Workplace exposure - Measurement of dustiness of bulk materials that contain or release respirable NOAA or other respirable particles - Part 2: Rotating drum method

This European Standard provides the methodology for measuring the dustiness of bulk materials that contain or release nano-objects or submicrometer particles, under standard and reproducible conditions and specifies for that purpose the rotating drum method.
In addition, this European Standard specifies the selection of instruments and devices and the procedures for calculating and presenting the results. It also gives guidelines on the evaluation and reporting of the data.
The methodology described in this European Standard enables
a)   the measurement of the respirable, thoracic and inhalable dustiness mass fractions,
b)   the measurement of the number-based dustiness index of respirable particles in the size range from about 10 nm to 1 000 nm,
c)   the measurement of the number-based emission rate of respirable particles in the size range from about 10 nm to 1 000 nm,
d)   the measurement of the number-based size distribution of the released aerosol in the size range from about 10 nm to 10 µm, and
e)   the collection of released airborne particles in the respirable fraction for subsequent observations and analysis by analytical electron microscopy.
This European Standard is applicable to the testing of a wide range of bulk materials including powders, granules or pellets containing or releasing nano-objects or submicrometer particles in either unbound, bound uncoated and coated forms.
NOTE 1   Currently no number-based classification scheme in terms of dustiness indices or emission rates have been established. Eventually, when a large number of measurement data has been obtained, the intention is to revise this European Standard and to introduce such a classification scheme, if applicable.
NOTE 2   The method specified in this European Standard has not been investigated for the measurement of the dustiness of bulk materials containing nanofibres and nanoplates in terms of number-based dustiness indices or emission rates. However, there is no reason to believe that the number-based dustiness indices or emission rates could not be measured with the rotating drum using the set-up described in this European Standard.

Exposition am Arbeitsplatz - Messung des Staubungsverhaltens von Schüttgütern, die Nanoobjekte oder Submikrometerpartikel enthalten oder freisetzen - Teil 2: Verfahren mit großer rotierender Trommel

Diese Europäische Norm enthält die Methodik für die Messung des Staubungsverhaltens von Schüttgütern, die Nanoobjekte oder Partikel im Submikrometerbereich enthalten oder unter wiederholbaren und Standardbedingungen freisetzen, und legt zu diesem Zweck das Verfahren mit rotierender Trommel fest.
Darüber hinaus legt diese Europäische Norm die Auswahl der Instrumente und Vorrichtungen sowie die Verfahren für die Berechnung und Präsentation der Ergebnisse fest. Des Weiteren enthält die Norm eine Anleitung für die Auswertung und Angabe der Daten.
Die in dieser Europäischen Norm festgelegte Methodik ermöglicht
a)   die Messung des Massenanteils an alveolengängigem, thorakalem und einatembarem Staub,
b)   die Messung des zahlenbasierten Staubindex alveolengängiger Partikel im Größenbereich zwischen ungefähr 10 nm und 1 000 nm,
c)   die Messung der zahlenbasierten Emissionsrate alveolengängiger Partikel im Größenbereich zwischen ungefähr 10 nm und 1 000 nm,
d)   die Messung der zahlenbasierten Größenverteilung des freigesetzten Aerosols im Größenbereich zwischen ungefähr 10 nm und 10 µm und
e)   die Sammlung freigesetzter Schwebstoffe in der alveolengängigen Fraktion für anschließende Beobachtungen und Analysen durch analytische Elektronenmikroskopie.
Diese Europäische Norm gilt für die Prüfung einer Vielzahl unterschiedlicher Schüttgüter einschließlich Pulver, Granulate oder Pellets, die Nanoobjekte oder Partikel im Submikrometerbereich in ungebundener, gebundener und unbeschichteter und beschichteter Form enthalten oder freisetzen.
ANMERKUNG 1   Bisher wurde noch kein zahlenbasiertes Klassifizierungsschema im Hinblick auf Staubungsindizes oder Emissionsraten entwickelt. Schließlich, wenn eine große Anzahl an Messdaten vorliegt, ist beabsichtigt, diese Europäische Norm zu revidieren und ein solches Klassifizierungsschema einzuführen.
ANMERKUNG 2   Das in dieser Europäischen Norm festgelegte Verfahren wurde nicht für die Messung des Staubungsverhaltens von Schüttgütern mit Nanofasern und Nanoplättchen in Bezug auf die zahlenbasierten Staubungs-indizes oder Emissionsraten untersucht. Es besteht jedoch kein Grund zu der Annahme, dass die zahlenbasierten Staubungsindizes oder Emissionsraten nicht durch das Verfahren mit rotierender Trommel unter Verwendung des in dieser Europäischen Norm festgelegten Versuchsaufbaus gemessen werden können.

Exposition sur les lieux de travail - Mesurage du pouvoir de resuspension des matériaux en vrac contenant ou émettant des nano-objets et leurs agrégats et agglomérats (NOAA) ou autres particules en fraction alvéolaire - Partie 2: Méthode du tambour rotatif

Le présent document décrit la méthodologie permettant de mesurer le pouvoir de resuspension de matériaux en vrac contenant ou émettant des NOAA ou autres particules en fraction alvéolaire dans des conditions normalisées et reproductibles et spécifie, à cette fin, le but de la méthode du tambour rotatif.
Le présent document spécifie le choix des instruments et dispositifs ainsi que les procédures de calcul et d’expression des résultats. Il fournit également des lignes directrices concernant l’évaluation et la consignation des données.
La méthodologie décrite dans le présent document permet :
a)   le mesurage des fractions massiques des poussières alvéolaires, thoraciques et inhalables ;
b)   le mesurage de l’indice du pouvoir de resuspension en nombre de particules alvéolaires dans la plage granulométrique comprise entre environ 10 nm et 1 µm ;
c)   le mesurage du taux d’émission en nombre de particules alvéolaires dans la plage granulométrique comprise entre environ 10 nm et 1 µm ;
d)   le mesurage de la distribution granulométrique en nombre de particules d’aérosol libérées dans la plage granulométrique comprise entre environ 10 nm et 10 µm ;
e)   la collecte des particules en suspension dans l’air dans la fraction alvéolaire pour des observations et une analyse supplémentaires par microscopie électronique.
NOTE 1   La plage granulométrique décrite ci-dessus a été établie sur la base de l’équipement utilisé au cours des recherches préalables à la normalisation [4].
Le présent document est applicable aux essais relatifs à une gamme étendue de matériaux en vrac, y compris des matériaux granulaires, en poudre ou sous forme de pastilles contenant ou émettant des NOAA ou autres particules en fraction alvéolaire sous formes revêtues, non revêtues, liées et non liées.
NOTE 2   Aucun système de classification basé sur le nombre en termes d’indices de pouvoir de resuspension ou de taux d’émission n’a encore été établi. Dès lors que des données de mesure seront disponibles en grand nombre, il est prévu de réviser le présent document et d’introduire un tel système de classification, le cas échéant.
NOTE 3   La méthode spécifiée dans le présent document n’a pas été conçue pour le mesurage du pouvoir de resuspension des matériaux en vrac contenant des nanofibres et des nanofeuillets en fonction des indices de pouvoir de resuspension ou des taux d’émission en nombre. Toutefois, il n’y a aucune raison de penser que les indices de pouvoir de resuspension ou les taux d’émission en nombre ne peuvent pas être mesurés par la méthode du tambour rotatif utilisant le montage d’essai décrit dans le présent document.

Izpostavljenost na delovnem mestu - Meritve prašnosti razsutih materialov, ki vsebujejo ali sproščajo respirabilne nanopredmete ter njihove agregate in aglomerate (NOAA) in druge respirabilne delce - 2. del: Metoda z vrtečim bobnom

Ta evropski standard določa metodologijo za merjenje prašnosti razsutih materialov, ki vsebujejo ali sproščajo nanopredmete ali submikrometrske delce v standardnih in ponovljivih pogojih, ter za ta namen določa metodo z vrtečim bobnom.
Poleg tega navaja ta evropski standard tudi izbiro instrumentov in naprav ter postopke za izračun in predstavitev rezultatov. Podaja tudi smernice za vrednotenje in poročanje podatkov.
Metodologija, ki je opisana v tem evropskem standardu, omogoča:
a)   merjenje masnih deležev pri respirabilni, torakalni in inhalabilni prašnosti,
b)   merjenje indeksa prašnosti respirabilnih delcev na podlagi števila v razponu velikosti od približno 10 nm to 1000 nm,
c)   merjenje stopnje emisij respirabilnih delcev na podlagi števila v razponu velikosti od približno 10 nm to 1000 nm,
d)   merjenje porazdelitve velikosti sproščenega aerosola na podlagi števila v razponu velikosti od približno 10 nm to 10 µm,
e)   zbiranje sproščenih lebdečih delcev v respirabilnih deležih za nadaljnje opazovanje in analizo z analitsko elektronsko mikroskopijo.
Ta evropski standard se uporablja za preskušanje širokega nabora razsutih materialov, vključno s praški, granulami in peleti, ki vsebujejo ali sproščajo nanopredmete ali submikrometrske delce v nevezani, vezani, prevlečeni ali neprevlečeni obliki.
OPOMBA 1:   Za indekse prašnosti ali stopnje emisij trenutno še ni vzpostavljena nobena klasifikacijska shema na podlagi števil. Ko bo sčasoma pridobljenih veliko merilnih podatkov, je predvidena revizija tega evropskega standarda in uvedba take klasifikacijske sheme, če bo to ustrezno.
OPOMBA 2:   Metoda, ki je navedena v tem evropskem standardu, še ni bila preiskana za merjenje prašnosti razsutih materialov, ki vsebujejo nanovlakna in nanoplošče v smislu indeksov prašnosti ali stopenj emisij na podlagi števil. Vendar ni razloga za domnevo, da indeksov prašnosti ali stopenj emisij ni mogoče izmeriti na podlagi števil z vrtečim bobnom in pripravo, opisano v tem evropskem standardu.

General Information

Status
Published
Public Enquiry End Date
04-Feb-2018
Publication Date
25-Jun-2019
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
13-Jun-2019
Due Date
18-Aug-2019
Completion Date
26-Jun-2019

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SLOVENSKI STANDARD
SIST EN 17199-2:2019
01-september-2019
Izpostavljenost na delovnem mestu - Meritve prašnosti razsutih materialov, ki
vsebujejo ali sproščajo respirabilne nanopredmete ter njihove agregate in
aglomerate (NOAA) in druge respirabilne delce - 2. del: Metoda z vrtečim bobnom
Workplace exposure - Measurement of dustiness of bulk materials that contain or

release respirable NOAA or other respirable particles - Part 2: Rotating drum method

Exposition am Arbeitsplatz - Messung des Staubungsverhaltens von Schüttgütern, die

Nanoobjekte oder Submikrometerpartikel enthalten oder freisetzen - Teil 2: Verfahren mit

großer rotierender Trommel

Exposition sur les lieux de travail - Mesurage du pouvoir de resuspension des matériaux

en vrac contenant ou émettant des nano-objets et leurs agrégats et agglomérats (NOAA)

ou autres particules en fraction alvéolaire - Partie 2: Méthode du tambour rotatif

Ta slovenski standard je istoveten z: EN 17199-2:2019
ICS:
13.040.30 Kakovost zraka na delovnem Workplace atmospheres
mestu
SIST EN 17199-2:2019 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 17199-2:2019
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SIST EN 17199-2:2019
EN 17199-2
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2019
EUROPÄISCHE NORM
ICS 13.040.30
English Version
Workplace exposure - Measurement of dustiness of bulk
materials that contain or release respirable NOAA or other
respirable particles - Part 2: Rotating drum method

Exposition sur les lieux de travail - Mesurage du Exposition am Arbeitsplatz - Messung des

pouvoir de resuspension des matériaux en vrac Staubungsverhaltens von Schüttgütern, die

contenant ou émettant des nano-objets et leurs Nanoobjekte oder Submikrometerpartikel enthalten

agrégats et agglomérats (NOAA) ou autres particules oder freisetzen - Teil 2: Verfahren mit großer

en fraction alvéolaire - Partie 2: Méthode du tambour rotierender Trommel
rotatif
This European Standard was approved by CEN on 8 February 2019.

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, 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: Rue de la Science 23, B-1040 Brussels

© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 17199-2:2019 E

worldwide for CEN national Members.
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SIST EN 17199-2:2019
EN 17199-2:2019 (E)
Contents Page

European foreword ....................................................................................................................................................... 4

Introduction .................................................................................................................................................................... 5

1 Scope .................................................................................................................................................................... 6

2 Normative references .................................................................................................................................... 6

3 Terms and definitions ................................................................................................................................... 7

4 Symbols and abbreviations ......................................................................................................................... 7

5 Principle ............................................................................................................................................................. 8

6 Equipment ......................................................................................................................................................... 9

6.1 Test apparatus for the determination of the inhalable, thoracic and respirable

dustiness mass fractions .............................................................................................................................. 9

6.2 Test apparatus............................................................................................................................................... 10

6.2.1 General ............................................................................................................................................................. 10

6.2.2 Rotating drum ............................................................................................................................................... 12

6.2.3 Isokinetic flow splitter ............................................................................................................................... 12

6.2.4 Conductive or steel tubing ........................................................................................................................ 13

6.2.5 Cyclone for the respirable dust fraction or impactor pre-selector ............................................ 13

6.2.6 Direct-reading time-resolving aerosol instrument for particle number

concentration, with a detectable particle size range from 10 nm to 1 µm .............................. 13

6.2.7 Direct-reading time- and size-resolving aerosol instrument for time-averaged

number-based particle size distribution ............................................................................................. 13

6.2.8 Aerosol sampler for analytical electron microscopy analysis ..................................................... 14

7 Requirements ................................................................................................................................................ 14

7.1 General ............................................................................................................................................................. 14

7.2 Engineering control measures ................................................................................................................ 14

7.3 Conditioning of the test material ............................................................................................................ 15

7.4 Conditioning of the test equipment ....................................................................................................... 15

8 Preparation .................................................................................................................................................... 15

8.1 Test sample .................................................................................................................................................... 15

8.2 Moisture content of the test material ................................................................................................... 15

8.3 Bulk density of the test material ............................................................................................................ 15

8.4 Preparation of test apparatus ................................................................................................................. 15

8.5 Aerosol instruments and aerosol samplers........................................................................................ 16

9 Test procedure .............................................................................................................................................. 16

10 Evaluation of data ........................................................................................................................................ 18

10.1 Respirable, thoracic and inhalable dustiness mass fraction ........................................................ 18

10.2 Number-based dustiness index, number-based emission rate and modal

aerodynamic equivalent diameters of the number-based particle size distribution ......... 19

10.2.1 General ............................................................................................................................................................. 19

10.2.2 Number-based dustiness index ............................................................................................................... 19

10.2.3 Number-based emission rate ................................................................................................................... 19

10.2.4 Modal aerodynamic equivalent diameters of the number-based particle size

distribution .................................................................................................................................................... 20

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SIST EN 17199-2:2019
EN 17199-2:2019 (E)

10.3 Morphological and chemical characterisation of the particles .................................................... 21

11 Test report ...................................................................................................................................................... 21

Annex A (informative) Example of some parts of the rotating drum apparatus ................................. 23

Bibliography ................................................................................................................................................................. 24

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SIST EN 17199-2:2019
EN 17199-2:2019 (E)
European foreword

This document (EN 17199-2:2019) 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 September 2019 and conflicting national standards

shall be withdrawn at the latest by September 2019.

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.

This document has been prepared under a mandate given to CEN by the European Commission and the

European Free Trade Association.

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, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
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SIST EN 17199-2:2019
EN 17199-2:2019 (E)
Introduction

Dustiness measurement and characterization provide users (e.g. manufacturers, producers,

occupational hygienists and workers) with information on the potential for dust emissions when the

bulk material is handled or processed in workplaces. They provide the manufacturers of bulk materials

containing NOAA with information that can help to improve their products and reduce their dustiness.

It allows the users of the bulk materials containing NOAA to assess the controls and precautions

required for handling and working with the material and the effects of pre-treatment (e.g. modify

surface properties or chemistry). It also allows the users to select less dusty products, if available. The

particle size distribution of the aerosol and the morphology and chemical composition of its particles

can be used by occupational hygienists, scientists and regulators to further characterize the aerosol in

terms of particle size distribution and chemical composition and to thus aid users to evaluate and

control the health risk of airborne dust.

This document gives details on the design and operation of the rotating drum method that measures the

dustiness of bulk materials that contain or release respirable NOAA or other respirable particles in

terms of dustiness indices or emission rates. Dustiness indices as well as emission rates can be

number-based or mass-based. In addition, the test method characterizes the released aerosol by

measuring the particle size distribution using direct-reading aerosol instruments and collects samples

for off-line analysis (as required) for their morphology and chemical composition. This test uses the

same dust generation method as EN 15051-2. The determination of the health-related dustiness mass

fractions of the released dust from a bulk material containing NOAA is carried out according to

EN 15051-1 and EN 15051-2, an experimental set-up different from the one used to determine the

number-based dustiness index and the number-based emission rate.

The rotating drum method is useful for addressing the ability of bulk materials including nanomaterials

(in powder form), to release airborne particles (aerosol) during agitation, the so-called dustiness.

The rotating drum method has been designed to simulate workplace scenarios and to represent general

bulk material handling processes, including processes where bulk material is tipped, poured, mixed,

scooped, dropped or similar, either mechanically or by hand.

The rotating drum method presented here differs from the continuous drop, the small rotating drum

and the vortex shaker methods presented in EN 17199-3 [1], EN 17199-4 [2] and EN 17199-5 [3]

respectively. The rotating drum and small rotating drum methods perform, both, repeated pouring or

agitation of a bulk material. The continuous drop method simulates continuous feed of a bulk material

while the vortex shaker method simulates vigorous agitation of a bulk material.

This document was developed based on the results of pre-normative research [4]. This project

investigated the dustiness of ten bulk materials (including nine bulk nanomaterials) with the intention

to test as wide a range of bulk materials as possible in terms of magnitude of dustiness, chemical

composition and primary particle size distribution as indicated by a large range in specific surface area.

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SIST EN 17199-2:2019
EN 17199-2:2019 (E)
1 Scope

This document provides the methodology for measuring the dustiness of bulk materials that contain or

release respirable NOAA or other respirable particles, under standard and reproducible conditions and

specifies for that purpose the rotating drum method.

This document specifies the selection of instruments and devices and the procedures for calculating and

presenting the results. It also gives guidelines on the evaluation and reporting of the data.

The methodology described in this document enables

a) the measurement of the respirable, thoracic and inhalable dustiness mass fractions,

b) the measurement of the number-based dustiness index of respirable particles in the particle size

range from about 10 nm to about 1 µm,

c) the measurement of the number-based emission rate of respirable particles in the particle size

range from about 10 nm to about 1 µm,

d) the measurement of the number-based particle size distribution of the released aerosol in the

particle size range from about 10 nm to about 10 µm, and

e) the collection of released airborne particles in the respirable fraction for subsequent observations

and analysis by analytical electron microscopy.

NOTE 1 The particle size range described above is based on the equipment used during the pre-normative

research [4].

This document is applicable to the testing of a wide range of bulk materials including powders, granules

or pellets containing or releasing respirable NOAA or other respirable particles in either unbound,

bound uncoated and coated forms.

NOTE 2 Currently no number-based classification scheme in terms of dustiness indices or emission rates have

been established. Eventually, when a large number of measurement data has been obtained, the intention is to

revise this document and to introduce such a classification scheme, if applicable.

NOTE 3 The method specified in this document has not been investigated for the measurement of the dustiness

of bulk materials containing nanofibres and nanoplates in terms of number-based dustiness indices or emission

rates. However, there is no reason to believe that the number-based dustiness indices or emission rates could not

be measured with the rotating drum method using the set-up described in this document.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

CEN ISO/TS 80004-2, Nanotechnologies - Vocabulary - Part 2: Nano-objects (ISO/TS 80004-2)

EN 481, Workplace atmospheres - Size fraction definitions for measurement of airborne particles

EN 1540, Workplace exposure - Terminology

EN 13205-2, Workplace exposure - Assessment of sampler performance for measurement of airborne

particle concentrations - Part 2: Laboratory performance test based on determination of sampling

efficiency
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SIST EN 17199-2:2019
EN 17199-2:2019 (E)

EN 15051-1, Workplace exposure - Measurement of the dustiness of bulk materials - Part 1: Requirements

and choice of test methods

EN 15051-2, Workplace exposure - Measurement of the dustiness of bulk materials - Part 2: Rotating drum

method

EN 16897, Workplace exposure - Characterization of ultrafine aerosols/nanoaerosols - Determination of

number concentration using condensation particle counters

EN 17199-1, Workplace exposure - Measurement of dustiness of bulk materials that contain or release

respirable NOAA or other respirable particles - Part 1: Requirements and choice of test methods

ISO 27891, Aerosol particle number concentration - Calibration of condensation particle counters

3 Terms and definitions

For the purposes of this document, the terms and definitions given in EN 1540, EN 15051-1,

CEN ISO/TS 80004-2 and EN 17199-1 apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
4 Symbols and abbreviations
AES Atomic Emission Spectroscopy
CPC Condensation Particle Counter
d A lower particle size at which the counting or sampling efficiency is 50 %
DEMC Differential Electrical Mobility Classifier
Electrical Low Pressure Impactor
ELPI
EM Electron Microscopy
HEPA High Efficienty Particulate Arrestance
ICP Inductively Coupled Plasma
MS Mass Spectrometry
NOAA Nano-objects, and their aggregates and agglomerates > 100 nm
RD Rotating Drum
RH Relative Humidity
TEM Transmission Electron Microscopy
XRF X-ray fluorescence

1) ELPI is the trade name or trademark of a product supplied by Dekati. This information is given for the

convenience of users of this European Standard and does not constitute an endorsement by CEN of the product

named. Equivalent products may be used if they can be shown to lead to the same results.

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SIST EN 17199-2:2019
EN 17199-2:2019 (E)
5 Principle

The rotating drum method described in this document measures the dustiness of bulk materials in

terms of
— the respirable, thoracic and inhalable dustiness mass fractions,
— the number-based dustiness index, and
— the number-based emission rate.

In addition, this document describes the procedures by which the aerosols can be further characterized

in terms of their particle size distributions and the morphology and chemical composition of their

airborne particles.

The sampling for the purpose of and the execution of qualitative or quantitative analysis of the

morphology and chemical composition of the collected airborne particles are described. Performing

these analyses is optional but can provide confirmation of the sizes of the particles generated and

complementary information to the time-resolving instruments.
Table 1 provides
— an overview of the different measurands,
— information on whether determining these measurands is mandatory or not, and
— the aerosol instruments and sampling devices needed to determine a measurand.

Table 1 — Measurand, aerosol instrument/sampling device and associated recommendations

for the rotating drum method
Method/device specific to
Measurand (unit) Mandatory/optional
measurand
Set of metal foams and a filter
Respirable, thoracic and inhalable
(separate testing according to Mandatory
dustiness mass fraction (mg/kg)
EN 15051-1 and EN 15051-2)
Number-based dustiness index of
respirable particles in the particle
Mandatory
size range from about 10 nm to
about 1 µm (1/mg)
Condensation Particle Counter
(CPC)
Number-based average emission
rate of respirable particles in the
Mandatory
particle size range from about
10 nm to about 1 µm (1/mg·s)
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SIST EN 17199-2:2019
EN 17199-2:2019 (E)
Method/device specific to
Measurand (unit) Mandatory/optional
measurand
Number of modes of the time-
averaged number-based particle Mandatory
size distribution as dN/dlogD (-)
Time- and size-resolving
Modal aerodynamic equivalent
instrument covering the
diameters corresponding to the
particle size range from about
highest mode (M1 ) and to the
10 nm up to about 10 µm
second highest mode (M2 ) of the Mandatory
time-averaged number-based
particle size distribution as
dN/dlogD (µm)
Number of modes of the time-
averaged mass-based particle Optional
size distribution as dM/dlogD (-)
Modal aerodynamic equivalent
Cascade impactor covering the
diameters corresponding to the
particle size range from about
highest mode (M1 ) and to the
10 nm up to about 10 µm
second highest mode (M2 ) of Optional
the time-averaged mass-based
particle size distribution as
dM/dlogD (µm)
Optional
TEM-grid holder equipped with
Carbon film can be analysed by
porous carbon film TEM-grid
TEM
Morphological and chemical
characterization of the particles
Optional
A set of metal foams followed
including NOAA
Filter can be quantitatively
by a filter according to
analysed by XRF, ICP-AES or ICP-
EN 15051-2
MS.

NOTE The particle size range described above is based on the equipment used during the pre-normative

research.

The determination of the inhalable, thoracic and respirable dustiness mass fractions of the released

dust from a bulk material shall be carried out according to EN 15051-1 and EN 15051-2. The

experimental set-up of that method is different from the one used to determinate the number-based

dustiness index and the emission rate.
6 Equipment

6.1 Test apparatus for the determination of the inhalable, thoracic and respirable

dustiness mass fractions

The test apparatus and test methods specified in EN 15051-1 and EN 15051-2 shall be used to

determine the inhalable, thoracic and respirable dustiness mass fractions.
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SIST EN 17199-2:2019
EN 17199-2:2019 (E)
6.2 Test apparatus
6.2.1 General
The test apparatus consists of
a) an especially designed steel drum with an inlet filter,

b) an outlet stage consisting of an isokinetic splitter connected to a set of instruments and sampling

device(s),
c) a set of rollers,
d) a timer, and
e) a drive motor.
An example of the test set-up is shown in Figure 1.
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SIST EN 17199-2:2019
EN 17199-2:2019 (E)
Key

1 HEPA-filtered or ultra-HEPA-filtered air 12 additional direct reading instrument or

additional sampling device; alternatively, a
filter and a pump can be used
2 rotating drum designed according to 13 cyclone or impactor preselector
EN 15051-2
3 isokinetic flow splitter 14 additional direct reading instrument or
additional sampling device; alternatively, a
filter and a pump can be used
4 impactor preselector with a d cut-off of 15 HEPA filter
approximately 11 µm
5 ELPI 16 mass flow controller
6 respirable cyclone 17 “make-up air” pump
7 flow splitter Q flow rate rotating drum

8 aerosol sampler for electron microscopy QA flow rate in part A of the test set-up

analysis
9 mass flow controller Q flow rate in part B of the test set-up
10 sampling pump Q flowrate in part C of the test set-up

11 time-resolved aerosol instrument for particle QD flow rate in part D of the test set-up

number concentration (CPC)
Figure 1 — Example of the test set-up for the rotating drum method
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SIST EN 17199-2:2019
EN 17199-2:2019 (E)
The flow rate Q for each tubing, annotated in Figure 1, shall be set as follows:
— Q is 10 l/min;
— Q is 4,2 l/min;
— Q is 0,3 l/min;
— Q is 0,7 l/min;
— Q is 3,2 l/min;
— Q is 4,2 l/min, if a 4,2 l/min respirable cyclone is used;
— Q = 38 – (Q + Q + Q );
D A B C
— Q = Q + Q + Q + Q .
RD A B C D

NOTE 1 The respirable cyclone operating at 4,2 l/min is not mandatory. The type of respirable cyclone or

impactor preselector will depend on the type of instruments connected to this line. Alternatively, a sampling

device can be used on its own.

NOTE 2 Mass flow controllers are not mandatory. They can ensure that a constant flow is provided to the drum.

6.2.2 Rotating drum

The rotating drum has the same characteristics as the one specified in EN 15051-2. The main body of

the drum has a diameter of 300 mm and is made of stainless steel. It has a volume of 38 l. When

positioned on the rollers, it rotates at four revolutions per minute. The main body of the drum is

equipped with eight longitudinal vanes to lift and drop a known volume of the nanomaterial (the dust

generation section). The stainless steel vanes (230 mm length and 25 mm width) are fixed

longitudinally to the internal walls of the drum and point radially inwards towards the centre of the

drum.

The inlet air shall be filtered with a HEPA-filter so that a background of less than 20 particles/cm is

achieved.

NOTE This can be measured using a condensation particle counter in the particle size range from 10 nm to

about 1 µm.

The emitted dust is drawn from the drum to the time-resolving instruments and sampling devices using

an isokinetic splitter (see 6.2.3) and conductive or steel tubing (see 6.2.4).

The main pump hosted in the set of rollers is disconnected to the drum. The outlet stage of the drum

remains empty and a spacer is used in place of the foams and filter system described in EN 15051-2.

The inlet and outlet of the drum are assembled to the appropriate end of the drum.

The outlet of the drum is connected, using an isokinetic splitter, to the instruments, sampling device(s)

and an additional “make-up air” pump (protected by a filter). The “make-up air” pump ensures that a

total airflow of 38 l/min is achieved through the drum.
6.2.3 Isokinetic flow splitter

The flow splitter connecting the drum to the instruments and devices shall be isokinetic.

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SIST EN 17199-2:2019
EN 17199-2:2019 (E)
6.2.4 Conductive or steel tubing

The tubing connecting the flow splitter to the instruments shall have an inner diameter of 0,41 cm

except for the line connecting the flow splitter to the direct reading number-based low pressure cascade

impactor, where it shall have a diameter of 0,635 cm.

To minimize particle losses in sampling lines that convey the released aerosol to the measuring

instruments and sampling devices, tube lengths and bend in tubing shall be kept to a minimum.

To minimize particles losses due to electrostatic effect in sampling lines that convey the released

aerosol to the measuring instruments and sampling devices, carbon impregnated conductive flexible

tubing shall be employed.
6.2.5 Cyclone for the respirable dust fraction or impactor pre-selector

A cyclone for the respirable dust fraction or an impactor pre-selector shall be placed at the inlet of the

time-resolving instruments and sampling devices to remove the larger particles and prevent overloads.

The respirable cyclone acts as a particle size selector for the CPC direct-reading instrument and the

aerosol sampler fo
...

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