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eLibrary > BS EN 12341:2023 - TC Tracked Changes. Ambient air. Standard gravimetric measurement method for the determination of the PM10 or PM2,5 mass concentration of suspended particulate matter >

BS EN 12341:2023 - TC Tracked Changes. Ambient air. Standard gravimetric measurement method for the determination of the PM10 or PM2,5 mass concentration of suspended particulate matter, 2023

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BS EN 12341:2023 - TC Tracked Changes. Ambient air. Standard gravimetric measurement method for the determination of the PM10 or PM2,5 mass concentration of suspended particulate matter, 2023

30478721
A-30443632 [Go to Page]
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1 Scope
2 Normative references
3 Terms, definitions, symbols and abbreviations [Go to Page]
3.1 Terms and definitions
3.2 Symbols and abbreviations
4 Principle [Go to Page]
4.1 Description of the standard measuring principle
4.2 Initial use and procedures for ongoing QA/QC
4.3 Evaluation of measurement uncertainty
5 Equipment, facilities and testing [Go to Page]
5.1 Sampling system components and programme for type testing [Go to Page]
5.1.1 General
5.1.2 Sampler design
5.1.3 Standard inlet design
5.1.4 Connecting pipe work
5.1.5 Filter holder and filter [Go to Page]
5.1.5.1 Filter holder
5.1.5.2 Filter
5.1.6 Flow control system
5.1.7 Temperature sensors
5.1.8 Ambient pressure sensor
5.1.9 Sampling period
5.1.10 Leak tightness of the sampling system [Go to Page]
5.1.10.1 General
5.1.10.2 Low pressure method
5.1.10.3 Volumetric method
5.1.11 Storage conditions
5.1.12 Recording of operational parameters
5.1.13 Effect of failure of mains power
5.1.14 Effect of ending sampling early due to filter clogging
5.1.15 Firmware, software and manual versions
5.2 Sampling system components and programme for type testing
5.3 Field tests for type testing [Go to Page]
5.3.1 General
5.3.2 Performance tests
5.4 Type testing report
6 Filter conditioning, sampling, weighing facilities and weighing procedures [Go to Page]
6.1 General
6.2 Weighing Facilities [Go to Page]
6.2.1 Weighing room
6.2.2 Balance
6.3 Filter conditioning and weighing prior to sampling
6.4 Sampling procedure [Go to Page]
6.4.1 Filter cassette loading
6.4.2 Filter sampling
6.4.3 Sample storage and transport procedures
6.5 Filter conditioning and weighing after sampling
6.6 Weighing room procedures
6.7 Filter blanks for ongoing quality control [Go to Page]
6.7.1 General
6.7.2 Weighing room blanks
6.7.3 Field blanks
7 Ongoing quality control [Go to Page]
7.1 General
7.2 Frequency of calibrations, checks and maintenance
7.3 Recording of operational parameters
7.4 Maintenance of the sampling system
7.5 Checks of sampler sensors
7.6 Calibration of sampler sensors
7.7 Checks of the sampler flow rate
7.8 Calibration of the sampler flow rate
7.9 Leak check of the sampling system
7.10 Checks of weighing facility sensors
7.11 Calibration of weighing facility sensors
7.12 Balance
7.13 Check of the accuracy of sampler clock
8 Expression of results
9 Performance characteristics of the method [Go to Page]
9.1 General
9.2 GUM concept
9.3 Individual uncertainty sources [Go to Page]
9.3.1 General
9.3.2 Collected particulate mass [Go to Page]
9.3.2.1 Deviation of size selection performance from designated characteristic
9.3.2.2 Deposition losses in the connecting pipe work
9.3.2.3 Filter collection efficiency
9.3.2.4 Loss of semi-volatile particulate matter between collection and weighing
9.3.2.5 Change in filter mass due to water content
9.3.2.6 Variation in mass of particulate matter due to water content
9.3.2.7 Changes in buoyancy effects between the unsampled and sampled weighings
9.3.2.8 Balance uncertainty, span and zero drift
9.3.2.9 Effects of static electrical forces during weighing
9.3.2.10 Contamination or loss of filter material between unsampled and sampled weighings
9.3.2.11 Artefacts due to interactions between the filter material and gases
9.3.2.12 Flow rate (φa)
9.3.3 Time (t)
9.3.4 Uncertainty budget
9.4 Expanded uncertainty vs. EU Data Quality Objectives
Annex A (normative)Design drawing of standard inlet for the sampling of PM10 and PM2,5
Annex B (informative)Scheme of PM standard sampler
Annex C (informative)Suitability tests for filters [Go to Page]
C.1 Particle retention test
C.2 Filter material integrity test
C.3 Base mass reproducibility test
C.4 Static charging test
C.5 Water sorption test
Annex D (normative)Initial suitability testing of weighing facilities [Go to Page]
D.1 Accuracy and stability of temperature and relative humidity
D.2 Accuracy and stability of balance
D.3 Accuracy and precision of the weighing procedure
Annex E (informative)Results of experimental work
Annex F (informative)Impactor efficiency
Annex G (normative)Elements of type testing report
Annex H (informative)Example for uncertainty budget calculation [Go to Page]
H.1 General
H.2 Calculation using data from prescribed type testing
H.3 Measurement uncertainty derived from ongoing field Quality Control
Annex I (informative)Technical changes in EN 12341 with respect to version 2014 [21] [Go to Page]

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BS EN 12341:2023 - TC Tracked Changes. Ambient air. Standard gravimetric measurement method for the determination of the PM10 or PM2,5 mass concentration of suspended particulate matter, 2023

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