces such as metal, polymer or glass and is prone to the material of microfabrication.
Described filter screen has 3, including filter screen 2, filter screen 3, filter screen 4.
The through-hole diameter of described filter screen 2 is 2.5um, for filtering the particle diameter fine particle 5 less than 2.5um；The through-hole diameter of filter screen 3 is 1.5um, for filtering the particle diameter fine particle 5 less than 1.5um；The through-hole diameter of filter screen 4 is 0.5um, for filtering the particle diameter fine particle 5 less than 0.5um.Furthermore, it is possible to by preparing the screening that the filter screen of different through-hole diameter realizes the fine particle of different-grain diameter size.
Wherein, the particle diameter of the fine particle 5 that filter screen 2 is collected is be more than or equal to 2.5um；The particle diameter of the fine particle 5 that filter screen 3 is collected is between 1.5-2.5um；The particle diameter of the fine particle 5 that filter screen 4 is collected is between 0.5-1.5um.
The present invention compared with prior art has the advantage that and effect:
(1) present invention has different size of uniform array through-hole realize by adopting micro-fabrication technology to prepare on filter screen, and shape of through holes precision is controlled, thus carrying out monitoring result accurately and reliably.
(2) air to be checked is dried process by the present invention so that fine particle will not adhere to and reunite, and extracts and easy to detect.
(3) present invention is deposited on, by fine particle, the screening based on size that smooth screen surface realizes.
Accompanying drawing explanation
Fig. 1 is the structural representation of hermetic container and filter screen.
Fig. 2 is the fine particle process schematic by filter screen.
Fig. 3 is the schematic diagram that fine particle is retained by filter screen.
In figure, 1: hermetic container；2, filter screen；3, filter screen；4, filter screen；5, fine particle.
Detailed description of the invention
Below in conjunction with embodiment, the present invention done further detailed description, but embodiments of the present invention are not limited to this.
Embodiment
A kind of PM2.5 monitoring method based on particle diameter, is that fine particle is screened by the size according to fine particle size, comprises the steps:
(1) a certain amount of air to be checked after drying is passed in hermetic container 1, hermetic container 1 is equipped with three filter screens from top to bottom, including filter screen 2, filter screen 3, filter screen 4；The through-hole diameter of filter screen 2 is 2.5um, for filtering the particle diameter fine particle 5 less than 2.5um；The through-hole diameter of filter screen 3 is 1.5um, for filtering the particle diameter fine particle 5 less than 1.5um；The through-hole diameter of filter screen 4 is 0.5um, for filtering the particle diameter fine particle 5 less than 0.5um；
(2) then hermetic container 1 is sealed, stand 10～30 minutes, make the fine particle 5 in air to be checked be fully filtered by each filter screen；Meanwhile, applying vibration to assist fine particle to filter to filter screen, amplitude and frequency are controlled, and wherein amplitude range is 0.1～1mm, and frequency range is below 20Hz；
(3) taking out all of filter screen from hermetic container 1, extract the fine particle 5 of corresponding particle diameter respectively, and carry out detection analysis from the filter screen of different through-hole diameters, wherein the particle diameter of the fine particle 5 that filter screen 2 is collected is be more than or equal to 2.5um；The particle diameter of the fine particle 5 that filter screen 3 is collected is between 1.5-2.5um；The particle diameter of the fine particle 5 that filter screen 4 is collected is between 0.5-1.5um.
On described filter screen, distribution has uniform array through-hole, and the thickness range of filter screen is at 1～5mm；And adopt the smooth surfaces such as metal, polymer or glass and be prone to the material of microfabrication.
Claims (8)
1. the PM2.5 monitoring method based on particle diameter, it is characterised in that comprise the steps:
(1) a certain amount of air to be checked after drying is passed in hermetic container, hermetic container is equipped with the filter screen of two or more different through-hole diameter from top to bottom；
(2) then hermetic container is sealed, stand 10～30 minutes, make the fine particle in air to be checked be fully filtered by each filter screen；
(3) from hermetic container, take out all of filter screen, from the filter screen of different through-hole diameters, extract the fine particle of corresponding particle diameter respectively, and carry out detection analysis.
2. the PM2.5 monitoring method based on particle diameter according to claim 1, it is characterised in that: in step 2, applying vibration to assist fine particle to filter to filter screen, amplitude range is 0.1～1mm, and frequency range is below 20Hz.
3. the PM2.5 monitoring method based on particle diameter according to claim 1, it is characterised in that: on described filter screen, distribution has uniform array through-hole, and through hole generally circular in shape, the thickness range of filter screen is at 1～5mm.
4. the PM2.5 monitoring method based on particle diameter according to claim 1, it is characterised in that: described filter screen adopts metal, polymer or glass material.
5. the PM2.5 monitoring method based on particle diameter according to claim 1, it is characterised in that: described filter screen has 3, including filter screen (2), filter screen (3), filter screen (4).
6. the PM2.5 monitoring method based on particle diameter according to claim 5, it is characterised in that: the through-hole diameter of described filter screen (2) is 2.5um, for filtering the particle diameter fine particle less than 2.5um.
7. the PM2.5 monitoring method based on particle diameter according to claim 5, it is characterised in that: the through-hole diameter of filter screen (3) is 1.5um, for filtering the particle diameter fine particle less than 1.5um.
8. the PM2.5 monitoring method based on particle diameter according to claim 5, it is characterised in that: the through-hole diameter of filter screen (4) is 0.5um, for filtering the particle diameter fine particle less than 0.5um.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610169501.1A CN105717005A (en) | 2016-03-22 | 2016-03-22 | PM2.5 monitoring method based on particle size |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610169501.1A CN105717005A (en) | 2016-03-22 | 2016-03-22 | PM2.5 monitoring method based on particle size |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105717005A true CN105717005A (en) | 2016-06-29 |
Family
ID=56158199
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610169501.1A Pending CN105717005A (en) | 2016-03-22 | 2016-03-22 | PM2.5 monitoring method based on particle size |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105717005A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106092669A (en) * | 2016-07-27 | 2016-11-09 | 广东工业大学 | A kind of method and apparatus of grid fractionated particulate in air based on particle diameter |
| CN111829838A (en) * | 2020-06-05 | 2020-10-27 | 广州医科大学附属第一医院 | PM2.5 collection and extraction method suitable for biological research |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2757954B2 (en) * | 1994-10-27 | 1998-05-25 | 財団法人塩事業センター | Preparation method of particle size distribution measurement sample in salt production |
| DE20314455U1 (en) * | 2003-09-15 | 2004-02-26 | Wenzel, Volker | Pollutant tester for monitoring air samples for gaseous residues, e.g. PCBs, contains a solid as absorbent or adsorbent arranged in a semi-permeable polyethylene film |
| US6786105B1 (en) * | 2001-10-09 | 2004-09-07 | University Of Southern California | Personal particle monitor |
| CN1695771A (en) * | 2005-03-25 | 2005-11-16 | 清华大学 | Sampler for aerosol granules |
| CN201622187U (en) * | 2009-12-23 | 2010-11-03 | 青岛崂山电子仪器总厂有限公司 | Multistage particulate matter cutter |
| CN102589937A (en) * | 2012-02-01 | 2012-07-18 | 武汉智迅创源科技发展股份有限公司 | Air monitoring and classified sampling method and device |
| CN102680349A (en) * | 2012-03-30 | 2012-09-19 | 北京盈胜泰科技术有限公司 | PM2.5 monitoring equipment |
| CN103207109A (en) * | 2013-04-07 | 2013-07-17 | 江西怡杉环保有限公司 | Device and method for performing numerically-controlled dehumidification temperature regulation on air particulate matter concentration monitoring sample collection |
-
2016
- 2016-03-22 CN CN201610169501.1A patent/CN105717005A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2757954B2 (en) * | 1994-10-27 | 1998-05-25 | 財団法人塩事業センター | Preparation method of particle size distribution measurement sample in salt production |
| US6786105B1 (en) * | 2001-10-09 | 2004-09-07 | University Of Southern California | Personal particle monitor |
| DE20314455U1 (en) * | 2003-09-15 | 2004-02-26 | Wenzel, Volker | Pollutant tester for monitoring air samples for gaseous residues, e.g. PCBs, contains a solid as absorbent or adsorbent arranged in a semi-permeable polyethylene film |
| CN1695771A (en) * | 2005-03-25 | 2005-11-16 | 清华大学 | Sampler for aerosol granules |
| CN201622187U (en) * | 2009-12-23 | 2010-11-03 | 青岛崂山电子仪器总厂有限公司 | Multistage particulate matter cutter |
| CN102589937A (en) * | 2012-02-01 | 2012-07-18 | 武汉智迅创源科技发展股份有限公司 | Air monitoring and classified sampling method and device |
| CN102680349A (en) * | 2012-03-30 | 2012-09-19 | 北京盈胜泰科技术有限公司 | PM2.5 monitoring equipment |
| CN103207109A (en) * | 2013-04-07 | 2013-07-17 | 江西怡杉环保有限公司 | Device and method for performing numerically-controlled dehumidification temperature regulation on air particulate matter concentration monitoring sample collection |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106092669A (en) * | 2016-07-27 | 2016-11-09 | 广东工业大学 | A kind of method and apparatus of grid fractionated particulate in air based on particle diameter |
| CN106092669B (en) * | 2016-07-27 | 2019-08-09 | 广东工业大学 | A kind of method and apparatus of the grid classification separation particulate in air based on partial size |
| CN111829838A (en) * | 2020-06-05 | 2020-10-27 | 广州医科大学附属第一医院 | PM2.5 collection and extraction method suitable for biological research |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102589937B (en) | Air monitoring and classified sampling method and device | |
| Li et al. | Evaluation of six inhalable aerosol samplers | |
| CN104535448A (en) | Method for measuring absorptive capacity of plant leaves to particles and adsorption particle size grades | |
| CN205719872U (en) | A kind of PM2.5 monitoring device based on particle diameter | |
| CN102798552B (en) | PM10 single-stage atmosphere sampling cutter | |
| WO2009105469A3 (en) | Test procedure to determine concentration and relative distribution of sized particles in a drilling fluid | |
| CN105717005A (en) | PM2.5 monitoring method based on particle size | |
| CN201508291U (en) | Cutter for particles | |
| CN104237087A (en) | Gas particulate matter (PM) concentration detector and using method thereof | |
| CN206270127U (en) | Atmospheric particulates multistage cutter | |
| CN111076992A (en) | Soil separation detecting system | |
| Mitchell | Aerosol generation for instrument calibration | |
| CN108918501A (en) | A kind of silver-paper base SERS test paper and preparation method thereof | |
| CN106323828A (en) | Environment sampling and monitoring system and method based on fine particles | |
| John et al. | Aerosol testing techniques for size-selective samplers | |
| CN106092669B (en) | A kind of method and apparatus of the grid classification separation particulate in air based on partial size | |
| CN105716930A (en) | PM2.5 screening method based on particle size | |
| CN105334082B (en) | A kind of Passive sampler | |
| CN205786028U (en) | A kind of PM2.5 screening plant based on particle diameter | |
| EP3356814B1 (en) | Methods for determining the particle size distribution of granular material in a delivery flow, and devices for carrying out the methods | |
| CN105866152A (en) | Preparation method of transmission electron microscope samples of atmospheric particulates | |
| CN215262677U (en) | Automatic sampling device of inhalable particles | |
| CN107907388A (en) | The device of micro dust and the method for detection grain diameter and content in a kind of collection gas | |
| CN203758800U (en) | Double-pole PM (Particulate Matter) 10/PM2.5 sampler based on virtual impact theory | |
| CN206848119U (en) | A kind of dust concentration monitoring system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160629 |