SIST-TP CEN/TR 17055:2017

Workplace exposure - Measurement of chemical agents complying with the requirements given in EN 482 and either one of EN 838, EN 1076, EN 13205, EN 13890 and EN 13936 - Choice of procedures

This CEN Technical Report describes the criteria for choosing measuring methods complying with the requirements given in EN 482 and either one of EN 838, EN 1076, EN 13205, EN 13890 and EN 13936.

Exposition am Arbeitsplatz - Messung von chemischen Arbeitsstoffen, welche die Anforderungen nach EN 482 sowie nach einer von EN 838, EN 1076, EN 13205, EN 13890 und EN 13936 erfüllen - Auswahl von Verfahren

Exposition sur les lieux de travail - Mesurage des agents chimiques conformément aux exigences de l'EN 482 et de l'une des normes EN 838, EN 1076, EN 13205, EN 13890 et EN 13936 - Choix des procédures

Le présent Rapport technique du CEN (WI 00137065) décrit la manière dont ont été choisies les procédures pour le mesurage des agents chimiques conformes aux exigences spécifiées dans l'EN 482 et dans l'une des normes EN 838, EN 1076, EN 13890, EN 13936 et/ou EN 13205, dans la mesure où elles sont applicables.
Le présent document se rapporte à la sélection d'agents chimiques et de groupes de substances associés et à l'établissement des listes de méthodes correspondantes. Il décrit l'évaluation des procédures de mesure disponibles afin de sélectionner celle qui est la mieux adaptée à un agent chimique particulier.
Le présent document est également destiné à :
   fournir un moyen permettant de comparer, pour un agent chimique donné, une nouvelle procédure de mesure à celles listées dans la base de données GESTIS - Méthodes d'analyse [2] ;
   évaluer et classer, pour un agent chimique donné, une procédure de mesure donnée (provenant d'une source acceptée) ne figurant pas encore dans la base de données GESTIS - Méthodes d'analyse [2].

Izpostavljenost na delovnem mestu - Meritve kemičnih agensov v skladu z zahtevami standarda EN 482 in enega izmed standardov EN 838, EN 1076, EN 13205, EN 13890 in EN 13936 - Izbira postopkov

To tehnično poročilo CEN opisuje merila za izbiro merilnih metod, ki so v skladu z zahtevami standarda EN 482 in enega od standardov EN 838, EN 1076, EN 13205, EN 13890 in EN 13936.

General Information

• Status: Published
• Public Enquiry End Date: 01-Dec-2016
• Publication Date: 11-Jun-2017
• ICS: 13.040.30 - Workplace atmospheres
• Technical Committee: KAZ - Air quality
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 29-May-2017
• Due Date: 03-Aug-2017
• Completion Date: 12-Jun-2017
• Ref Project: CEN/TR 17055:2017 - Workplace exposure - Measurement of chemical agents complying with the requirements given in EN 482 and either one of EN 838, EN 1076, EN 13205, EN 13890 and EN 13936 - Choice of procedures

Standards Content (Sample)

SLOVENSKI STANDARD
SIST-TP CEN/TR 17055:2017
01-julij-2017
,]SRVWDYOMHQRVWQDGHORYQHPPHVWX0HULWYHNHPLþQLKDJHQVRYYVNODGX]
]DKWHYDPLVWDQGDUGD(1LQHQHJDL]PHGVWDQGDUGRY(1(1(1
(1LQ(1,]ELUDSRVWRSNRY
Workplace exposure - Measurement of chemical agents complying with the requirements
given in EN 482 and either one of EN 838, EN 1076, EN 13205, EN 13890 and EN
13936 - Choice of procedures
Exposition am Arbeitsplatz - Messung von chemischen Arbeitsstoffen, welche die
Anforderungen nach EN 482 sowie nach einer von EN 838, EN 1076, EN 13205, EN
13890 und EN 13936 erfüllen - Auswahl von Verfahren
Exposition sur les lieux de travail - Mesurage des agents chimiques conformément aux
exigences de l'EN 482 et de l'une des normes EN 838, EN 1076, EN 13205, EN 13890
et EN 13936 - Choix des procédures
Ta slovenski standard je istoveten z: CEN/TR 17055:2017
ICS:
13.040.30 Kakovost zraka na delovnem Workplace atmospheres
mestu
SIST-TP CEN/TR 17055:2017 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST-TP CEN/TR 17055:2017


CEN/TR 17055
TECHNICAL REPORT

RAPPORT TECHNIQUE

February 2017
TECHNISCHER BERICHT
ICS 13.040.30
English Version

Workplace exposure - Measurement of chemical agents
complying with the requirements given in EN 482 and
either one of EN 838, EN 1076, EN 13205, EN 13890 and
EN 13936 - Choice of procedures
Exposition sur les lieux de travail - Mesurage des Exposition am Arbeitsplatz - Messung von chemischen
agents chimiques conformément aux exigences Arbeitsstoffen, welche die Anforderungen nach EN 482
spécifiées dans l'EN 482 et dans l'une des normes EN sowie nach einer von EN 838, EN 1076, EN 13205, EN
838, EN 1076, EN 13205, EN 13890 et EN 13936 - 13890 und EN 13936 erfüllen - Auswahl von Verfahren
Choix des modes opératoires


This Technical Report was approved by CEN on 9 January 2017. It has been drawn up by the Technical Committee CEN/TC 137.

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, Serbia, 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
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TR 17055:2017 E
worldwide for CEN national Members.

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Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Measuring procedures . 5
2.1 General . 5
2.2 Selection of chemical agents . 5
3 Method lists . 6
3.1 General . 6
3.2 Origin of the measuring procedure . 6
3.3 Structure of the method lists . 9
4 Evaluation of measuring procedures . 10
4.1 General . 10
4.2 Rating. 10
4.3 Downgrade of a rating . 13
4.4 Expanded uncertainty . 14
Annex A (informative) Selection of chemical agents related to 2.2 . 15
Annex B (informative) Examples of method lists . 19
Bibliography . 28

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European foreword
This document (CEN/TR 17055:2017) 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.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
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Introduction
Article 3 (10) of the Chemical Agents Directive 98/24/EC [1] called for suitable analytical methods for
hazardous substances in workplace atmospheres. However, CEN/TC 137 has adopted a significantly
different strategy of standardization which has not involved preparation of separate European
Standards for measuring procedures. Instead, CEN/TC 137 has developed several European Standards
that present general requirements for measuring procedures and which are used to test whether
measuring procedures meet these requirements. A measuring procedure that fulfils these requirements
is suitable for the measurement of hazardous substances in workplace atmospheres in the sense of
Directive 98/24/EC. To fulfil the demand of Directive 98/24/EC it is necessary to find out whether
measuring procedures are available that meet the requirements of the European Standards elaborated
by CEN/TC 137.
Several EU Members have committees or organisations which issue measuring procedures.
Furthermore, for example, the US National Institute for Occupational Safety and Health (NIOSH) and
other institutions of Non-EU-Members publish suitable measuring procedures. The main aim of this
CEN Technical Report is to check whether these measuring procedures fulfil the requirements of
EN 482.
EN 482 is one of the basic standards elaborated by CEN/TC 137. Whereas, its first edition was already
published in 1994, the second edition was published in 2006 subsequent to a major revision that took
the principles on laid down in ISO/IEC Guide 98-3 (GUM). As consequence of the issue of the revised
EN 482 in 2006 its “daughter standards” EN 838, EN 1076, EN 13890 and EN 13936 needed to be
revised fundamentally, too. In 2012, a third edition of EN 482 was published taking into account the
changes introduced to its daughter standards during their revisions. In 2015, EN 482 has been amended
by introducing a new sub-clause dealing with chemical agents with low limit values and republished as
fourth edition of EN 482 consolidated with its Amendment 1.
The “major revision” of EN 482 was one main task of the European project “Analytical methods for
chemical agents” funded by the Commission under the Mandate BC/CEN/EN/TR 000/2002-16. The
second part of this project was the selection and examination of existing measuring procedures.
The European project report comprises measuring procedures for 126 high profile hazardous
substances. The measuring procedures were listed in “methods sheets” and selected (analytical)
methods were rated with regard to the requirements of the first edition of EN 482 published in 1994.
To make these lists and method sheets easily accessible, a database was established and made publicly
available on the IFA homepage designated as “GESTIS - Analytical methods” [2].
From today's point of view, the lists and method sheets are no longer up to date. For some chemical
agents the occupational exposure limit values have changed in recent years. Additionally, in the
meantime several new measuring procedures have been published which base on the requirements of
subsequent editions of EN 482.
For those reasons, it was decided to update the database “Analytical methods for chemical agents”
accordingly.
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1 Scope
This CEN Technical Report describes how the measuring procedures for chemical agents complying
with the requirements given in EN 482 and either one of EN 838, EN 1076, EN 13890, EN 13936 and/or
the EN 13205 series, as far as applicable, have been chosen.
This document refers on the selection of chemical agents and related substance groups and the
establishment of corresponding method lists. It describes the evaluation of available measuring
procedures in order to select for a particular chemical agent the most appropriate one.
This document is also intended to:
— provide a means to compare for a given chemical agent a new measuring procedure with those
listed in the database GESTIS Analytical methods [2];
— to evaluate and rate a given measuring procedure (from an accepted source) for a given chemical
agent not yet selected in the database GESTIS Analytical methods [2].
2 Measuring procedures
2.1 General
Measuring procedures (“analytical methods”) for chemical agents in workplace atmospheres are
available from many sources. In Europe, for example in France, Germany, Spain and UK “official”
measuring procedures for workplace atmospheres are published. Furthermore, a number of
International Standards have been promulgated the use in this field, but the most important sources of
measuring procedures from countries outside Europe are those published by OSHA and NIOSH.
2.2 Selection of chemical agents
Further surveys show that there are about 2000 different chemical agents, mixtures and preparations
with existing limit values in Europe [3]. Beyond, many so called “derived no-effect levels” (DNEL's) have
been published by the European Chemical Agency (ECHA) since 2010 [4]. It is far beyond the
application range of the database to select measuring procedures for all chemical agents with a limit
value. In any case for many chemical agents no measuring procedure exists. Furthermore, due to the
very specific problems of fibre measurements and measurements of nanoparticles, no procedures for
these chemical agents are listed.
The selection of chemical agents is based mainly on the number of measurements carried out in France
and Germany. Both countries have similar databases for measurements in workplace atmospheres, and
in both countries several hundred thousand measurements have been performed since the early 1970s
[5], [6]. These databases give a very good overview about chemical agents of high priority. The chemical
agents for the method lists are mainly selected from that group of chemical agents which remained
more or less unchanged since 2006, and a few other criteria:
— high number of measurements;
— high profile substances (e.g. diesel fume);
— EU limit value and a reasonable number of measurements;
— limit values in most countries of the EU.
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The following substances or groups of chemical agents were selected:
a) aerosols
— inhalable and respirable dust;
— crystalline silica;
— diesel fume;
— metal working fluids/oil mist.
b) metals
— Ag, As, Ba-soluble, Be, Cd, Co, Cr, Cr (VI), Cu, Hg, Mn, Ni, Ni-soluble, Pb, Sb, Sn.
c) Organic substances
— Acetonitrile, Acrylates, Alcohols, Aldehydes, Aliphatic amines, Aliphatic ester alcohols, Aliphatic
ethers, Alkanolamines, N-Alkyl-2-pyrrolidons, Amides, Chlorinated aromatic hydrocarbons,
Cresols, Cyclic ethers, hydrocarbons (aliphatic, aromatic, cyclic), Esters, Glycol esters,
Halogenated hydrocarbons (aliphatic), Isocyanates, Ketones (aliphatic and cyclic), Organic
acids, Oxiranes, Phenol
d) Gases
— CO, CO , NH , N O, NO, NO , PH , SO halogens
2 3 2 2 3 2,
e) Inorganic acids and alkaline substances
— Hydrogen cyanide and Cyanides, Hydrogen fluoride and fluorides, Hydroxides, Particulate
inorganic acids and anhydrides, Volatile inorganic acids
A list of the chemical agents selected for the database GESTIS – Analytical methods [2] is given in
Annex A.
3 Method lists
3.1 General
After selection of chemical agents and related substance groups the basic requirements given in 3.2 are
specified.
3.2 Origin of the measuring procedure
The following criteria are taken into account for the compilation of the measuring procedures:
a) The measuring procedure is examined by an independent group and has already been published in
another set of (measuring) procedures for measurements in workplace atmospheres.
b) The measuring procedure has been designed for personal exposure measurement and requires the
use of a personal sampler.
c) Measuring procedures either using static (area) sampling only or developed for ambient air are
excluded from further considerations.
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The accepted sources are listed in Table 1.
Table 1 — Accepted sources of methods for workplace air measurements
Abbreviation Language Source Web address
http://www.cen.eu/
EN English European Organization for
(French/ Standardization (CEN),
with costs
German) CEN-CENELEC Management Centre
Avenue Marnix 17, B-1000 Brussels,
Belgium
European Standards
Also available from National Standards
Bodies, e.g. AFNOR, AENOR, BSI, DIN, SIS
etc.
ISO English International Organization for http://www.iso.org
(French) Standardization (ISO),
with costs
ISO Central Secretariat
Chemin de Blandonnet 8, Case Postale
401
CH-1214 Vernier, Geneva, Switzerland:
International Standards
Also available from National Standards
Bodies, e.g. AFNOR, AENOR, BSI, DIN, SIS
etc.
http://publikationen.dguv.de/
DGUV I German Deutsche Gesetzliche Unfallversicherung
dguv/udt_dguv_main.aspx?QPX
(DGUV):
=TUlEPSZDSUQ9MTAwNzI6U0
Von den Berufsgenossenschaften
cjR2VmYWhyc3RvZmZl
anerkannte Analysenverfahren zur
for free
Feststellung der Konzentration
krebserzeugender Arbeitsstoffe in der
Luft in Arbeitsbereichen
83 methods since 1983
(some methods are published in DFG (E))
IFA German http://bgia-
Institut für Arbeitsschutz der Deutschen
arbeitsmappedigital.de/login.h
Gesetzlichen Unfallversicherung
tml
IFA-Arbeitsmappe, Messung von
with costs
Gefahrstoffen,
Sankt Augustin.
Erich Schmidt Verlag, Berlin,
Loose leaf edition, > 50 supplements
since 1988
http://onlinelibrary.wiley.com
DFG (D) German Deutsche Forschungsgemeinschaft
/book/10.1002/3527600418/
(DFG):
topics
Analytische Methoden zur Prüfung
for free
gesundheitsschädlicher Arbeitsstoffe –
Luftanalysen,
Ed. H. Greim, Wiley-VCH, Weinheim,
Germany
Loose leaf edition, 18 supplements since
1976
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Abbreviation Language Source Web address
http://onlinelibrary.wiley.com
DFG (E) English Deutsche Forschungsgemeinschaft
/book/10.1002/3527600418/
(DFG):
topics
Analyses of Hazardous Substances in Air,
for free
Wiley-VCH. Weinheim, New York
http://www.hse.gov.uk/pubns
MDHS English Health and Safety Laboratory (HSL),
/mdhs/
Harpur Hill, Buxton, Derbyshire
SK17 9JN, UK: for free
Methods for the Determination of
Hazardous Substances (MDHS)
100 methods since 1979
http://www.inrs.fr/publication
Metropol French Institut National de Recherche et de
s/bdd/metropol.html
(English) Sécurité (INRS)
for free
MétroPol – Métrologie des polluants
(Recueil des méthodes de prélèvement et
d'analyse de l'air pour l'évaluation de
l'exposition professionnelle aux agents
chimiques) – INRS, Paris
CD edition with cost (new edition every 1
or 2 years) and Website (free
downloadable .PDF files) updated as
needed.
124 methods (1998 to 2016)
New database: > 300 methods available
from 2016
http://www.insht.es/portal/sit
MTA Spanish Instituto Nacional de Seguridad e Higiene
e/Insht/menuitem.a82abc159
en el Trabajo (INSHT),
115c8090128ca10060961ca/?
c/ Torrelaguna 73, 28027 Madrid
vgnextoid=f6a8908b51593110
Métodos de Toma de muestra y Análisis
VgnVCM100000dc0ca8c0RCRD
(MTA)
for free
80 methods since1987
http://www.cdc.gov/niosh/do
NIOSH English National Institute for Occupational Safety
cs/2003-154/
and Health (NIOSH), 4676 Columbia
for free
Parkway, Cincinnati, OH 45226–1998,
USA:
http://www.osha.gov/dts/sltc
OSHA English Occupational Safety and Health
/methods/
Administration (OSHA), Salt Lake
Technical Center, 8660 South Sandy for free
Parkway, Sandy, UT 84070, USA:
OSHA Sampling and Analytical Methods
http://www.irsst.qc.ca/laborat
IRSST English Institut de recherche Robert-Sauvé en
oires/outils-
santé et en sécurité de travail (IRSST)
French
references/methodes-
505 Maisonneuve Blvd West, Montréal,
laboratoire
Québec H3A 3C2, CANADA
for free
NOTE For lack of space only the abbreviations of the method publisher are given in the first table column and
in the method lists.
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3.3 Structure of the method lists
The aim of the lists of measuring procedures (“method lists”) is to give the reader for the chemical agent
of interest a first overview and basic information about existing measuring procedures and a first
impression of their potential usefulness.
Each method list comprises the following fields of information:
Page header:
— List Number
List numbers are ordered from the table where the substances are sorted by WORD by rising CAS-
numbers.
— Substance name, CAS- number, EINECS-Number
These characters are for identification of the substance.
— Occupational Exposure Limit Values (8 h, 15 min, ceiling)
Occupational Exposure Limit values (OELs) can easily be found in the database “GESTIS -
International limit values for chemical agents”[3]. Only OELs from European countries are
considered.
NOTE 1 OELs can vary over a wide range.
— Aerosol fraction (if applicable)
Table Header:
— Number
Sequential number of the measuring procedure in the individual method table.
— Source and method name
Short form of the source of the measuring procedure (see Table 1) and name of the measuring
procedure, web address for the method download
— Language
Language of the measuring procedure
NOTE 2 Some measuring procedures are published in the native language and in English for international
users.
— Year of publication
Year when the measuring procedure was issued.
NOTE 3 E.g. the DFG methods (Germany) are normally published as a group of methods, and for this reason the
year of publication and the year of completing the method can be different.
— Principle of the method
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Brief description of the principle of the measuring procedure. Contains information on the sampling
substrate, sample preparation and analytical technique.
— Flow rate/ recommended air volume
The column gives information about the sampling conditions (flow rate, recommended air volume)
described in the measuring procedure.
— LOQ/ Validated working range /Expanded uncertainty/Variability
These data are given in the method description, when available. According to the recommended
sampling conditions and the analytical conditions the basic validation data LOQ (Limit of
quantification) and/or the validated working range are given. LOQ and the expanded uncertainty
(U) are the preferred values. Where alternative data are given in that entry, e.g. limit of detection
(LOD), overall precision or accuracy, this is mentioned accordingly.
— Rating
Rating of the measuring procedure based on the available information (see Clause 4)
— Remarks
Brief additional information about e.g. similar measuring procedures, special interferences, reasons
for rating
4 Evaluation of measuring procedures
4.1 General
Evaluation and rating is based on the requirements given in EN 482 and either one of EN 838, EN 1076,
EN 13890, EN 13936 and/or the EN 13205 series, as far as applicable.
4.2 Rating
For the measuring procedures three method categories are defined:
— Category A
The measuring procedure meets the general requirements specified in EN 482 and the specific
requirements given in EN 838, EN 1076, EN 13890, EN 13936 and/or the EN 13205 series, as far as
applicable.
— Category B
The validation data are incomplete but the measuring procedure has the potential to meet the
general requirements of EN 482 and the specific requirements given in EN 838, EN 1076,
EN 13890, EN 13936 and/or the EN 13205 series, as far as applicable.
NOTE 1 – Usually, only methods assigned “A” or “B” will appear in the method lists.
— Category C
The measuring procedure has not the potential to meet the general requirements of EN 482.
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NOTE 2 – A measuring procedure assigned category “C” is normally disregarded. However, if no measuring
procedure assigned to category “A” or category “B” is available a category “C” method is included.
Table 2 gives the criteria used for the rating of the methods/measuring procedures.
Table 2— Criteria for method rating of measuring procedures
Criteria Requirement Rationale for rating
Origin of the method Measuring procedure published Required
in an „accepted source“
See Table 1.
Structure of the method ISO 78-2 Preferable.
description
EN 482:2012+A1:2015, Annex B If possible, the main clauses
should be presented.
Sampling conditions Description of sampling Required
conditions
For aerosol sampling the
Sampler, flow rate, sampler shall fulfil the
recommended air volume or requirements for the type of
sampling time aerosol according to the
EN 13205 series (inhalable or
respirable fraction).
Normative references:
EN 689, EN 838, EN 1076,
EN 13936, EN ISO 13137
Transportation and storage Description of sample transport Required for critical samples.
or sample stability
For critical samples detailed
transportation and storage
condition need to be defined.
For non-critical samples a short
statement should be given.
Sample preparation Description of sample handling Required
Analytical technique Description of the analytical Required
conditions
Specified measuring range / 0,1 LV to 2 LV according to Required
Validated working range EN 482:2012+A1:2015
Specified measuring range / Specified measuring range / Preferable
Validated working range validated working range larger
than required according to
EN 482:2012+A1:2015
Expanded uncertainty 0,1 LV to 0,5 LV ≤ 50 % Required
0,5 LV to 2,0 LV ≤ 30 % In most cases uncertainty only
for sample clean-up and
according to
analytical steps will be available.
EN 482:2012+A1:2015
Limit of quantification or lowest LOQ per sample (e.g. µg per Required
concentration of the validated filter) and LOQ calculated for the
working range verified for the recommended air volume,
method where appropriate
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Criteria Requirement Rationale for rating
Method bias Information necessary Required
The bias is very often only
available for analytical steps.
Sampler bias For aerosol sampling, estimated Preferable
data for samplers are used for
uncertainty calculation (e.g. see
EN 13890:2009, B.3.4)
Sampling efficiency Information about sampling Preferable
efficiency is needed.
According to
EN 482:2012+A1:2015, B.3.1 the
sampling efficiency of vapours
and gases is assumed to be
100 % for pumped samplers.
For diffusive samplers sampling
efficiency can be calculated
according to EN 838:2010, B.3.
For aerosol sampling, generated
data for samplers are used for
uncertainty calculation
(see EN 13890:2009, B.3.4)
Repeatability Minimum six repeat Required
measurements under defined
conditions at three
different concentrations.
Recovery How was the recovery Information needed, e.g. use of a
determined? test gas atmosphere
Selectivity Information needed Required
Experiments to interferences
described or lucid explanations
given about the selectivity (e.g.
the method is highly selective
because the measuring
wavelength is selective).
Analytical precision Precision data for the analytical Preferable
steps stated in the method
(mostly RSD)
Method precision Method precision data stated in Required, when no expanded
the method, e.g. when a test gas uncertainty is given.
atmosphere for method
validation was used.
Environmental conditions Information on relative Required
humidity, temperature,
pressure effects needs to be
given, when appropriate
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Criteria Requirement Rationale for rating
Sampler capacity Information on sampler Required
capacity or breakthrough
For samplers with limited
volume is needed
capacity (e.g. sampling tubes,
impregnated filters)
Similar methods Very often similar methods Preferable.
(similar sampling, sample
Consideration of existing similar
preparation and analytical
methods can be helpful if they
technique) are available from
contain sufficient validation
the different sources for
data.
analytical methods
Unambiguity Information needed Preferable
4.3 Downgrade of a rating
Even measuring procedures from accepted sources of methods do not always fulfil all requirements
specified in EN 482. For example, the older IFA methods (published before 2006) are mainly very short
and do not fulfil the requirement for “Structure of the method description” and Metropol methods very
often include insufficient validation data. The indicative rating for such methods cannot be better than
“B”. In such instance, a special phrase appears in the method list “remarks” (see Table 3).
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Table 3 — Downgrade of a rating
Criteria Phrase Action
Short method description only Brief method description Downgrade to “B”
or some main clauses from
ISO 78-2 or
EN 482:2012+A1:2015, Annex B
are missing
No or insufficient method No (or insufficient) performance Downgrade to “B”
performance data data published in the method
(example: Metropol methods)
Sampler does not sample the Inhalable sampler not used Downgrade to “B”
inhalable aerosol fraction
or, where applicable, (example: cassette filter holder
used)
Inhalable sampler not used, but
wall deposits analysed
For critical substances: — Downgrade to “B”
No information about transport
and sample stability on storage
available
No information about the — Downgrade to “B”
importance of blank values in
case of critical substances with
ubiquitous sources available
(e.g. Chlorides, Sodium, Calcium)
No information about the — Downgrade to “B”
influence of relative humidity on
gas and vapour samples
available.
Method not practicable Method not practicable Downgrade to “B”
(example: laboratory methods
for gases like CO)
Older methods using techniques Old method, no longer state of Downgrade to “B”
which are no longer up-to-date the art
(example: photometric method
for ammonia)
4.4 Expanded uncertainty
The expanded uncertainty is calculated according to EN 482. For calculation of the expanded
uncertainty it is necessary to consider all random and non-random uncertainty components. Most of the
uncertainty components are unknown (e.g. instrumental drift) or included in the analytical uncertainty
(e.g. sample dilution).
EN 482, EN 838, EN 1076, EN 13890, EN 13936 as well as the EN 13205 series give consensus values for
some uncertainty components for calculations of the expanded uncertainty or refer on them.
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SIST-TP CEN/TR 17055:2017
CEN/TR 17055:2017 (E)
Annex A
(inform
...