CN111289412A - Individual dust sampling and measuring method - Google Patents
Individual dust sampling and measuring method Download PDFInfo
- Publication number
- CN111289412A CN111289412A CN202010084686.2A CN202010084686A CN111289412A CN 111289412 A CN111289412 A CN 111289412A CN 202010084686 A CN202010084686 A CN 202010084686A CN 111289412 A CN111289412 A CN 111289412A
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- China
- Prior art keywords
- sampling
- filter membrane
- dust
- sampler
- individual dust
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- 238000005070 sampling Methods 0.000 title claims abstract description 76
- 239000000428 dust Substances 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000012528 membrane Substances 0.000 claims abstract description 37
- 238000005303 weighing Methods 0.000 claims abstract description 9
- 238000004458 analytical method Methods 0.000 claims abstract description 6
- 238000005259 measurement Methods 0.000 claims abstract description 6
- 238000002360 preparation method Methods 0.000 claims abstract description 4
- 230000000241 respiratory effect Effects 0.000 claims description 10
- 230000035945 sensitivity Effects 0.000 claims description 4
- CYTYCFOTNPOANT-UHFFFAOYSA-N Perchloroethylene Chemical group ClC(Cl)=C(Cl)Cl CYTYCFOTNPOANT-UHFFFAOYSA-N 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 239000000741 silica gel Substances 0.000 claims description 3
- 229910002027 silica gel Inorganic materials 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 238000003556 assay Methods 0.000 claims 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000007787 solid 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
- G01N15/06—Investigating concentration of particle suspensions
- G01N15/0606—Investigating concentration of particle suspensions by collecting particles on a support
- G01N15/0618—Investigating concentration of particle suspensions by collecting particles on a support of the filter type
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 method for sampling and measuring individual dust, which comprises the following steps: step 1, selecting measurement equipment, including an individual dust sampler, a filter membrane, a flowmeter, an air extractor, a micro motor, a battery, a timer, an analysis antenna and a dryer; step 2, preparation before sampling; step 3, sampling; step 4, weighing and recording the filter membrane; and 5, calculating the dust concentration. The individual dust sampling and measuring method is scientific and reasonable, convenient to operate and accurate in result.
Description
Technical Field
The invention relates to the technical field of dust measurement, in particular to an individual dust sampling and measuring method.
Background
The dust concentration refers to the amount of dust contained in a unit volume of air. Workplace refers to all locations where workers are performing professional activities. Airborne dust refers to solid particles that are suspended in air for extended periods of time.
Workers repeatedly contact a certain amount of dust for a long time in the process of professional activities, and harm can be caused to human health. Therefore, in order to protect the physical health of workers, the dust in the air of a workplace needs to be sampled and measured by individuals.
Disclosure of Invention
The invention aims to provide an individual dust sampling and measuring method which is scientific and reasonable, convenient to operate and accurate in result.
In order to achieve the above object, the present invention provides an individual dust sampling and measuring method comprising:
step 1, selecting measurement equipment, including an individual dust sampler, a filter membrane, a flowmeter, an air extractor, a micro motor, a battery, a timer, an analysis antenna and a dryer;
step 2, preparation before sampling;
step 3, sampling;
step 4, weighing and recording the filter membrane;
and 5, calculating the dust concentration.
Preferably, the filter membrane is a qualified perchloroethylene fiber filter membrane.
Preferably, the micro motor and the battery can continuously work for more than 8 h.
Preferably, the timer is a stopwatch and the sampling is synchronized with the timing.
Preferably, the analytical balance selects an analytical balance with a sensitivity of one ten thousandth of a gram when measuring total dust and one hundred thousandth of a gram when measuring respiratory dust.
Preferably, the color-changing silica gel is contained in the dryer.
Preferably, step 2 comprises weighing and numbering the filter membrane, placing the filter membrane into a filter membrane clamp, charging a battery of the sampler, and zeroing a timer.
Preferably, the step 3 comprises placing the filter membrane clamp into a sampling head, wherein the sampling head is consistent with the sampler in number, adjusting the flow rate to 2.0L/min, tightly connecting the sampling head with the sampler by using a plastic tube, fixing the sampler at the waist, and downwards fixing the inlet of the sampling head on a respiratory belt accessory.
Preferably, the recording in step 4 includes recording the number, work type, labor condition and environment of the detected worker, name, sampling head and filter membrane, opening the sampler switch, starting sampling and timing, observing and recording the flow on the flowmeter, and then closing the sampler switch to record the sampling time.
Preferably, the dust concentration calculation formula in step 5 is:
wherein C is the dust concentration mg/m3，m1The mass of the filter membrane before sampling is mg, m2The mass mg of the filter membrane after sampling, t is the sampling duration min, and Q is the sampling flow L/min.
According to the technical scheme, the invention sequentially selects measuring equipment comprising an individual dust sampler, a filter membrane, a flowmeter, an air extractor, a micro motor, a battery, a timer, an analysis antenna and a dryer; preparing before sampling, then sampling, weighing and recording a filter membrane, and finally calculating the dust concentration. Specifically, the dust collector is worn near a respiratory belt of a sampling head in the measuring process and collects dust along with movement. Thus, the sampling space and time are consistent with the actual dust receiving condition, and the average dust concentration contacted by one working shift for 8h is successfully determined. And the total dust concentration and the respiratory dust concentration can be determined according to different sampling heads arranged on the sampler. The whole process is scientific and reasonable, the operation is convenient, and the result is accurate.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Detailed Description
The following describes in detail specific embodiments of the present invention. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
In the present invention, unless otherwise specified, the directional words "upper, lower" and the like included in the terms merely represent the orientation of the terms in the conventional use state or are colloquially known by those skilled in the art, and should not be construed as limiting the terms.
The invention provides a method for sampling and measuring individual dust, which is characterized by comprising the following steps:
step 1, selecting measurement equipment, including an individual dust sampler, a filter membrane, a flowmeter, an air extractor, a micro motor, a battery, a timer, an analysis antenna and a dryer;
step 2, preparation before sampling;
step 3, sampling;
step 4, weighing and recording the filter membrane;
and 5, calculating the dust concentration.
In this embodiment, in order to ensure that the results of the measurement using the filter membrane are accurate and reliable, the filter membrane is preferably a qualified perchloroethylene fiber filter membrane.
In order to obtain a sufficient period of sampling by the individual dust sampling measurement method, it is preferable that the micro motor and the battery are continuously operated for 8 hours or more.
The timer is a stopwatch and the sampling and timing are synchronized.
The analytical balance selects an analytical balance with a sensitivity of one ten thousandth of a gram when measuring total dust, and selects an analytical balance with a sensitivity of one hundred thousandth of a gram when measuring respiratory dust.
The color-changing silica gel is contained in the dryer.
And step 2, weighing and numbering the filter membrane, putting the filter membrane into a filter membrane clamp, charging a sampler battery, and zeroing a timer.
And step 3, placing the filter membrane clamp into a sampling head, wherein the sampling head is consistent with the sampling device in number, adjusting the flow rate to be 2.0L/min, tightly connecting the sampling head and the sampling device by using a plastic tube, fixing the sampling device on the waist, and downwards fixing the inlet of the sampling head on a respiratory belt accessory.
And 4, recording the name, the sampling head, the filter membrane number, the work type, the labor condition and the environment of the tested worker, starting a sampler switch, starting sampling and timing, observing and recording the flow on the flowmeter, and then closing the sampler switch to record the sampling time.
The dust concentration calculation formula in the step 5 is as follows:
wherein C is the dust concentration mg/m3，m1The mass of the filter membrane before sampling is mg, m2The mass mg of the filter membrane after sampling, t is the sampling duration min, and Q is the sampling flow L/min.
Through the technical scheme, the measuring equipment is selected in sequence and comprises an individual dust sampler, a filter membrane, a flowmeter, an air extractor, a micro motor, a battery, a timer, an analysis antenna and a dryer; preparing before sampling, then sampling, weighing and recording a filter membrane, and finally calculating the dust concentration. Specifically, the dust collector is worn near a respiratory belt of a sampling head in the measuring process and collects dust along with movement. Thus, the sampling space and time are consistent with the actual dust receiving condition, and the average dust concentration contacted by one working shift for 8h is successfully determined. And the total dust concentration and the respiratory dust concentration can be determined according to different sampling heads arranged on the sampler. The whole process is scientific and reasonable, the operation is convenient, and the result is accurate.
The preferred embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (10)
1. An individual dust sampling assay method, comprising:
step 1, selecting measurement equipment, including an individual dust sampler, a filter membrane, a flowmeter, an air extractor, a micro motor, a battery, a timer, an analysis antenna and a dryer;
step 2, preparation before sampling;
step 3, sampling;
step 4, weighing and recording the filter membrane;
and 5, calculating the dust concentration.
2. A method for sampling and determining individual dust according to claim 1, wherein the filter is a certified perchloroethylene fibre filter.
3. The method of claim 1, wherein the micro-motor and the battery are capable of operating continuously for more than 8 hours.
4. A method of sampling and determining individual dust according to claim 1, wherein the timer is a stopwatch and the sampling is synchronized with the timing.
5. An individual dust sampling assay of claim 1 wherein the analytical balance selects an analytical balance with a sensitivity of one ten thousandth of a gram when assaying total dust and one hundred thousandth of a gram when assaying respiratory dust.
6. A method for sampling and measuring individual dust according to claim 1, wherein the desiccator contains allochroic silica gel.
7. The method as claimed in claim 1, wherein step 2 comprises weighing and numbering the filter membrane, placing the filter membrane into a filter clamp, charging the battery of the sampler, and zeroing the timer.
8. The method as claimed in claim 1, wherein the step 3 comprises placing the filter membrane holder into a sampling head, the sampling head and the sampling device are numbered in the same way, adjusting the flow rate to 2.0L/min, tightly connecting the sampling head and the sampling device with a plastic tube, fixing the sampling device on the waist, and fixing the sampling head with the inlet downwards on the respiratory belt accessory.
9. The method for sampling and measuring individual dust according to claim 1, wherein the recording in step 4 comprises recording the name of the worker to be measured, the serial number of the sampling head and the filter membrane, the work type, the working condition and the environment, opening a sampler switch, starting sampling and timing, observing and recording the flow on the flowmeter, and then closing the sampler switch to record the sampling time.
10. The method according to claim 1, wherein the dust concentration in step 5 is calculated by the formula:
wherein C is the dust concentration mg/m3，m1The mass of the filter membrane before sampling is mg, m2The mass mg of the filter membrane after sampling, t is the sampling duration min, and Q is the sampling flow L/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010084686.2A CN111289412A (en) | 2020-02-10 | 2020-02-10 | Individual dust sampling and measuring method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010084686.2A CN111289412A (en) | 2020-02-10 | 2020-02-10 | Individual dust sampling and measuring method |
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| CN111289412A true CN111289412A (en) | 2020-06-16 |
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| CN202010084686.2A Pending CN111289412A (en) | 2020-02-10 | 2020-02-10 | Individual dust sampling and measuring method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113008722A (en) * | 2021-04-05 | 2021-06-22 | 中国人民解放军63966部队 | Method for measuring dust content in armored vehicle |
| CN115938206A (en) * | 2022-07-20 | 2023-04-07 | 湖北省疾病预防控制中心（湖北省预防医学科学院） | Intelligent air dust sampler teaching demonstration instrument and operation method thereof |
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| CN101858832A (en) * | 2009-04-13 | 2010-10-13 | 武汉市碧海云天环保科技有限责任公司 | Intelligent constant-flow individual air dust sampler and constant-flow control method |
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| CN110006801A (en) * | 2019-05-10 | 2019-07-12 | 苏州华能检测技术有限公司 | A kind of atmospheric dust concentration detection method |
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2020
- 2020-02-10 CN CN202010084686.2A patent/CN111289412A/en active Pending
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| CN101122556A (en) * | 2007-05-29 | 2008-02-13 | 合肥霍金光电科技有限公司 | Atmosphere particles- carbon black aerosol quality and concentration monitor and monitoring method |
| CN101334349A (en) * | 2007-06-27 | 2008-12-31 | 中国石油天然气股份有限公司 | Online detection method and device for dust in high-pressure natural gas pipeline |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113008722A (en) * | 2021-04-05 | 2021-06-22 | 中国人民解放军63966部队 | Method for measuring dust content in armored vehicle |
| CN115938206A (en) * | 2022-07-20 | 2023-04-07 | 湖北省疾病预防控制中心（湖北省预防医学科学院） | Intelligent air dust sampler teaching demonstration instrument and operation method thereof |
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Application publication date: 20200616 |
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