This European Standard describes a standard method for determining the PM10 or PM2,5 mass concentrations of suspendedparticulate matter in ambient air by sampling the particulate matter on filters and weighing them by means of a balance. Measurements are performed with samplers with inlet designs as specified in Annex A, operating at a nominal flow rate of 2,3 m3\/h,over a nominal sampling period of 24 h. Measurement results are expressed in \u03bcg\/m3, where the volume of air is the volume atambient conditions near the inlet at the time of sampling. The range of application of this European Standard is for 24 h measurements from approximately 1 \u03bcg\/m3 (i.e. the limit of detection ofthe standard measurement method expressed as its uncertainty) up to 150 \u03bcg\/m3 for PM10 and 120 \u03bcg\/m3 for PM2,5. This European Standard describes procedures and gives requirements for the testing and use of so-called sequential samplers,equipped with a filter changer, suitable for extended stand-alone operation. Sequential samplers are commonly used throughout theEuropean Union for the measurement of concentrations in ambient air of PM10 or PM2,5. However, this European Standard does notexclude the use of single-filter samplers. This European Standard represents an evolution of earlier European Standards (EN 12341:1998 and 2014, EN 14907:2005). Newequipment procured shall comply fully with this European Standard. Older versions of these samplers, including those described in EN 12341:2014 Annex B, have a special status in terms of their use. These samplers can still be used for monitoring purposes and for ongoing quality control, provided that a well justified additionalallowance is made to their uncertainties This European Standard also provides guidance for the selection and testing of filters with the aim of reducing the measurementuncertainty of the results obtained when applying this European Standard.<\/p>\n
| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 2<\/td>\n | undefined <\/td>\n<\/tr>\n | ||||||
| 8<\/td>\n | 1 Scope 2 Normative references 3 Terms, definitions, symbols and abbreviations 3.1 Terms and definitions <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | 3.2 Symbols and abbreviations <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 4 Principle 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 5.1 Sampling system components and programme for type testing 5.1.1 General <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | 5.1.2 Sampler design 5.1.3 Standard inlet design <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | 5.1.4 Connecting pipe work 5.1.5 Filter holder and filter 5.1.5.1 Filter holder <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | 5.1.5.2 Filter 5.1.6 Flow control system <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | 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 5.1.10.1 General <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | 5.1.10.2 Low pressure method 5.1.10.3 Volumetric method <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | 5.1.11 Storage conditions 5.1.12 Recording of operational parameters <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | 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 <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | 5.2 Sampling system components and programme for type testing <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | 5.3 Field tests for type testing 5.3.1 General 5.3.2 Performance tests <\/td>\n<\/tr>\n | ||||||
| 28<\/td>\n | 5.4 Type testing report 6 Filter conditioning, sampling, weighing facilities and weighing procedures 6.1 General <\/td>\n<\/tr>\n | ||||||
| 30<\/td>\n | 6.2 Weighing Facilities 6.2.1 Weighing room 6.2.2 Balance 6.3 Filter conditioning and weighing prior to sampling <\/td>\n<\/tr>\n | ||||||
| 31<\/td>\n | 6.4 Sampling procedure 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 <\/td>\n<\/tr>\n | ||||||
| 32<\/td>\n | 6.6 Weighing room procedures 6.7 Filter blanks for ongoing quality control 6.7.1 General 6.7.2 Weighing room blanks <\/td>\n<\/tr>\n | ||||||
| 33<\/td>\n | 6.7.3 Field blanks 7 Ongoing quality control 7.1 General 7.2 Frequency of calibrations, checks and maintenance <\/td>\n<\/tr>\n | ||||||
| 34<\/td>\n | 7.3 Recording of operational parameters <\/td>\n<\/tr>\n | ||||||
| 35<\/td>\n | 7.4 Maintenance of the sampling system 7.5 Checks of sampler sensors 7.6 Calibration of sampler sensors <\/td>\n<\/tr>\n | ||||||
| 36<\/td>\n | 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 <\/td>\n<\/tr>\n | ||||||
| 37<\/td>\n | 7.13 Check of the accuracy of sampler clock 8 Expression of results 9 Performance characteristics of the method 9.1 General 9.2 GUM concept <\/td>\n<\/tr>\n | ||||||
| 39<\/td>\n | 9.3 Individual uncertainty sources 9.3.1 General 9.3.2 Collected particulate mass 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 <\/td>\n<\/tr>\n | ||||||
| 40<\/td>\n | 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 <\/td>\n<\/tr>\n | ||||||
| 41<\/td>\n | 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 (\u03c6a) <\/td>\n<\/tr>\n | ||||||
| 42<\/td>\n | 9.3.3 Time (t) 9.3.4 Uncertainty budget <\/td>\n<\/tr>\n | ||||||
| 44<\/td>\n | 9.4 Expanded uncertainty vs. EU Data Quality Objectives <\/td>\n<\/tr>\n | ||||||
| 45<\/td>\n | Annex A (normative)Design drawing of standard inlet for the sampling of PM10 and PM2,5 <\/td>\n<\/tr>\n | ||||||
| 46<\/td>\n | Annex B (informative)Scheme of PM standard sampler <\/td>\n<\/tr>\n | ||||||
| 47<\/td>\n | Annex C (informative)Suitability tests for filters C.1 Particle retention test C.2 Filter material integrity test C.3 Base mass reproducibility test C.4 Static charging test <\/td>\n<\/tr>\n | ||||||
| 48<\/td>\n | C.5 Water sorption test <\/td>\n<\/tr>\n | ||||||
| 49<\/td>\n | Annex D (normative)Initial suitability testing of weighing facilities 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 <\/td>\n<\/tr>\n | ||||||
| 50<\/td>\n | Annex E (informative)Results of experimental work <\/td>\n<\/tr>\n | ||||||
| 52<\/td>\n | Annex F (informative)Impactor efficiency <\/td>\n<\/tr>\n | ||||||
| 54<\/td>\n | Annex G (normative)Elements of type testing report <\/td>\n<\/tr>\n | ||||||
| 56<\/td>\n | Annex H (informative)Example for uncertainty budget calculation H.1 General H.2 Calculation using data from prescribed type testing <\/td>\n<\/tr>\n | ||||||
| 57<\/td>\n | H.3 Measurement uncertainty derived from ongoing field Quality Control <\/td>\n<\/tr>\n | ||||||
| 60<\/td>\n | Annex I (informative)Technical changes in EN 12341 with respect to version 2014 [21] <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Ambient air. Standard gravimetric measurement method for the determination of the PM10 or PM2,5 mass concentration of suspended particulate matter<\/b><\/p>\n |