EN 14907:2005

SLOVENSKI STANDARD
01-december-2005
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Ambient air quality - Standard gravimetric measurement method for the determination of
the PM2,5 mass fraction of suspended particulate matter
Luftbeschaffenheit - Gravimetrisches Standardmessverfahren für die Bestimmung der
PM2,5-Massenfraktion des Schwebstaubs
Qualité de l'air ambiant - Méthode normalisée de mesurage gravimétrique pour la
détermination de la fraction massique MP2,5 de matiere particulaire en suspension
Ta slovenski standard je istoveten z: EN 14907:2005
ICS:
13.040.20 Kakovost okoljskega zraka Ambient atmospheres
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 14907
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2005
ICS 13.040.20
English Version
Ambient air quality - Standard gravimetric measurement method
for the determination of the PM2,5 mass fraction of suspended
particulate matter
Qualité de l'air ambiant - Méthode de mesurage Luftbeschaffenheit - Gravimetrisches
gravimétrique de référence pour la détermination de la Standardmessverfahren für die Bestimmung der PM2,5-
fraction massique PM 2,5 de matière particulaire en Massenfraktion des Schwebstaubs
suspension
This European Standard was approved by CEN on 22 July 2005.
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 Central Secretariat 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 Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 14907:2005: E
worldwide for CEN national Members.

Contents page
Foreword .3
Introduction.4
1 Scope .5
2 Normative references .5
3 Terms, definitions and abbreviations.6
3.1 Terms and definitions.6
3.2 Abbreviations .6
4 Principle.7
4.1 Description of the standard measuring principle.7
4.2 Description of QA/QC procedures.7
5 Equipment and facilities.8

5.1 Sampling system components .8
5.2 Weighing facilities.13
6 Sampling and weighing procedure.13
6.1 General .13
6.2 Weighing room procedures.13
6.3 Unloaded filter weighing.14
6.4 Sampling period.14
6.5 Sample storage and transport procedures .14
6.6 Loaded filter weighing .15
7 Additional quality assurance and quality control.15
7.1 General .15
7.2 Maintenance of the sampling system.15
7.3 Calibration .15
7.4 Field blanks .16
8 Expression of results.16
9 Performance characteristics of the method.16
9.1 General .16
9.2 GUM concept.17
9.3 Individual uncertainty sources .18
9.4 Expanded uncertainty vs. EU Data Quality Objectives .24
Annex A (informative) Equivalence test procedure for non-standard measurement methods .25
A.1 General .25
A.2 Formal procedures.25
A.3 Overview of test procedure.26
Annex B (normative) Data-quality objectives (source: Annex VIII of [2]).27
Annex ZA (informative) Relationship with EU Directives .28
Bibliography.29
Foreword
This European Standard (EN 14907:2005) has been prepared by Technical Committee CEN/TC 264 “Air
quality”, 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 March 2006, and conflicting national standards shall be withdrawn at
the latest by March 2006.
This European Standard has been prepared under a mandate given to CEN by the European Commission
and the European Free Trade Association, and supports essential requirements of EU Directive(s).
For relationship with EU Directive(s), see informative annex ZA, which is an integral part of this European
Standard.
As part of a continuous quality improvement, it is anticipated that this standard and EN 12341 (PM ) may be
reviewed by the Technical Committee in the near future.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland
and United Kingdom.
Introduction
For air quality across the European Union to be assessed on a consistent basis, Member States need to
employ standard measurement techniques and procedures. The aim of this European Standard is to present a
harmonised methodology for monitoring the 2,5 µm mass fraction of suspended particulate matter (PM ) in
2,5
ambient air, following Community Directive 96/62/EC on ambient air quality assessment and management [1],
and Council Directive 1999/30/EC relating to limit values for sulphur dioxide, nitrogen dioxide and oxides of
nitrogen, particulate matter and lead in ambient air [2], which sets the parameters specific to the assessment of
particulate matter.
The standard method set out in this European Standard is focused primarily on harmonisation and
improvement of the data quality of measurement methods used in monitoring networks, but is not necessarily
best suited for practical use in routine monitoring.
There are no traceable reference standards for PM measurements. Therefore, the standard method set out
2,5
in this European Standard defines the measured quantity by convention, specifically by the sample inlet
design and associated operational parameters covering the whole measurement process. The standard
contains:
 manual gravimetric standard measurement method for PM using single filters;
2,5
 summary of performance characteristics of the method, including measurement uncertainty;
 procedure for determining whether non-standard measurement methods (like other manual gravimetric or
automatic monitoring methods) are equivalent to this standard method (Annex A).
The precision and performance characteristics described in this European Standard were determined in 9
different comparative and validation trials. The trials were performed at 9 different sites in northern, middle
and southern European countries in order to cover a wide range of relevant ambient air conditions. The trials
were sponsored by the European Commission and the European Free Trade Association.
In addition to the measurement procedure of the 2,5 µm mass fraction of suspended particulate matter (PM )
2,5
in ambient air being described in this European Standard, there is European Standard EN 12341 [3] dealing
with the measurement of PM .
1 Scope
This European Standard describes a standard method for determining the PM mass concentration of
2,5
suspended particulate matter in ambient air by sampling the particulate matter on filters and weighing them by
means of a balance.
Measurements are made over a sampling period of about 24 h, and in line with the Directive, are expressed
as µg/m , where the volume of air is the volume at ambient conditions near the inlet at the time of sampling.
The range of application of the standard is from 1 µg/m (i.e. the limit of detection of the standard
measurement method expressed as its uncertainty) up to 120 µg/m (i.e. the maximum concentration level
observed during the field study undertaken by CEN/TC 264/WG 15 to validate the standard).
NOTE Although the standard is not validated for concentrations over 120 µg/m , its range of application could well be
extended to commonly encountered ambient concentrations up to circa 200 µg/m when using glass or quartz fibre filters.
At these high concentrations and particulate mass loadings no filter clogging is to be expected. Also the flow rate can be
easily maintained at the nominal setting.
The equivalence procedure in Annex A specifies two approaches, depending on whether the candidate
method differs slightly or fundamentally from the standard method.
In the former case, involving only slight differences from the standard method (“variations on a theme”) Annex
A provides a restricted procedure to compare only the pertinent differences, instead of a full field test. This
part of the annex serves to give practical guidance for determining equivalence for measurement methods
commonly used in monitoring networks, and includes examples of common variations to the standard method,
such as different filter storing or conditioning procedures and the variation of the standard method for the
application as automated filter changer.
In the latter case, involving a full set of field tests, the procedure serves to determine equivalence only within
the range of conditions under which the field tests are carried out. The equivalence can be shown to hold for
conditions prevailing within European countries by carrying out the field test in situations covering a suitable
range of relevant ambient parameters (such as concentration and composition of the suspended particulate
matter, temperature, and humidity).
Although this European Standard does not explicitly address automatic monitoring methods for the
measurement of the PM mass fraction in ambient air
...