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HJ 93-2013: Specifications and Test Procedures for PM10 and PM2.5 Sampler
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Specifications and Test Procedures for PM10 and PM2.5 Sampler
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Basic data | Standard ID | HJ 93-2013 (HJ93-2013) | | Description (Translated English) | Specifications and Test Procedures for PM10 and PM2.5 Sampler | | Sector / Industry | Environmental Protection Industry Standard | | Classification of Chinese Standard | Z15 | | Classification of International Standard | 13.040.20 | | Word Count Estimation | 43,490 | | Older Standard (superseded by this standard) | HJ/T 93-2003 | | Quoted Standard | GB 3095-2012; GB/T 3768; HJ 618 | | Regulation (derived from) | Department of Environmental Protection Notice No. 48 of 2013 | | Issuing agency(ies) | Ministry of Ecology and Environment | | Summary | This standard specifies: ambient air particulate matter (PM10 and PM2. 5) sampler technical requirements, performance indicators and detection methods. This standard applies to the ambient air particulate matter (PM10 and PM2. 5) take control design, prod | HJ 93-2013: Specifications and Test Procedures for PM10 and PM2.5 Sampler---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Specifications and Test Procedures for PM10 and PM2.5 Sampler
National Environmental Protection Standard of the People's Republic
Replace HJ/T 93-2003
Environmental air particulate matter (PM10 and PM2.5) sampler technical requirements and
Detection method
Released on.2013-07-30
2013-08-01 implementation
Ministry of Environmental Protection released
Content
Foreword..III
1 Scope 1
2 Normative references 1
3 Terms and Definitions..1
4 sampler composition..2
5 Technical requirements 3
6 performance indicators 4
7 Detection method 6
8 Test items.15
Appendix A (Normative Appendix) Airtightness Index Inspection Method.17
Appendix B (informative) Small flow impact cutter drawings..18
Foreword
Implementing the "Environmental Protection Law of the People's Republic of China"
Air Quality Standards (GB 3095-2012), which regulates the performance of particulate matter (PM10 and PM2.5) samplers in ambient air,
Quality, develop this standard.
This standard specifies ambient air particulate matter (PM10 and PM2.5) samplers (hereinafter referred to as PM10 and PM2.5 samplers).
Technical requirements, performance indicators and testing methods.
This standard is a revision of the "PM10 Sampler Technical Requirements and Test Methods" (HJ/T 93-2003).
This standard was first published in.2003 and this is the first revision. This revision adds to the relevance of the PM2.5 sampler
content.
From the date of implementation of this standard, the "PM10 Sampler Technical Requirements and Test Methods" (HJ/T 93-2003) shall be abolished.
PM10 and PM2.5 samplers entering the national environmental monitoring network shall comply with the requirements of this standard.
Appendix A of this standard is a normative appendix, and Appendix B is an informative appendix.
This standard was formulated by the Science and Technology Standards Department of the Ministry of Environmental Protection.
This standard is mainly drafted by. China Environmental Monitoring Center.
This standard was approved by the Ministry of Environmental Protection on July 30,.2013.
This standard has been implemented since August 1,.2013.
This standard is explained by the Ministry of Environmental Protection.
Environmental air particulate matter (PM10 and PM2.5) sampler technical requirements and testers
1 Scope of application
This standard specifies the technical requirements, performance indicators and test methods for ambient air particulate matter (PM10 and PM2.5) samplers.
law.
This standard applies to the design, production and testing of ambient air particulate matter (PM10 and PM2.5) samplers.
2 Normative references
The contents of this standard refer to the terms in the following documents. For undated references, the valid version applies to this
standard.
GB 3095-2012 Ambient Air Quality Standard
GB 3768 Acoustic sound pressure method for the determination of noise source sound power level
Easy law
HJ 618 Ambient air PM10 and PM2.5
3 Terms and definitions
The following terms and definitions apply to this standard.
3.1
Aerodynamic equivalent diameter aerodynamic diameter
Refers to a sphere with a unit density (ρ0=1g/cm3) that reaches the actual particle when moving in a low air at low Reynolds number
The diameter at the same final settling velocity.
3.2
Particulate matter (particle size less than or equal to 10μm) particulate matter(PM10)
Refers to particulate matter with aerodynamic equivalent diameter of 10 μm or less in ambient air, also known as inhalable particulate matter.
3.3
Particulate matter (particle size less than or equal to 2.5 μm) particulate matter (PM2.5)
Refers to particulate matter with an aerodynamic equivalent diameter of 2.5 μm or less in ambient air, also known as fine particulate matter.
3.4
Particle separate device
Refers to a device that has the function of separating particles of different particle sizes.
3.5
Work flow rate
Refers to the flow rate of the sampler under the working environment conditions, the gas production flow rate is kept constant, and the cutting characteristic of the cutter is guaranteed.
The working point flow of the sampler.
3.6
Standard state
Refers to the state when the temperature is 273 K and the pressure is 101.325 kPa. The pollutant concentration values in this standard are all standard.
Lower concentration.
3.7
Parallelism of monitors
Refers to the root mean square of each batch of data results.
3.8
Aerosol transport efficiency
Refers to the percentage of aerosol entering the filter that reaches the filter and the total amount of aerosol after passing through the cutter.
3.9
50% cut particle size (Da50) 50% cutpoint diameter
Refers to the aerodynamic equivalent diameter of the particle corresponding to the cutter's capture efficiency of 50%.
3.10
Geometric standard deviation of sigma
There are two ways to express the trapping efficiency of the cutter.
(1) The particle corresponding to the particle aerodynamic diameter Da16 and the capture efficiency of 50% when the capture efficiency is 16%
Ratio of sub-aerodynamic diameter Da50;
(2) The particle corresponding to the particle aerodynamic diameter Da50 and the capture efficiency of 84% when the capture efficiency is 50%
Ratio of sub-aerodynamic diameter Da84;
Both ratios should meet the requirements of σg = 1.5 ± 0.1 (PM10 sampler) and σg = 1.2 ± 0.1 (PM2.5 sampler).
4 sampler composition
The sampler consists of a sampling inlet, PM10 or PM2.5 cutter, filter clamp, connecting rod, flow measurement and control device, pumping
Air pump and other components.
The PM10 and PM2.5 samplers control the pump with constant flow (operating point flow) through flow measurement and control devices.
Taking an ambient air sample, the ambient air sample passes through the sampler inlet, PM10 or PM2.5 cutter at a constant flow rate.
PM10 or PM2.5 particles are trapped on the membrane, and the gas is discharged from the exhaust port through a flow meter and an air pump. Sampler real-time measurement
The flow rate before the flow meter, the temperature before the flow meter, the ambient atmospheric pressure, the ambient temperature and other parameters control the sampling flow.
The operating point flow of the PM10 or PM2.5 sampler is not required. The general situation is as follows.
The flow rate of the large flow sampler operating point is. 1.05 m3/min;
The flow rate of the medium flow sampler is. 100 L/min;
The flow rate of the small flow sampler operating point is 16.67 L/min.
5 Technical requirements
5.1 Appearance requirements
5.1.1 The sampler should have a product nameplate with the sampler name, model number, manufacturer name, factory number, and production date.
Period and other information.
5.1.2 The appearance of the sampler should be intact and there is no obvious damage on the surface, suitable for outdoor sampling. Each zero and component are connected reliably, each
The operation keys and buttons are flexible and effective.
5.2 Working conditions
Ambient temperature. (-30 ~ 50) ° C;
Atmospheric pressure. (80 ~ 106) kPa;
Supply voltage. AC (220 ± 22) V, (50 ± 1) Hz.
Note 1. Under special environmental conditions such as low temperature and low pressure, the configuration of instruments and equipment should meet the requirements of local environmental conditions.
5.3 Safety requirements
5.3.1 Insulation resistance
At ambient temperature (15 ~ 35) ° C, relative humidity ≤ 85%, the sampler power terminal to the ground or the chassis
The edge resistance is not less than 20MΩ.
5.3.2 Insulation strength
At ambient temperature (15 ~ 35) ° C, relative humidity ≤ 85%, the sampler is at 1500V (RMS), 50Hz
Under the sine wave test voltage for 1 min, there should be no breakdown or arcing.
5.4 Functional requirements
5.4.1 The sampler shall be constructed of corrosion-resistant materials and the surfaces of all dust-laden gas flow channels shall be free of static adsorption. Sampler
The air pump should use a brushless air pump.
5.4.2 In order to make the sampling of the sampler isotropic, the sampler inlet shall be circular or rectangular in the horizontal plane, non-circular or
The momentary sampler inlet should have at least four uniform inlet directions in the horizontal plane.
5.4.3 The sampler should have sampling time control and timing function, and can set the clock, sampling time and interval time.
5.4.4 The sampler should be able to automatically measure and display instantaneous flow, ambient atmospheric pressure, ambient temperature, temperature before flow meter, flow
The pressure before the meter shows that the update time does not exceed 5s. The sampler should be able to automatically calculate the cumulative case sampling at least every 1 minute.
Volume and standard sample volume. The sampler should be able to record and store instantaneous sample flow, ambient temperature, and environment at least every 5 minutes.
Parameters such as atmospheric pressure and cumulative standard volume are available for query, print, and output. The sampler should be able to store at least 3
Sample data for the month. The sampler should have a communication interface such as RS232 or USB.
5.4.5 When the flow measured by the sampler deviates from the specified operating point flow by more than ±10% and the duration exceeds 60
At the second, the sampler should stop pumping the air sample and stop the sampling time accumulation; the sampler should give an alarm to this situation.
Record and cumulative sampling time records are used to determine the validity of the collected sample.
5.4.6 When the sampler has a power failure during the working process, the sampler should stop sampling time accumulation and record the power failure.
Time; after re-powering, the sampler should be able to automatically resume the sampling function, and continue to accumulate the sampling time, while recording the call time,
After sampling, it should be able to display, print and output the power-off, call time and total sampling time of the sampling during the sampling process.
5.4.7 Sampler During the sampling process, the deviation between the temperature of the sampling filter and the ambient temperature should be controlled within ±5 °C.
5.4.8 The components of the sampler are tightly connected to avoid air leakage. See Appendix for the airtightness inspection method of PM10 and PM2.5 samplers.
A.
5.4.9 To reduce the effect of sampler venting on PM10 and PM2.5 measurements, the row of large and medium flow samplers venting downwards
The gas should be evenly distributed in the horizontal direction.
5.4.10 Filter membrane clamps shall be made of inert materials that have no effect on the measurement results, and the filter membranes shall be non-blocking and convenient for handling.
5.4.11 The mounting bracket of the sampler shall be able to firmly support the sampler, with mounting holes and fixing devices to fix the sampler
On the ground or sampling platform.
5.4.12 The sampler shall be provided with rain and snow protection.
5.4.13 Filter Requirements
The sampling filter may be an inorganic filter such as a glass fiber filter or a quartz filter or polyvinyl chloride, polypropylene or polytetrafluoroethylene.
An organic filter such as cellulose is mixed. The filter should be even and thin, without pinholes and burrs. PM10 filter for 0.3μm standard particles
The retention efficiency is ≥99%, and the retention efficiency of PM2.5 filter for 0.3 μm standard particles is ≥99.7%.
6 Performance indicators
6.1 PM10 sampler
6.1.1 Traffic Test
Under normal operating conditions of the sampler, the flow rate is measured at the sampling inlet using a standard flow meter and should meet the following criteria.
(1) Average flow deviation. ±5% set flow rate;
(2) Relative standard deviation of flow rate ≤ 2%;
(3) The average flow indication error is ≤ 2%.
6.1.2 Accumulated standard condition volume indication error
Accumulated standard volume volume indication error ± 5%.
6.1.3 Clock error
(1) Test 6h under normal working condition of the sampler, the clock error is ±20s.
(2) Disconnect the power supply of the sampler a total of 5 times (the duration of each power failure is 20s, 40s, 2min, 7min respectively)
And 20min, and should ensure no less than 10min of normal power supply between each power failure), test 6h, clock error
±2min.
6.1.4 Atmospheric pressure measurement indication error
In the range of (80 to 106) kPa, the atmospheric pressure measurement indication error is ≤ 1 kPa.
6.1.5 Temperature measurement indication error
In the range of (-30 ~ 50) °C, the temperature measurement indication error is ± 2 °C.
6.1.6 Noise
(1) Large flow sampler noise ≤ 67 dB(A);
(2) The medium flow sampler noise is ≤ 62 dB(A);
(3) Small flow sampler noise ≤ 62 dB(A).
6.1.7 Cutting performance
50% cutting particle size. Da50=(10±0.5)μm;
Geometric standard deviation of capture efficiency. σg = 1.5 ± 0.1.
6.1.8 Reference method comparison test
Use the reference method to perform at least 10 sets of valid data comparison tests, and the test results are subjected to linear regression analysis.
The following requirements.
Slope. 1 ± 0.1;
Intercept. (0 ± 5) μg/m3;
The correlation coefficient is ≥ 0.95.
6.1.9 Mean time between failures
The sampler has a mean time between failure (MTBF) ≥ 800h.
6.2 PM2.5 sampler
6.2.1 Traffic test
Under normal operating conditions of the sampler, the flow rate is measured at the sampling inlet using a standard flow meter and should meet the following criteria.
(1) Average flow deviation. ±5% set flow rate;
(2) Relative standard deviation of flow rate ≤ 2%;
(3) The average flow indication error is ≤ 2%.
6.2.2 Accumulated standard condition volume indication error
Accumulated standard volume volume indication error ± 5%.
6.2.3 Clock error
(1) Test 6h under normal working condition of the sampler, the clock error is ±20s.
(2) Disconnect the power supply of the sampler a total of 5 times (the duration of each power failure is 20s, 40s, 2min, 7min respectively)
And 20min, and should ensure no less than 10min of normal power supply between each power failure), test 6h, clock error
±2min.
6.2.4 Atmospheric pressure measurement indication error
In the range of (80 to 106) kPa, the atmospheric pressure measurement indication error is ≤ 1 kPa.
6.2.5 Temperature measurement indication error
In the range of (-30 ~ 50) °C, the temperature indication error is ± 2 °C.
6.2.6 Noise
(1) Large flow sampler noise ≤ 67 dB(A);
(2) The medium flow sampler noise is ≤ 62 dB(A);
(3) Small flow sampler noise ≤ 62dB (A).
6.2.7 Effects of changes in ambient air pressure, ambient temperature and supply voltage
The sampler is tested under different environmental conditions such as different air pressure, temperature and power supply voltage.
The standard shall comply with the requirements of 6.2.1.
6.2.8 Cutting performance
50% cutting particle size. Da50 = (2.5 ± 0.2) μm;
Geometric standard deviation of capture efficiency. σg = 1.2 ± 0.1.
6.2.9 Cutter Load Test
During a maintenance cycle, the cutter cutting performance index after loading meets the requirements of 6.2.8.
6.2.10 Reference method comparison test
Use the reference method to perform at least 23 sets of valid data comparison tests, and the test results are linear regression analysis.
The following requirements.
Slope. 1 ± 0.1;
Intercept. (0 ± 5) μg/m3;
The correlation coefficient is ≥ 0.93.
6.2.11 Mean time between failures
The sampler has a mean time between failure (MTBF) ≥ 800h.
7 Detection method
7.1 PM10 sampler
7.1.1 Flow measurement
Remove the sampling inlet and cutter and connect the air outlet of the standard flow meter to the sampler to be tested through the flow measurement adapter.
Air intake. Turn on the sample pump of the sampler to be tested and enter the flow detection interface. The flow rate of the sampler to be tested is stable and starts.
test. The test is carried out continuously for 6 hours, and the instantaneous flow rate of the standard flow meter and the sampler to be tested is recorded at least every 5 minutes.
condition). After the test is completed, the relevant indicators of the flow test are calculated according to formulas (3), (4), (5), (6), and (7). Test knot
Should meet the requirements of 6.1.1.
7.1.2 Accumulated standard volume indication error
Connect the cumulative flow meter to the sampler inlet to be tested to ensure no air leaks. Set the instrument to sample the working flow and start pumping
Pump, continuous operation (30 ± 5) min, stop sampling. Record the cumulative flow meter pre-temperature T1, pre-meter pressure P1, respectively
The cumulative volume QV, as well as the ambient atmospheric pressure Ba and the standard volume QV1 recorded by the sampler to be tested, are calculated according to formula (8).
The flowmeter standard volume QV2, calculate the cumulative standard volume indication error ΔQV according to formula (9), ΔQV should meet the requirements of 6.1.2.
7.1.3 Clock error
(1) Clock error under normal working conditions of the sampler
During the normal operation of the sampler to be tested, the reading and recording display time (hour-minute-second) is recorded as the start time t0, the same
When the stopwatch starts to start timing, when the 6h±60s is run, the sampler display time t1 and the stopwatch display are respectively read and recorded.
Between t2. Calculate the clock error according to equation (10). The test result Δt shall comply with the requirements of paragraph (1) of 6.1.3.
(2) Clock error under sampler power-off condition
During the normal operation of the sampler to be tested, the time of reading and recording the display (hour-minute-second) is recorded as the start time t0.
At the same time start the stopwatch to start timing. The total duration of the power-off condition test is 6h, during which a total of 5 power failures are required. each break
The duration of electricity is 20s, 40s, 2min, 7min and 20min respectively, and should be guaranteed between each power failure.
Normal power supply at 10 minutes. When running 6h±60s, read and record the sampler display time t1 and stopwatch display respectively.
Time t2. Calculate the clock error according to equation (10). The test result Δt shall comply with the requirements of paragraph (2) of 6.1.3.
7.1.4 Atmospheric pressure measurement indication error
Put the sampler to be tested into the air pressure chamber, and select the following 5 tests within the range of atmospheric pressure measurement (80-106) kPa.
Measuring point. 80kPa, 90kPa, 100kPa, 106kPa and current ambient pressure, the actual stability value of each detection point and the above regulations
The allowable deviation is ±0.5 kPa. After the pressure in the air pressure chamber is stabilized, the standard pressure value Bi and the sample to be tested are respectively read and recorded.
The pressure value Pi is displayed. Calculate the atmospheric pressure measurement indication error δPi of the sampler to be tested according to formula (11). Repeat the measurement 3 times,
The average value of each test point shall comply with the requirements of 6.1.4.
7.1.5 Temperature measurement indication error
Place the sampler to be tested into a constant temperature environment and set 4 temperature test points in the temperature range of (-30~50) °C.
(-20, 0, 20, 50) °C, the actual control temperature of the thermostat is allowed to deviate by ±2 °C from the above set temperature. Waiting for constant temperature
After the temperature of the device is stabilized, the standard temperature value tsi and the sampler display temperature value tpi to be tested are respectively read and recorded. According to formula (12)
Calculate the temperature measurement indication error Δti of the sampler to be tested. Repeat the measurement 3 times, the average value of each test point should meet the requirements of 6.1.5
Claim.
7.1.6 Noise
The sampler noise detection shall be carried out in accordance with the provisions of GB 3768, and the measured sound pressure level noise of the sampler A shall comply with the requirements of 6.1.6.
begging.
7.1.7 Cutting performance
The cutting performance test can use a shunt test method or a static box test method.
(1) Shunt test method
A single particle size, uniform, and stable aerosol particle is generated, and the aerosol concentration and the upstream of the cutter to be tested are respectively tested.
The aerosol concentration downstream of the cutter is used to calculate the capture efficiency of aerosols of different particle sizes; the relationship between the capture efficiency and the particle size is obtained.
The geometric standard deviation of the cutter's 50% cut particle size and capture efficiency.
a) Aerosol generation
Monodisperse solid aerosol particles are produced by a monodisperse solid aerosol generator. Using aerosol testing equipment (example
The particle size and concentration of the monodisperse solid aerosol are measured, for example, by an aerosol particle size spectrometer. The particle size requirements of the experimental particles are shown in Table 1.
Table 1 Particle size requirements of PM10 experimental particles
Aerodynamic equivalent diameter Da (μm) of experimental particles
3±0.5 5±0.5 7±0.5 9±0.5 11±1.0 13±1.0 15±1.0 17±1.0
b) shunt test
1) Remove the air intake unit from the cutter to be tested, connect the flow adapter, the cutter to be tested and the aerosol test through the shunt tube
For measuring instruments, the cutter should be placed vertically.
2) Using a monodisperse solid aerosol generator, the aerodynamic equivalent diameter (3 ± 0.5) μm of the mist in Table 1 occurs.
Monodisperse solid aerosol particles.
3) The particle size of the monodisperse solid aerosol is measured by an aerosol detecting instrument to confirm that it is stable and uniform, and meets the requirements.
4) The aerosol concentration on the upstream and downstream of the cutter is measured by an aerosol detecting instrument. Recorded as C111 and C211.
5) The atomized monodisperse solid aerosol particles of the eight particle sizes listed in Table 1 were sequentially produced. Repeat the above 3)~
4) The operation is completed until the atomized monodisperse solid aerosol particles of 8 particle sizes are tested to obtain C1ij and C2ij.
6) Repeat the operation of 5) three times, and calculate the data of 8 sets of 24 capture efficiencies according to formula (13).
c) data processing
The average of the eight capture efficiencies obtained is matched with the corresponding aerosol aerodynamic particle size to obtain the capture efficiency.
Regression equations and curves between aerosol aerodynamic particle sizes. Through the regression curve, the cutter capture efficiency is
Corresponding aerodynamic equivalent diameters Da16, Da50, Da84 at 16%, 50%, and 84%, according to formulas (1) and (2)
The geometric standard deviations σg, Da50 and σg of the cutter trapping efficiency should meet the requirements of 6.1.7.
(2) Static box test method
The cutter to be tested is installed in a static box, and a single particle size, uniform and stable aerosol particle occurs in the static box.
Aerosol concentration and uniformity were measured with an aerosol tester; the aerosol concentration in the tank was stabilized and evenly distributed. Use gas
The sol detecting instrument measures the aerosol concentration after cutting by the cutter to be tested. Calculate the capture efficiency of particles of different particle sizes,
The relationship between the collection efficiency and the particle size results in a geometric standard deviation of the cutter's 50% cut size and capture efficiency.
a) Install the cutter to be tested
Install at least one cutter to be tested into the static box to ensure that the cabinet is closed.
b) aerosol generation
Monodisperse solid aerosol particles are produced by a monodisperse solid aerosol generator. Using aerosol testing equipment (example
The particle size and concentration of the monodisperse solid aerosol are measured, for example, by an aerosol particle size spectrometer. The particle size requirements of the experimental particles are shown in Table 1.
c) static box test
1) The resulting aerodynamic equivalent diameter (3 ± 0.5) μm of atomized monodisperse solid aerosol particles are passed into the static
The tank is thoroughly mixed, and the aerosol sample is used to measure the particle size and concentration of the aerosol sample extracted from more than three points in the static tank.
To ensure uniform aerosol concentration in the static tank. The relative standard deviation of the aerosol concentrat...
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