EN 12341:2014
(Main)Ambient air - Standard gravimetric measurement method for the determination of the PM10 or PM2,5 mass concentration of suspended particulate matter
Ambient air - Standard gravimetric measurement method for the determination of the PM10 or PM2,5 mass concentration of suspended particulate matter
This European Standard describes a standard method for determining the PM10 or PM2,5 mass concentrations of suspended particulate 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 µg/m3, where the volume of air is the volume at ambient conditions near the inlet at the time of sampling.
The range of application of this European Standard is from approximately 1 µg/m3 (i.e. the limit of detection of the standard measurement method expressed as its uncertainty) up to 150 µg/m3 for PM10 and 120 µg/m3 for PM2,5.
NOTE 1 Although the European Standard is not validated for higher concentrations, its range of application could well be extended to ambient air concentrations up to circa 200 µg/m3 when using suitable filter materials (see 5.1.4).
This European Standard describes procedures and gives requirements for the use of so-called sequential samplers, equipped with a filter changer, suitable for extended stand-alone operation. Sequential samplers are commonly used throughout the European Union for the measurement of concentrations in ambient air of PM10 or PM2,5. However, this European Standard does not exclude the use of single-filter samplers.
This European Standard does not give procedures for the demonstration of equivalence of other sampler types, e.g. equipped with a different aerosol classifier and/or operating at different flow rates. Such procedures and requirements are given in detail in the Guide to the Demonstration of Equivalence of Ambient Air Monitoring Methods [11] and for automated continuous PM monitors (see CEN/TS 16450:2013).
The present European Standard represents an evolution of earlier European Standards (EN 12341:1998 and EN 14907:2005) through the development of the 2,3 m3/h sampler to include constraints on the filter temperature during and after sampling and the ability to monitor temperatures at critical points in the sampling system. It is recommended that when equipment is procured it complies fully with the present European Standard. However, older versions of these 2,3 m3/h samplers that do not employ sheath air cooling, the ability to cool filters after sampling, or the ability to monitor temperatures at critical points in the sampling system have a special status in terms of their use as reference samplers. Historical results obtained using these samplers will remain valid. These samplers can still be used for monitoring purposes and for equivalence trials, provided that a well justified additional allowance is made to their uncertainties (see Annex B).
In addition, three specific sampling systems - the -long nozzle - 2,3 m3/h sampler and the 68 m3/h sampler for PM10 in EN 12341:1998, and the 30 m3/h PM2,5 inlet in EN 14907:2005 - also have a special status in terms of their use as reference samplers. Historical results obtained using these samplers will remain valid. These samplers can still be used for monitoring purposes and for equivalence trials, provided that a well-justified additional allowance is made to their uncertainties (see Annex B).
Other sampling systems, as described in Annex B of this European Standard, can be used provided that a well justified additional allowance is made to their uncertainties as derived from equivalence tests.
NOTE 2 By evaluating existing data it has been shown that these samplers give results for PM10 and PM2,5 that are equivalent to those obtained by application of this European Standard. Results are shown in Annex B.
This European Standard also provides guidance for the selection and testing of filters with the aim of reducing the measurement uncertainty of the results obtained when applying this European Standard.
Außenluft - Gravimetrisches Standardmessverfahren für die Bestimmung der PM10- oder PM2,5-Massenkonzentration des Schwebstaubes
Diese Europäische Norm beschreibt ein Standardmessverfahren zur Bestimmung der PM10- oder PM2,5-Massenkonzentration von Schwebstaub in der Außenluft durch Probenahme des Staubes auf Filtern und Wägung der Filter mit Hilfe einer Waage.
Die Messungen werden mit Probenahmegeräten mit Probeneinlässen durchgeführt, deren Ausführung den Festlegungen in Anhang A entspricht, und die mit einem Nennvolumenstrom von 2,3 m3/h über eine Nenn-probenahmedauer von 24 h betrieben werden. Die Messergebnisse werden in μg/m3 angegeben, wobei das Luftvolumen das Volumen bei Umgebungsbedingungen in der Nähe des Probeneinlasses zum Zeitpunkt der Probenahme darstellt.
Der Anwendungsbereich dieser Europäischen Norm reicht von etwa 1 μg/m3 (d. h. der Nachweisgrenze des Standardmessverfahrens, ausgedrückt als deren Unsicherheit) bis zu 150 μg/m3 bei PM10 und 120 μg/m3 bei PM2,5.
ANMERKUNG 1 Obwohl diese Europäische Norm nicht für höhere Konzentrationen validiert ist, kann der Anwendungs¬bereich bei Verwendung von geeigneten Filtermaterialien ohne Bedenken auf Konzentrationen in der Luft von bis zu etwa 200 μg/m3 erweitert werden (siehe 5.1.4).
Diese Europäische Norm beschreibt Verfahren für und legt Anforderungen an die Anwendung sogenannter sequentieller Probenahmeeinrichtungen fest, die mit einem Filterwechsler ausgestattet und für einen längeren autonomen Betrieb geeignet sind. Automatische Filterwechsler werden üblicherweise in der gesamten Europäischen Union zur Messung von Konzentrationen von PM10 oder PM2,5 in Luft eingesetzt. Diese Europäische Norm schließt den Einsatz von Einzelfiltergeräten jedoch nicht aus.
In dieser Europäischen Norm sind keine Verfahren zum Nachweis der Gleichwertigkeit anderer Typen von Probenahmeeinrichtungen, die z. B. mit einem anderen Aerosolklassierer ausgestattet sind und/oder bei anderen Volumenströmen betrieben werden, angeführt. Derartige Verfahren und Anforderungen sind ausführlich im Leitfaden zum Nachweis der Gleichwertigkeit von Immissionsmessverfahren [11] und für automatische PM-Monitore in CEN/TS 16450:2013 angeführt.
Diese Europäische Norm stellt eine Weiterentwicklung früherer Europäischer Normen (EN 12341:1998 und EN 14907:2005) durch die Entwicklung des Probenahmegeräts für 2,3 m3/h zur Einbeziehung von Anforderungen an die Filtertemperatur während und nach der Sammlung und des Vermögens, die Temperaturen an kritischen Punkten im Probenahmesystem zu überwachen, dar. Es wird empfohlen, dass, wenn ein Gerät beschafft wird, dieses vollständig der vorliegenden Europäischen Norm entspricht. Ältere Versionen dieser Probenahmegeräte für 2,3 m3/h ohne Mantelluftkühlung, das Vermögen, die Filter nach der Probenahme zu kühlen, oder das Vermögen, Temperaturen an kritischen Punkten im Probenahmesystem zu überwachen haben jedoch einen besonderen Status hinsichtlich ihrer Anwendung als Referenzgeräte. Die in früheren Prüfungen unter Anwendung dieser Probenahmegeräte erhaltenen Ergebnisse behalten ihre Gültigkeit bei. Diese Probenahmegeräte können nach wie vor für Überwachungszwecke und Versuche zur Gleichwertigkeit eingesetzt werden, vorausgesetzt, dass die Unsicherheiten durch eine gut begründete zusätzliche Toleranz ergänzt werden (siehe Anhang B).
Außerdem haben drei spezifische Probenahmeeinrichtungen — das Probenahmegerät für 2,3 m3/h mit „langer Düse“ und das Probenahmegerät für 68 m3/h für PM10 nach EN 12341:1998 sowie der Probeneinlass für 30 m3/h für PM2,5 nach EN 14907:2005 — ebenfalls einen besonderen Status hinsichtlich ihrer Anwendung als Referenzgeräte. Die in früheren Prüfungen unter Anwendung dieser Probenahmegeräte erhaltenen Ergebnisse behalten ihre Gültigkeit bei.
Air ambiant - Méthode normalisée de mesurage gravimétrique pour la détermination de la concentration massique MP10 ou MP2,5 de matière particulaire en suspension
La présente Norme européenne décrit une méthode normalisée de détermination des concentrations massiques de MP10 ou MP2,5 de la matière particulaire en suspension dans l’air ambiant en prélevant la matière particulaire sur les filtres et en les pesant à l’aide d’une balance.
Les mesurages sont effectués avec des préleveurs dont les têtes de prélèvement sont conçues conformément aux spécifications de l’Annexe A, fonctionnant à un débit nominal de 2,3 m3/h, sur une durée d’échantillonnage nominale de 24 h. Les résultats de mesure sont exprimés en µg/m3, le volume d’air étant le volume dans les conditions ambiantes à proximité de la tête de prélèvement au moment du prélèvement.
La gamme d’application de la présente Norme européenne se situe entre environ 1 μg/m3 (c’est-à-dire, la limite de détection de la méthode de mesure normalisée exprimée sous la forme de son incertitude) et 150 μg/m3 pour MP10 et 120 μg/m3 pour MP2,5.
NOTE 1 Bien que la présente Norme européenne ne soit pas validée pour des concentrations supérieures, sa gamme d’application peut parfaitement être élargie à des concentrations dans l’air ambiant pouvant atteindre environ 200 µg/m3 en cas d’utilisation de matériaux filtrants appropriés (voir en 5.1.4).
La présente Norme européenne décrit les modes opératoires et donne les exigences d’utilisation des préleveurs dits séquentiels, équipés d’un passeur de filtres, approprié à un fonctionnement autonome prolongé. Les préleveurs séquentiels sont couramment utilisés dans toute l’Union européenne pour mesurer les concentrations dans l’air ambiant de MP10 ou MP2,5. Toutefois, la présente Norme européenne n’exclut pas l’utilisation de préleveurs à filtre unique.
La présente Norme européenne ne donne pas de modes opératoires relatifs à la démonstration d’équivalence d’autres types de préleveurs, par exemple ceux équipés d’un classificateur d’aérosols différent et/ou ceux fonctionnant à différents débits. Ces modes opératoires et ces exigences sont détaillés dans le « Guide de Démonstration d’Equivalence des Méthodes de Mesure de la Qualité de l’Air Ambiant » [11] et pour les analyseurs automatiques de MP en continu (voir la CEN/TS 16450:2013).
La présente Norme européenne représente une évolution par rapport aux Normes européennes antérieures (EN 12341:1998 et EN 14907:2005) car le préleveur à 2,3 m3/h inclut désormais des contraintes concernant la température du filtre pendant et après le prélèvement et est capable de surveiller les températures à des points critiques dans le système de prélèvement. Il est recommandé que l’équipement acheté soit parfaitement conforme à la présente Norme européenne. Toutefois, des versions antérieures de ces préleveurs 2,3 m3/h n’utilisant pas le refroidissement par l’air de gaine, incapables de refroidir les filtres après prélèvement ou de surveiller les températures à des points critiques dans le système de prélèvement ont un statut spécial lorsqu’elles sont utilisées comme préleveurs de référence. Les résultats historiques obtenus avec ces préleveurs demeurent valides. Ces préleveurs peuvent toujours être utilisés pour la surveillance et pour les essais d’équivalence, à condition qu’une tolérance supplémentaire adéquatement justifiée soit appliquée à leurs incertitudes (voir l’Annexe B).
De plus, trois systèmes de prélèvement spécifiques, le préleveur à 2,3 m3/h « à injecteur long », le préleveur à 68 m3/h pour MP10 dans l’EN 12341:1998 et la tête de prélèvement à 30 m3/h pour MP2,5 dans l’EN 14907:2005, ont également un statut spécial lorsqu’ils sont utilisés comme préleveurs de référence. Les résultats historiques obtenus avec ces préleveurs demeurent valides.
Zunanji zrak - Standardna gravimetrijska metoda za določevanje masne koncentracije frakcije lebdečih delcev PM10 ali PM2,5
EN 12341 opisuje standardno gravimetrijsko metodo za določevanje masne koncentracije frakcije lebdečih delcev PM10 ali PM2,5 v zunanjem zraku z vzorčenjem snovi v filtrih in tehtanjem z uravnoteženjem. Merjenje se izvede z vzorčniki z dovodnimi oblikami, navedenimi v Dodatku A, ki delujejo pri nazivnem pretoku 2,3 m3/h, v nazivnem obdobju vzorčenja 24 ur. Meritve so izražene v μg/m3, kjer je prostornina zraka enaki prostornini pri okoljskih pogojih poleg dovoda v času vzorčenja. Razpon uporabe tega evropskega standarda je od približno 1 μg/m3 (tj. omejitev zaznavanja standardne merilne metode, izražene kot negotove) do 150 μg/m3 za PM10 in 120 μg/m3 za PM2,5. Ta evropski standard opisuje postopke in podaja zahteve za uporabo tako imenovanih sekvenčnih vzorčnikov, opremljenih z menjalom filtra, primernim za samostojno uporabo. Sekvenčni vzorčniki se uporabljajo po vsej Evropski uniji za merjenje koncentracij PM10 ali PM2,5 v zunanjem zraku. Vendar pa ta evropski standard ne izključuje uporabe vzorčnikov z enim filtrom.
General Information
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Frequently Asked Questions
EN 12341:2014 is a standard published by the European Committee for Standardization (CEN). Its full title is "Ambient air - Standard gravimetric measurement method for the determination of the PM10 or PM2,5 mass concentration of suspended particulate matter". This standard covers: This European Standard describes a standard method for determining the PM10 or PM2,5 mass concentrations of suspended particulate 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 µg/m3, where the volume of air is the volume at ambient conditions near the inlet at the time of sampling. The range of application of this European Standard is from approximately 1 µg/m3 (i.e. the limit of detection of the standard measurement method expressed as its uncertainty) up to 150 µg/m3 for PM10 and 120 µg/m3 for PM2,5. NOTE 1 Although the European Standard is not validated for higher concentrations, its range of application could well be extended to ambient air concentrations up to circa 200 µg/m3 when using suitable filter materials (see 5.1.4). This European Standard describes procedures and gives requirements for the use of so-called sequential samplers, equipped with a filter changer, suitable for extended stand-alone operation. Sequential samplers are commonly used throughout the European Union for the measurement of concentrations in ambient air of PM10 or PM2,5. However, this European Standard does not exclude the use of single-filter samplers. This European Standard does not give procedures for the demonstration of equivalence of other sampler types, e.g. equipped with a different aerosol classifier and/or operating at different flow rates. Such procedures and requirements are given in detail in the Guide to the Demonstration of Equivalence of Ambient Air Monitoring Methods [11] and for automated continuous PM monitors (see CEN/TS 16450:2013). The present European Standard represents an evolution of earlier European Standards (EN 12341:1998 and EN 14907:2005) through the development of the 2,3 m3/h sampler to include constraints on the filter temperature during and after sampling and the ability to monitor temperatures at critical points in the sampling system. It is recommended that when equipment is procured it complies fully with the present European Standard. However, older versions of these 2,3 m3/h samplers that do not employ sheath air cooling, the ability to cool filters after sampling, or the ability to monitor temperatures at critical points in the sampling system have a special status in terms of their use as reference samplers. Historical results obtained using these samplers will remain valid. These samplers can still be used for monitoring purposes and for equivalence trials, provided that a well justified additional allowance is made to their uncertainties (see Annex B). In addition, three specific sampling systems - the -long nozzle - 2,3 m3/h sampler and the 68 m3/h sampler for PM10 in EN 12341:1998, and the 30 m3/h PM2,5 inlet in EN 14907:2005 - also have a special status in terms of their use as reference samplers. Historical results obtained using these samplers will remain valid. These samplers can still be used for monitoring purposes and for equivalence trials, provided that a well-justified additional allowance is made to their uncertainties (see Annex B). Other sampling systems, as described in Annex B of this European Standard, can be used provided that a well justified additional allowance is made to their uncertainties as derived from equivalence tests. NOTE 2 By evaluating existing data it has been shown that these samplers give results for PM10 and PM2,5 that are equivalent to those obtained by application of this European Standard. Results are shown in Annex B. This European Standard also provides guidance for the selection and testing of filters with the aim of reducing the measurement uncertainty of the results obtained when applying this European Standard.
This European Standard describes a standard method for determining the PM10 or PM2,5 mass concentrations of suspended particulate 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 µg/m3, where the volume of air is the volume at ambient conditions near the inlet at the time of sampling. The range of application of this European Standard is from approximately 1 µg/m3 (i.e. the limit of detection of the standard measurement method expressed as its uncertainty) up to 150 µg/m3 for PM10 and 120 µg/m3 for PM2,5. NOTE 1 Although the European Standard is not validated for higher concentrations, its range of application could well be extended to ambient air concentrations up to circa 200 µg/m3 when using suitable filter materials (see 5.1.4). This European Standard describes procedures and gives requirements for the use of so-called sequential samplers, equipped with a filter changer, suitable for extended stand-alone operation. Sequential samplers are commonly used throughout the European Union for the measurement of concentrations in ambient air of PM10 or PM2,5. However, this European Standard does not exclude the use of single-filter samplers. This European Standard does not give procedures for the demonstration of equivalence of other sampler types, e.g. equipped with a different aerosol classifier and/or operating at different flow rates. Such procedures and requirements are given in detail in the Guide to the Demonstration of Equivalence of Ambient Air Monitoring Methods [11] and for automated continuous PM monitors (see CEN/TS 16450:2013). The present European Standard represents an evolution of earlier European Standards (EN 12341:1998 and EN 14907:2005) through the development of the 2,3 m3/h sampler to include constraints on the filter temperature during and after sampling and the ability to monitor temperatures at critical points in the sampling system. It is recommended that when equipment is procured it complies fully with the present European Standard. However, older versions of these 2,3 m3/h samplers that do not employ sheath air cooling, the ability to cool filters after sampling, or the ability to monitor temperatures at critical points in the sampling system have a special status in terms of their use as reference samplers. Historical results obtained using these samplers will remain valid. These samplers can still be used for monitoring purposes and for equivalence trials, provided that a well justified additional allowance is made to their uncertainties (see Annex B). In addition, three specific sampling systems - the -long nozzle - 2,3 m3/h sampler and the 68 m3/h sampler for PM10 in EN 12341:1998, and the 30 m3/h PM2,5 inlet in EN 14907:2005 - also have a special status in terms of their use as reference samplers. Historical results obtained using these samplers will remain valid. These samplers can still be used for monitoring purposes and for equivalence trials, provided that a well-justified additional allowance is made to their uncertainties (see Annex B). Other sampling systems, as described in Annex B of this European Standard, can be used provided that a well justified additional allowance is made to their uncertainties as derived from equivalence tests. NOTE 2 By evaluating existing data it has been shown that these samplers give results for PM10 and PM2,5 that are equivalent to those obtained by application of this European Standard. Results are shown in Annex B. This European Standard also provides guidance for the selection and testing of filters with the aim of reducing the measurement uncertainty of the results obtained when applying this European Standard.
EN 12341:2014 is classified under the following ICS (International Classification for Standards) categories: 13.040.20 - Ambient atmospheres; 61.040 - Headgear. Clothing accessories. Fastening of clothing. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 12341:2014 has the following relationships with other standards: It is inter standard links to EN 12341:1998, EN 14907:2005, EN 12341:2023. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 12341:2014 is associated with the following European legislation: EU Directives/Regulations: 1999/30/EC, 2008/50/EC, 96/62/EC; Standardization Mandates: M/003, M/286, M/503, M/EXP. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.VQHAußenluft - Gravimetrisches Standardmessverfahren für die Bestimmung der PM10- oder PM2,5-Massenkonzentration des SchwebstaubesAir ambiant - Méthode normalisée de mesurage gravimétrique pour la détermination de la concentration massique MP10 ou MP2,5 de matière particulaire en suspensionAmbient air - Standard gravimetric measurement method for the determination of the PM10 or PM2,5 mass concentration of suspended particulate matter13.040.20Kakovost okoljskega zrakaAmbient atmospheresICS:Ta slovenski standard je istoveten z:EN 12341:2014SIST EN 12341:2014en,fr,de01-julij-2014SIST EN 12341:2014SLOVENSKI
STANDARDSIST EN 14907:2005SIST EN 12341:20001DGRPHãþD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12341
May 2014 ICS 13.040.20 Supersedes EN 12341:1998, EN 14907:2005
English Version
Ambient air - Standard gravimetric measurement method for the determination of the PM10 or PM2,5 mass concentration of suspended particulate matter
Air ambiant - Méthode normalisée de mesurage gravimétrique pour la détermination de la concentration massique MP10 ou MP2,5 de matière particulaire en suspension
Außenluft - Gravimetrisches Standardmessverfahren für die Bestimmung der PM10- oder PM2,5-Massenkonzentration des Schwebstaubes This European Standard was approved by CEN on 10 April 2014.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12341:2014 E SIST EN 12341:2014
Page
Foreword .4
Introduction .5 1 Scope .7 2 Normative references .8 3 Terms, definitions, symbols and abbreviations .8 3.1 Terms and definitions .8 3.2 Symbols and abbreviations . 10 4 Principle . 12 4.1 Description of the standard measuring principle . 12 4.2 Initial use and procedures for ongoing QA/QC . 12 5 Equipment and facilities . 13 5.1 Sampling system components . 13 5.1.1 General . 13 5.1.2 Standard inlet design . 14 5.1.3 Connecting pipe work . 15 5.1.4 Filter holder and filter . 15 5.1.5 Flow control system . 16 5.1.6 Sampling period . 16 5.1.7 Leak tightness of the sampling system. 16 5.1.8 Storage conditions . 17 5.2 Weighing facilities . 17 5.2.1 General . 17 5.2.2 Weighing room . 18 5.2.3 Balance . 18 6 Filter conditioning, sampling and weighing procedures . 19 6.1 General . 19 6.2 Filter conditioning and weighing prior to sampling . 19 6.3 Sampling procedure . 20 6.3.1 Filter cassette loading . 20 6.3.2 Filter sampling . 20 6.3.3 Sample storage and transport procedures . 20 6.4 Filter conditioning and weighing after sampling . 20 6.5 Weighing room procedures . 21 6.6 Filter blanks for ongoing quality control . 21 6.6.1 General . 21 6.6.2 Weighing room blanks . 21 6.6.3 Field blanks . 22 7 Ongoing quality control . 22 7.1 General . 22 7.2 Frequency of calibrations, checks and maintenance . 22 7.3 Maintenance of the sampling system . 23 7.4 Checks of sampler sensors . 23 7.5 Calibration of sampler sensors . 24 7.6 Checks of the sampler flow rate . 24 7.7 Calibration of the sampler flow rate. 24 7.8 Leak check of the sampling system . 24 7.9 Checks of weighing room sensors . 24 7.10 Calibration of weighing room sensors . 25 7.11 Balance . 25 SIST EN 12341:2014
Design drawing of standard inlet for the sampling of PM10 and PM2,5 . 34 Annex B (normative)
Other samplers . 35 Annex C (informative)
Scheme of PM standard sampler . 44 Annex D (informative)
Suitability tests for filters. 45 Annex E (normative)
Initial suitability testing of weighing facilities . 47 Annex F (informative)
Results of experimental work . 48 Annex G (informative)
Impactor efficiency . 50 Bibliography . 52
— EU European Union — GDE Guide to the Demonstration of Equivalence of Ambient Air Monitoring Methods — GUM Guide to the Expression of Uncertainty in Measurement — JCGM Joint Committee for Guides in Metrology — PM Particulate Matter — POM Polyoxymethylene — PTFE Polytetrafluoroethylene — QA/QC Quality Assurance / Quality Control — RH Relative Humidity — RM Reference Method(ology) SIST EN 12341:2014
Design/performance characteristic Requirement a Subclause 1 Sampler design The sampler shall be designed in a way that it is possible to check and calibrate all sensors important to ensure the correct performance of the sampler. The manual of the sampler shall contain instructions on how to access the sensors.
2 Inlet design As prescribed 5.1.2 3 Temperature of filter during sampling Within 5 °C of ambient temperature for ambient temperatures ≥ 20 °C 5.1.4 4 Nominal flow rate 2,3 m3/h at ambient conditions 5.1.5 5 Constancy of sample volumetric flow ≤ 2,0 % sampling time (averaged flow) ≤ 5,0 % rated flow (instantaneous flow) 5.1.5 6 Leak tightness of the sampling system 3L ≤ 1,0 % of sample flow rate 5.1.7 7 Single-filter sampling period 24 h ± 1 h 5.1.6 8 Uncertainty (95 % confidence) of sampling ≤ 5 min 5.1.6 SIST EN 12341:2014
12 Temperature of storage of sampled filters in the instrument Shall not induce additional losses of semi-volatile constituents of PM 5.1.8; 6.3.3 13 Recording of operational parameters Measuring systems based on sequential samplers shall be able to transmit operational states by status signals of – at minimum – the following parameters: – flow rate (instantaneous and average) – pressure drop across the filter, if necessary – sampling time and sample volume – air temperature in filter section – temperature of filter storage.
14 Effect of failure of mains voltage Instrument parameters shall be secured against loss. On return of mains voltage the instrument shall automatically resume functioning.
15 Effect of abortion of sampling due to high pressure drop over the filter Instruments with filter changers shall have the ability to restart automatically with a new filter if the previous filter sample was aborted due to a high pressure drop across the filter.
a The ranges given for the parameters need not to be reduced for the calibration uncertainties of the sensors used for their control.
5.1.2 Standard inlet design A standard drawing of the inlet design for the sampling of PM10 and PM2,5 is given in Annex A. The inlet shall be made of an inert, non-corroding, electrically conducting material such as stainless steel or anodized aluminium or aluminium alloy. SIST EN 12341:2014
The filters shall be made of glass fibre, quartz fibre, PTFE or PTFE coated glass fibre. The suitability of specific types and brands of filters may depend on: — (variations in) the filter composition, e.g. (variations in) the fraction of binder used; — the integrity of the filter at filter handling; — the maximum pressure drop over the filter at which the flow rate can be maintained at its nominal level; — the period(s) and relative humidity(ies) used for filter conditioning before sampling. SIST EN 12341:2014
is pressure difference determined for the time interval ∆t; P0
is pressure at time t0; Vsys
is estimated total volume of the system (dead volume) ; ∆t
is time interval needed for the pressure rise.
The maximum of the three leak rates determined shall be calculated. The complete sampling system shall be checked for tightness. 5.1.7.3 Volumetric method Compared to the low-pressure method, this method gives rise to higher uncertainties. Consequently, its use should be restricted to exceptional cases. Only if it is technically impossible to measure the low pressure, the leak rate can be determined by measuring flow rates at the inlet and outlet of the flow path. 5.1.8 Storage conditions Users of this European Standard shall carefully consider and implement suitable temperature conditions for storage of sampled filters, such that loss of volatile and semi-volatile materials is minimized over the storage period. Storage conditions shall also
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본 기사는 유럽 표준 EN 12341:2014에 대해 논의한다. 이 표준은 대기 중에 있는 PM10 또는 PM2.5 입자 물질의 질량 농도를 결정하기 위한 표준 방법을 제시한다. 이 방법은 필터에 입자 물질을 샘플링하고 저울을 사용하여 이를 측정하는 것이다. 측정은 2.3 m3/h의 유량으로 24시간 동안 수행된다. 결과는 µg/m3 단위로 표시된다. 이 표준의 적용 범위는 약 1 µg/m3부터 PM10의 경우 150 µg/m3, PM2.5의 경우 120 µg/m3까지이다. 이 기사는 또한 단일 필터 샘플러의 사용을 배제하지 않으며 필터의 선택과 테스트에 대한 지침을 제공하여 측정의 불확실성을 줄일 수 있다고 언급한다.
The article discusses the European Standard EN 12341:2014, which provides a method for determining the mass concentrations of PM10 or PM2.5 particulate matter in ambient air. The method involves sampling the particulate matter on filters and weighing them using a balance. The measurements are performed with samplers operating at a flow rate of 2.3 m3/h over a 24-hour period. The results are expressed in µg/m3. The range of application of the standard is from approximately 1 µg/m3 to 150 µg/m3 for PM10, and 120 µg/m3 for PM2.5. The article also mentions that the standard does not exclude the use of single-filter samplers and provides guidance on the selection and testing of filters to reduce measurement uncertainty.
この記事では、欧州規格EN 12341:2014について説明しています。この規格は、大気中の浮遊微粒子のPM10またはPM2.5質量濃度を決定するための基準方法を説明しています。この方法では、微粒子をフィルターにサンプリングし、天秤を使用して重量を測定します。測定は2.3 m3/hの流量で24時間行われます。結果はµg/m3で表されます。この規格の適用範囲は、PM10の場合は約1 µg/m3から150 µg/m3、PM2.5の場合は120 µg/m3までです。また、この規格は単一フィルターサンプラーの使用を排除しておらず、フィルターの選択とテストに関する指針を提供し、測定の不確かさを減らすことができます。
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