Workplace exposure - Assessment of sampler performance for measurement of airborne particle concentrations - Part 2: Laboratory performance test based on determination of sampling efficiency

This European Standard specifies a laboratory performance test for samplers for the inhalable, thoracic and respirable aerosol fractions, based on determining the sampling efficiency curve of a candidate sampler at a minimum of nine particle sizes. It specifies methods for testing aerosol samplers under prescribed laboratory conditions in order to test whether the performance of a candidate sampler fulfils the requirements of EN 13205 1:2014.
This part of EN 13205 is applicable to all samplers used for the health-related sampling of particles in workplace air.

Exposition am Arbeitsplatz - Beurteilung der Leistungsfähigkeit von Sammlern für die Messung der Konzentration luftgetragener Partikel - Teil 2: Laborprüfung der Leistungsfähigkeit basierend auf der Bestimmung des Probenahmewirkungsgrads

Diese Europäische Norm legt eine Laborprüfung der Leistungsfähigkeit von Sammlern für die einatembare, thorakale und alveolengängige Fraktion von Aerosolen auf der Grundlage der Bestimmung der Kurve des Probenahmewirkungsgrads eines zu prüfenden Sammlers bei mindestens neun Partikelgrößen fest. Es werden Verfahren zur Prüfung von Aerosolsammlern unter vorgeschriebenen Laborbedingungen festgelegt, um zu prüfen, ob die Leistungsfähigkeit eines zu prüfenden Sammlers die Anforderungen nach EN 13205-1:2014 erfüllt.
Dieser Teil von EN 13205 gilt für alle Sammler, die für die gesundheitsbezogene Probenahme von Partikeln aus der Luft am Arbeitsplatz eingesetzt werden.

Exposition sur les lieux de travail - Évaluation des performances des dispositifs de prélèvement pour le mesurage des concentrations de particules en suspension dans l'air - Partie 2: Essai de performances en laboratoire par détermination de l'efficacité de prélèvement

La présente Norme européenne spécifie un essai de performance en laboratoire pour des dispositifs de prélèvement de fractions d'aérosol inhalable, thoracique et alvéolaire, fondé sur la détermination de la courbe d'efficacité de prélèvement d'un dispositif de prélèvement à évaluer pour neuf tailles de particules au minimum. Elle spécifie des méthodes pour soumettre à essai des dispositifs de prélèvement d'aérosol dans des conditions de laboratoire prescrites, afin de vérifier si la performance d'un dispositif de prélèvement à évaluer satisfait aux exigences de l’EN 13205-1:2014.
La présente partie de l'EN 13205 s'applique à tous les dispositifs de prélèvement utilisés pour le prélèvement, à des fins sanitaires, des particules présentes sur les lieux de travail.

Izpostavljenost na delovnem mestu - Ocenjevanje lastnosti merilnikov za merjenje koncentracij lebdečih delcev - 2. del: Preskušanje usposobljenosti laboratorija na osnovi učinkovitosti vzorčenja

Standard EN 13205-2 določa preskušanje usposobljenosti laboratorija za merilnike inhalabilnih, torakalnih in respirabilnih delcev aerosolov na osnovi krivulje učinkovitosti vzorčenja merilnika kandidata pri najmanj devetih velikostih delcev. Določa metode za preskušanje merilnikov aerosolov pod določenimi laboratorijskimi pogoji, da se preskusi, ali delovanje merilnika kandidata izpolnjuje zahteve iz standarda EN 13205-1:2014. Ta del standarda EN 13205 velja za vse merilnike, ki se uporabljajo za vzorčenje delcev v zraku, ki vplivajo na zdravje na delovnem mestu.

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17-Jun-2014
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9093 - Decision to confirm - Review Enquiry

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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Exposition am Arbeitsplatz - Bewertung der Leistungsfähigkeit von Sammlern für die Messsung der Konzentration luftgetragener Partikel - Teil 2: Laborprüfung der Leistungsfähigkeit basierend auf der Bestimmung des ProbenahmewirkungsgradesExposition sur les lieux de travail - Évaluation des performances des dispositifs de prélèvement pour le mesurage des concentrations d'aérosols - Partie 2 : Essai de performances en laboratoire par détermination de l'efficacité de prélèvementWorkplace exposure - Assessment of sampler performance for measurement of airborne particle concentrations - Part 2: Laboratory performance test based on determination of sampling efficiency13.040.30Kakovost zraka na delovnem mestuWorkplace atmospheresICS:Ta slovenski standard je istoveten z:EN 13205-2:2014SIST EN 13205-2:2014en,fr,de01-september-2014SIST EN 13205-2:2014SLOVENSKI

STANDARDSIST EN 13205:20021DGRPHãþD
SIST EN 13205-2:2014
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 13205-2
June 2014 ICS 13.040.30 Supersedes EN 13205:2001English Version

Workplace exposure - Assessment of sampler performance for measurement of airborne particle concentrations - Part 2: Laboratory performance test based on determination of sampling efficiency

Exposition sur les lieux de travail - Évaluation des performances des dispositifs de prélèvement pour le mesurage des concentrations de particules en suspension dans l'air - Partie 2: Essai de performances en laboratoire par détermination de l'efficacité de prélèvement

Exposition am Arbeitsplatz - Beurteilung der Leistungsfähigkeit von Sammlern für die Messung der Konzentration luftgetragener Partikel - Teil 2: Laborprüfung der Leistungsfähigkeit basierend auf der Bestimmung des Probenahmewirkungsgrads This European Standard was approved by CEN on 7 May 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 13205-2:2014 ESIST EN 13205-2:2014

EN 13205-2:2014 (E) 2 Contents Page

Foreword .............................................................................................................................................................. 4

Introduction ......................................................................................................................................................... 6 1 Scope ...................................................................................................................................................... 7 2 Normative references ............................................................................................................................ 7 3 Terms and definitions ........................................................................................................................... 7 4 Symbols and abbreviations .................................................................................................................. 8 4.1 Symbols .................................................................................................................................................. 8 4.1.1 Latin ........................................................................................................................................................ 8 4.1.2 Greek ..................................................................................................................................................... 10 4.2 Enumerating subscripts ...................................................................................................................... 10 4.3 Abbreviations ....................................................................................................................................... 11 5 Principle ................................................................................................................................................ 11 6 Test method .......................................................................................................................................... 11 6.1 General .................................................................................................................................................. 11 6.2 Test conditions .................................................................................................................................... 11 6.3 Test variables ....................................................................................................................................... 12 6.3.1 General .................................................................................................................................................. 12 6.3.2 Particle size .......................................................................................................................................... 14 6.3.3 Wind speed ........................................................................................................................................... 14 6.3.4 Wind direction ...................................................................................................................................... 14 6.3.5 Aerosol composition ........................................................................................................................... 14 6.3.6 Sampled or internally separated mass .............................................................................................. 14 6.3.7 Aerosol charge ..................................................................................................................................... 14 6.3.8 Specimen variability ............................................................................................................................ 15 6.3.9 Excursion from the nominal flow rate ............................................................................................... 15 6.3.10 Surface treatments .............................................................................................................................. 15 7 Experimental requirements ................................................................................................................ 15 8 Calculation of sampler bias and expanded uncertainty .................................................................. 17 8.1 General .................................................................................................................................................. 17 8.2 Determination of the sampling efficiency ......................................................................................... 18 8.3 Calculation of sampler bias ................................................................................................................ 18 8.3.1 Calculation of the sampled aerosol concentration .......................................................................... 18 8.3.2 Calculation of the ideal sampled aerosol concentration ................................................................. 20 8.3.3 Calculation of the sampler bias .......................................................................................................... 21 8.4 Calculation of the expanded uncertainty of the sampler ................................................................ 21 8.4.1 General .................................................................................................................................................. 21 8.4.2 Calibration of sampler test system .................................................................................................... 22 8.4.3 Estimation of sampled concentration ............................................................................................... 23 8.4.4 Bias relative to the sampling convention .......................................................................................... 23 8.4.5 Individual sampler variability ............................................................................................................. 24 8.4.6 Excursion from the nominal flow rate ............................................................................................... 24 8.4.7 Combined uncertainty (of measurement) ......................................................................................... 28 8.4.8 Expanded uncertainty ......................................................................................................................... 31 9 Test report ............................................................................................................................................ 31 9.1 General .................................................................................................................................................. 31 SIST EN 13205-2:2014

EN 13205-2:2014 (E) 3 9.2 Testing laboratory details and sponsoring organisation ................................................................ 31 9.3 Description of the candidate sampler ............................................................................................... 31 9.4 Critical review of sampling process .................................................................................................. 32 9.5 Laboratory methods used .................................................................................................................. 32 9.6 Details of experimental design .......................................................................................................... 33 9.7 Presentation of experimental results ................................................................................................ 33 9.8 Data analysis ........................................................................................................................................ 33 9.9 Candidate sampler performance ....................................................................................................... 33 9.10 Report of workplace comparison ...................................................................................................... 33 9.11 Summary and information for the user of the sampler ................................................................... 33 Bibliography ...................................................................................................................................................... 36

SIST EN 13205-2:2014

EN 13205-2:2014 (E) 4 Foreword This document (EN 13205-2:2014) has been prepared by Technical Committee CEN/TC 137 “Assessment of workplace exposure to chemical and biological agents”, the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by December 2014 and conflicting national standards shall be withdrawn at the latest by December 2014. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. This document together with EN 13205-1, CEN/TR 13205-3, EN 13205-4, EN 13205-5 and EN 13205-6 supersedes EN 13205:2001. EN 13205, Workplace exposure — Assessment of sampler performance for measurement of airborne particle concentrations, consists of the following parts: — Part 1: General requirements; — Part 2: Laboratory performance test based on determination of sampling efficiency (the present document); — Part 3: Analysis of sampling efficiency data [Technical Report]; — Part 4: Laboratory performance test based on comparison of concentrations; — Part 5: Aerosol sampler performance test and sampler comparison carried out at workplaces; — Part 6: Transport and handling tests. Significant technical changes from the previous edition, EN 13205:2001: — This part of EN 13205 is based on Annex A of the previous edition, EN 13205:2001. — The scope has been limited to aerosol samplers, and the current version of the standard is not (directly) applicable to other types of aerosol instruments. — As this is now a standard in its own right, a clause on symbols used has been added. Almost all definitions are now given either in EN 1540, Workplace exposure — Terminology or in Part 1 of this standard.

— The method of calculating the uncertainty of a sampler or a measuring procedure has been revised in order to comply with ENV 13005. The concept of “accuracy” is no longer used, instead the concept of “expanded uncertainty” is used. — The five major sources of uncertainty due to aspects of the sampling performance of an aerosol sampler (calibration of sampler test system, estimation of sampled concentration, bias relative to the sampling convention, individual sampler variability and excursion from nominal flow rate) are described with equations on how to incorporate these uncertainties into the expanded uncertainty of a sampler. CEN/TR 13205-3 gives recommendations how these entities may be calculated from measured sampling efficiency data. — The list of the particle size distributions (per sampling convention) to be used for the evaluation of sampler performance has been restricted at the lower end to reflect that particles with an aerodynamic SIST EN 13205-2:2014

EN 13205-2:2014 (E) 5 diameter less than 0,5 µm are not sampled due to aerodynamic forces. In the current version, an additional requirement on the size distributions is that at least 84 % of the aerosol mass consists of particles exceeding 0,5 µm. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: 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 the United Kingdom. SIST EN 13205-2:2014

EN 13205-2:2014 (E) 6 Introduction EN 481 defines sampling conventions for the particle size fractions to be collected from workplace atmospheres in order to assess their impact on human health. Conventions are defined for the inhalable, thoracic and respirable aerosol fractions. These conventions represent target specifications for aerosol samplers, giving the ideal sampling efficiency as a function of particle aerodynamic diameter. In general, the sampling efficiency of real aerosol samplers will deviate from the target specification, and the aerosol mass collected will therefore differ from that which an ideal sampler would collect. In addition, the behaviour of real samplers is influenced by many factors such as external wind speed. In many cases there is an interaction between the influence factors and fraction of the airborne particle size distribution of the environment in which the sampler is used. EN 13205 (all parts) enables manufacturers and users of aerosol samplers to adopt a consistent approach to sampler validation, and provide a framework for the assessment of sampler performance with respect to EN 481 and EN 482. It is the responsibility of the manufacturer of aerosol samplers to inform the user of the sampler performance under the laboratory conditions1) specified in this part of EN 13205. It is the responsibility of the user to ensure the actual conditions of intended use are within what the manufacturer specifies as acceptable conditions according to the performance test.

1) The inhalable convention is undefined for particle sizes in excess of 100 µm or for wind speeds greater than 4 m/s. The tests required to assess performance are therefore limited to these conditions. If such large particle sizes or wind speeds actually existed at the time of sampling, it is possible that different samplers meeting this document give different results. SIST EN 13205-2:2014

EN 13205-2:2014 (E) 7 1 Scope This European Standard specifies a laboratory performance test for samplers for the inhalable, thoracic and respirable aerosol fractions, based on determining the sampling efficiency curve of a candidate sampler at a minimum of nine particle sizes. It specifies methods for testing aerosol samplers under prescribed laboratory conditions in order to test whether the performance of a candidate sampler fulfils the requirements of EN 13205-1:2014. This part of EN 13205 is applicable to all samplers used for the health-related sampling of particles in workplace air. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 1540, Workplace exposure — Terminology EN 13205-1:2014, Workplace exposure — Assessment of sampler performance for measurement of airborne particle concentrations — Part 1: General requirements CEN/TR 13205-3:2014, Workplace exposure — Assessment of sampler performance for measurement of airborne particle concentrations — Part 3: Analysis of sampling efficiency data EN 13205-5:2014, Workplace exposure — Assessment of sampler performance for measurement of airborne particle concentrations — Part 5: Aerosol sampler performance test and sampler comparison carried out at workplaces EN ISO 13137, Workplace atmospheres — Pumps for personal sampling of chemical and biological agents - Requirements and test methods (ISO 13137) 3 Terms and definitions For the purpose of this document, the terms and definitions given in EN 1540, EN 13205-1:2014 and the following apply. NOTE With regard to EN 1540, in particular, the following terms are used in this document: total airborne particles, respirable fraction, sampling efficiency, static sampler, thoracic fraction, inhalable fraction, measuring procedure, non-random uncertainty, random uncertainty, expanded uncertainty, standard uncertainty, combined standard uncertainty, uncertainty (of measurement), coverage factor and precision. 3.1 relative concentration concentration expressed as a fraction of the total airborne concentration 3.2 total airborne particle concentration concentration of aerosol particles present in the air before the particles are affected by the presence of the sampler, or in the case of a personal sampler by the presence of the person wearing the sampler SIST EN 13205-2:2014

EN 13205-2:2014 (E) 8 4 Symbols and abbreviations 4.1 Symbols 4.1.1 Latin

ADA,σA,D() relative lognormal aerosol size distribution, with mass median aerodynamic diameter DA and geometric standard deviation 1A, [1/µm] NOTE The word “relative” means that the total amount of particles is unity [-], i.e. ADA,σA,D()dD0∞∫=1.

Cstd target sampled relative aerosol concentration, expressed as a fraction of the total airborne aerosol concentration, that would have been sampled using an ideal sampler with a sampling efficiency identical to the sampling convention, FD(), for aerosol size distribution A, [-] Ci mean sampled relative aerosol concentration, expressed as a fraction of the total airborne aerosol concentration, calculated to be obtained when using the candidate sampler, for aerosol size distribution A at influence variable valueςi, [-] c candidate sampler correction factor for bias correction, either prescribed by sampler manufacturer or measuring procedure, or assigned the value c = 1.00, [-] D aerodynamic diameter, [µm]

DA mass median aerodynamic diameter of a lognormal aerosol size distribution A, [µm]

DAa mass median aerodynamic diameter a of a lognormal aerosol size distribution A, [µm]

Dmax diameter of the end of the integration range of the sampled aerosol, [µm]

Dmin diameter of the beginning of the integration range of the sampled aerosol, [µm] Dp aerodynamic diameter of test particle p (p = 1 toNP), [µm] EiDp() mean sampling efficiency of the candidate sampler for test particle size p at influence variable valueςi, [-] – (polygonal approximation method) EiQ,Dp() mean sampling efficiency curve of the candidate sampler at flow rate Q for test particle size p at influence variable valueςi, [-] – (polygonal approximation method)

estEisD() fitted sampling efficiency curve of the candidate sampler individual s at influence variable valueςi, [-] – (curve-fitting method)

estEisQ,D() fitted sampling efficiency curve of the candidate sampler individual s at flow rate Q for influence variable valueςi, [-] – (curve-fitting method) eipr[s]andeips[r] experimentally determined efficiency value, with notation for polygonal approximation and curve-fitting methods, respectively. The subscripts are for influence variable valueςi, particle size F (p = 1 toNP), sampler individual s (s = 1 toNS) and repeat r (r = 1 toNR), [-] – (notation for polygonal approximation and curve-fitting methods, respectively) FD() target sampling convention, [-] SIST EN 13205-2:2014

EN 13205-2:2014 (E) 9 []iprsgand[]ipsrg aerosol concentration sampled by the candidate sampler. The subscripts are for influence variable valueςi, particle size p (p = 1 to NP), sampler individual s (s = 1 to NS) and repeat r (r = 1 to NR), [mg/m3] or [1/m3] – (notation for polygonal approximation and curve-fitting methods, respectively) hiprandhips[r] corresponding total airborne aerosol concentration estimated from the sharp-edged probe values. The subscripts are for influence variable value i (i = 1 to NIV), particle size p (p = 1 to NP), sampler individual s (s = 1 to NS) and repeat r (r = 1 to NR), [mg/m3] or [1/m3] – (notation for polygonal approximation and curve-fitting methods, respectively)

miDA,σA,Q() mean sampled aerosol mass, expressed as a fraction of the total airborne aerosol mass, calculated to be obtained when using the candidate sampler with flow rateQ, to sample aerosol size distribution A at influence variable valueςi, [-]

NIV number of values for the other influence variables at which tests were performed,

NP number of test particle sizes

NRep number of repeats at particle size p for candidate sampler individual s at influence variable value ςi – (in the polygonal approximation method

NRep equals the number of repeats, whereas in the curve-fitting method it equals the number of repeats per candidate sampler individual)

NS number of candidate sampler individuals – (In the polygonal approximation method

NS equals the number of sampler individuals tested per repeat, whereas in the curve-fitting method it equals the total number of sampler individuals tested.) Q actual flow rate of candidate sampler, [l/min]

Q0 nominal flow rate of sampler, [l/min]

q0 parameter expressing whether the nominal or actual flow rate is used for the calculation of sampled respirable and thoracic aerosol fractions, [-]

qiDA,σA() flow rate dependence of sampled mass for aerosol size distribution A at influence variable valueςi, [-]

sCandSampl-Flowia non-random uncertainty (of measurement) of the calculated sampled concentration, due to excursion from nominal flow and/or deviation from initial flow, for the ath aerosol size distribution A at influence variable valueςi, [-]

sδFlowSet+δPump() random uncertainty for combined rectangular distribution based on allowed initial flow deviation from nominal flow rate and pump flow deviation, [-]

UCandSampl expanded uncertainty (of measurement) of the calculated sampled concentration due to the candidate sampler, [-]

uCandSampl combined uncertainty (of measurement) of the calculated sampled concentration due to the candidate sampler, [-]

uCandSampli combined uncertainty (of measurement) of the candidate sampler, at influence variable valueςi, [-]

uCandSampl-Biasi standard uncertainty (of measurement) due to bias (non-random errors) in relation to the sampling convention of the candidate sampler at influence variable valueςi, [-]

uCandSampl-Calibri standard uncertainty (of measurement) (non-random and random errors) of the SIST EN 13205-2:2014

EN 13205-2:2014 (E) 10 calculated sampled concentration, due to the calibration uncertainty of the experiment, calculated as the RMS of the corresponding relative uncertainties over all

NSD aerosol size distributions A at influence variable valueςi, [-]

uCandSampl-Flowi standard uncertainty (of measurement) of the calculated sampled concentration, due to flow rate deviation at influence variable valueςi, [-]

uCandSampl-ModelCalci standard uncertainty (of measurement) of the calculated sampled concentration (random errors), due to the uncertainty of the fitted model, calculated as the RMS of the corresponding relative uncertainties over all

NSD aerosol size distributions A at influence variable valueςi, [-]

uCandSampl-nR combined uncertainty (of measurement) of the sampled concentration (non-random errors) due to the candidate sampler, [-]

uCandSampl-nRi combined uncertainty (of measurement) of the sampled concentration (non-random errors) due to the candidate sampler, at influence variable valueςi, [-]

uCandSampl-R combined uncertainty (of measurement) of the sampled concentration (random errors) due to the candidate sampler, [-]

uCandSampl-Ri combined uncertainty (of measurement) of the sampled concentration (random errors) due to the candidate sampler, at influence variable valueςi, [-]

uCandSampl-Variabilityi standard uncertainty (of measurement) of the sampled concentration (random errors) due to differences among candidate sampler individuals at influence variable valueςi, [-] Wp weighted average of integration of aerosol size distribution A between two particle sizes, [-] – (polygonal approximation) 4.1.2 Greek ∆i bias or relative error in the aerosol concentration measured using the candidate sampler, for aerosol size distribution A, at influence variable valueςi, [-]

δFlowSet maximum relative error allowed in setting the flow rate, [-]

δPump maximum relative change in flow rate allowed by pump flow rate stability, [-] []iprsεand[]ipsrε Random experimental error at particle size p, repeat r and candidate sampler s at influence variable valueςi, [-] – (notations for polygonal approximation and curve-fitting methods, respectively) ς value of other influence variable values, as for example wind speed and mass loading of sampler, with values for i = 1 to NIV, [various dimensions] ςi ith value of any other influence variable NOTE The dimension of each ςi depends on the influence variable. The dimension selected, however, is not critical, as the values are never part in any calculation.

σA geometric standard deviation of a lognormal aerosol size distribution A from Table A.2 [-]

σAa geometric standard deviation a of a lognormal aerosol size distribution A, [µm] – 4.2 Enumerating subscripts a for test aerosols SIST EN 13205-2:2014

EN 13205-2:2014 (E) 11 I

for selected value of distinguishable values of an influence variable i for influence variable values, ς i0

for selected value of non-distinguishable values of an influence variable which causes the largest combined standard uncertainty for the candidate sampler p for test particle size r for repeats s for candidate sampler individual 4.3 Abbreviations RMS Root Mean Square 5 Principle The test method described in this part of EN 13205 is based on the measurement of the candidate sampler’s sampling efficiency as a function of particle aerodynamic diameter, whether all aspirated particles are part of the sample (as for most inhalable samplers) or if a particle size-dependent penetration occurs between the inlet and the collection substrate (as for thoracic and respirable samplers). The bias versus the sampling convention is calculated based on the measured sampling efficiencies. Other sampling errors due to non-random and random sources of error are also determined, e.g. individual sampler variability, excursion from nominal flow rate, estimation of sampled concentration and experimental errors. The purpose of the laboratory experiments is to determine the sampling efficiency as a function of particle aerodynamic diameter over the relevant size range, and also as a function of any other relevant variables (as determined in the critical review, see EN 13205-1:2014, 6.2). Mathematical modelling is used to estimate the concentrations that would be sampled from a range of ideal log-normally distributed aerosols, using both the measured sampler efficiency and the target sampling convention. From these data, the sampler performance is estimated. 6 Test

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