The purpose of this document is to allow users to determine a sizeweighted fine fraction by the
sedimentation method. The method in this part uses a liquid sedimentation technique to
separate the fine fraction, which is then analysed for its substance of interest, e.g. crystalline
silica.
Informative annexes within this document describe specific methods for the evaluation of FF for
specific bulk materials.
This document is applicable for bulk materials that contain particles in the size range from 0,1
μm to 125 μm satisfying with the criteria given in this part and Part 3 of the document series. The
current industrial minerals within the scope of this method are: quartz, clay, kaolin, talc, feldspar,
mica, cristobalite, vermiculite, diatomaceous earth, barite and andalusite. The method may be
applicable to other bulk materials, following full investigation and validation.

Charakterisierung von Schüttgütern - Bestimmung einer größengewichteten Feinfraktion und des Anteils an kristallinem Quarz - Teil 2: Sedimentationsverfahren

Dieses Dokument legt die Bestimmung der größengewichteten Feinfraktion (SWFF) und der größengewichteten Feinfraktion von kristallinem Quarz (SWFFCS) in Schüttgütern durch Berechnung fest. Das Dokument legt auch die Annahmen und Voraussetzungen fest, die zu erfüllen sind, damit dieses Verfahren gültig ist.
Der Zweck dieses Dokuments besteht darin, Anwendern die Bewertung von Schüttgütern hinsichtlich deren größengewichteter Feinfraktion und des Gehalts an kristallinem Quarz zu ermöglichen.
ANMERKUNG   Zur Probenvorbereitung und zur Bestimmung von kristallinem Quarz durch Röntgenpulver-diffraktometrie (XRD) und Fourier-Transformations-Infrarot-Spektroskopie (FT IR) siehe EN 17289-1.
Das Berechnungsverfahren ist nur anwendbar, nachdem Experimente gezeigt haben, dass die Ergebnisse genau und durchweg gleich sind oder höher ausfallen als die für dieses spezielle Schüttgut durch Sedimentation erzielten Ergebnisse, wie in EN 17289-3 festgelegt ist.
Ein spezifisches Verfahren zur Bewertung des SWFF für Schüttgüter aus Diatomeenerde ist in Anhang A angegeben. Aufgrund der inneren Porosität von Diatomeenerde, sind die in diesem Dokument enthaltenen allgemeinen Anweisungen angepasst, um die effektive Dichte des Materials zu berücksichtigen.
Dieses Dokument ist für kristallinen Quarz enthaltende Schüttgüter anwendbar, die zur Bewertung der größengewichteten Feinfraktion und des kristallinen Quarzes untersucht und validiert wurden.

Caractérisation des matériaux en vrac - Détermination de la fraction fine pondérée par taille et de la teneur en silice cristalline - Partie 2 : Méthode par calcul

Le présent document spécifie la détermination par calcul de la fraction fine pondérée par taille (SWFF) et de la fraction fine de silice cristalline pondérée par taille (SWFFCS) dans des matériaux en vrac. Le document spécifie également les hypothèses et les conditions préalables à respecter pour que cette méthode soit valable.
L’objectif du présent document est de permettre aux utilisateurs d’évaluer des matériaux en vrac en ce qui concerne leur fraction fine pondérée par taille et leur teneur en silice cristalline.
NOTE   Pour la préparation de l’échantillon et le dosage de la silice cristalline par l’analyse de poudre par diffraction de rayons X (XRD) ou la spectroscopie infrarouge à transformée de Fourier (FT-IR), voir l’EN 17289-1.
La méthode par calcul n’est applicable qu’après avoir démontré, par des expériences, que les résultats sont exacts et constamment supérieurs ou égaux aux résultats obtenus par la méthode par sédimentation, telle que spécifiée dans l’EN 17289-3, pour le matériau en vrac considéré.
Une méthode spécifique pour l’évaluation de la SWFF de matériaux en vrac à base de terre de diatomées est donnée dans l’Annexe A. En raison de la porosité interne des terres de diatomées, les instructions générales données dans le présent document sont adaptées afin de prendre en compte la masse volumique effective du matériau.
Le présent document s’applique aux matériaux en vrac contenant de la silice cristalline, qui ont été entièrement étudiés et validés pour l’évaluation de la fraction fine pondérée par taille et de la silice cristalline.

Karakterizacija razsutih materialov - Določanje velikostno utežene fine frakcije in deleža kristaliničnega kremena - 2. del: Metoda izračuna

General Information

Status
Published
Public Enquiry End Date
04-Mar-2019
Publication Date
11-Jan-2021
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
05-Jan-2021
Due Date
12-Mar-2021
Completion Date
12-Jan-2021

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SLOVENSKI STANDARD
SIST EN 17289-2:2021
01-februar-2021

Karakterizacija razsutih materialov - Določanje velikostno utežene fine frakcije in

deleža kristaliničnega kremena - 2. del: Metoda izračuna

Characterization of bulk materials - Determination of a size-weighted fine fraction and

crystalline silica content - Part 2: Calculation method

Charakterisierung von Schüttgütern - Bestimmung einer größengewichteten Feinfraktion

und des Anteils an kristallinem Quarz - Teil 2: Sedimentationsverfahren

Caractérisation des matériaux en vrac - Détermination de la fraction fine pondérée par

taille et de la teneur en silice cristalline - Partie 2 : Méthode par calcul
Ta slovenski standard je istoveten z: EN 17289-2:2020
ICS:
13.040.30 Kakovost zraka na delovnem Workplace atmospheres
mestu
SIST EN 17289-2:2021 en,fr,de

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

---------------------- Page: 1 ----------------------
SIST EN 17289-2:2021
---------------------- Page: 2 ----------------------
SIST EN 17289-2:2021
EN 17289-2
EUROPEAN STANDARD
NORME EUROPÉENNE
December 2020
EUROPÄISCHE NORM
ICS 13.040.30
English Version
Characterization of bulk materials - Determination of a
size-weighted fine fraction and crystalline silica content -
Part 2: Calculation method

Caractérisation des matériaux en vrac - Détermination Charakterisierung von Schüttgütern - Bestimmung

de la fraction fine pondérée par taille et de la teneur en einer größengewichteten Feinfraktion und des Anteils

silice cristalline - Partie 2 : Méthode par calcul an kristallinem Quarz - Teil 2: Berechnungsverfahren

This European Standard was approved by CEN on 4 October 2020.

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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, 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

© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 17289-2:2020 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN 17289-2:2021
EN 17289-2:2020 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

Introduction .................................................................................................................................................................... 4

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

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

3 Terms and definitions ................................................................................................................................... 6

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

5 Assumptions ...................................................................................................................................................... 7

6 Determination of SWFF and SWFFCS by calculation .......................................................................... 7

Annex A (normative) Determination of the size-weighted fine fraction (SWFF and SWFFCS)

of Diatomaceous Earth (DE) by calculation ........................................................................................... 9

A.1 General ................................................................................................................................................................ 9

A.2 Categories of diatomaceous earth ............................................................................................................. 9

A.3 Equipment and consumables ...................................................................................................................... 9

A.4 Method ................................................................................................................................................................ 9

A.5 Determination of SWFF by calculation ................................................................................................. 11

A.6 Determination of SWFFCS ......................................................................................................................... 12

A.7 Example ........................................................................................................................................................... 12

Bibliography ................................................................................................................................................................. 14

---------------------- Page: 4 ----------------------
SIST EN 17289-2:2021
EN 17289-2:2020 (E)
European foreword

This document (EN 17289-2:2020) 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 June 2021, and conflicting national standards shall be

withdrawn at the latest by June 2021.

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.

According to the CEN-CENELEC Internal Regulations, the national standards organisations of the

following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,

Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,

Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of

North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the

United Kingdom.
---------------------- Page: 5 ----------------------
SIST EN 17289-2:2021
EN 17289-2:2020 (E)
Introduction

A method was developed in the industrial minerals industry for the purpose of determining the “size-

weighted relevant fine fraction” within the bulk material. This document sets out the methods which

can be used to measure and calculate the fine fraction of the bulk material and the fine fraction of the

crystalline silica, in several types of bulk materials. This information provides additional information to

users for their risk assessment and to compare bulk materials. It has been used in the industry and by

institutes previously under the acronym SWeRF. EN 17289 (all parts) is based on that industrial

method and specifies the analytical methods to determine the difference between materials with coarse

quartz and fine quartz, for example, sands versus flour.

As further activities with the material (intentional or otherwise) can change the particle size

distribution, the size-weighted fine fraction can also change. Therefore, the method reports (in terms of

the mass fraction in the bulk material in percent) both, the total crystalline silica (CS) and the estimated

size-weighted fine fraction of CS.

Conventions as specified in EN 481 can be used as input for this document. However, the output of this

document is not related to the respirable fraction at the workplace and cannot be used to replace

workplace exposure measurements.

EN 17289 (all parts) specifies two procedures that can be used to estimate the size-weighted fine

fraction (SWFF) in bulk materials. It also specifies how the SWFF, once separated, can be further

analysed to measure the content of crystalline silica (SWFFCS). The method can be used for comparing

the fine fraction in different bulk samples. EN 17289 (all parts) uses the term fine fraction to indicate

that it does not analyse airborne particles, but it evaluates the proportion of particles in a bulk material

that, based on their particle size, have a potential to be respirable if they were to become airborne.

EN 17289 (all parts) also allows for the size-weighted fine fraction of crystalline silica (SWFFCS)

particles in bulk materials to be evaluated in terms of mass fraction in percent, if the fraction separated

is subsequently analysed by a suitable method.

In a comparison of similar bulk materials, in which the particle size distribution is the only variable, the

SWFF can provide useful information to guide material selection. For example, leaving all other factors

aside, a bulk material with a lower SWFF value can pose less of a risk in terms of potential occupational

exposure. For the actual exposure at the workplace, the handling etc. of the material, will play a major

role.

Concentrations of respirable dust, or respirable crystalline silica (RCS), in the workplace air, resulting

from processing and handling of bulk materials, will depend on a wide variety of factors and these

concentrations cannot be estimated using SWFF or SWFFCS values. SWFF and SWFFCS values are not

intended for workplace exposure assessments as they have no direct relationship with occupational

exposure.

The evaluation of bulk materials using SWFF is complementary to determining the dustiness according

to EN 15051-1 [1].

The difference between EN 17289 (all parts) and EN 15051-1 is that SWFF quantifies the fine fraction in

a bulk material while dustiness quantifies the respirable, thoracic and inhalable dust made airborne

from the bulk material after a specific activity (dustiness characterizes the material with relation to the

workplace atmosphere when working with the bulk material).
---------------------- Page: 6 ----------------------
SIST EN 17289-2:2021
EN 17289-2:2020 (E)

EN 17289 Characterization of bulk materials — Determination of a size-weighted fine fraction and

crystalline silica content consists of the following parts:
— Part 1: General information and choice of test methods;
— Part 2: Calculation method;
— Part 3: Sedimentation method.

NOTE This document is intended for use by laboratory experts who are familiar with FT-IR, XRD methods,

PSD measurements and other analytical procedures. It is not the intention of this document to provide instruction

in the fundamental analytical techniques.
---------------------- Page: 7 ----------------------
SIST EN 17289-2:2021
EN 17289-2:2020 (E)
1 Scope

This document specifies the determination of the size-weighted fine fraction (SWFF) and the size-

weighted fine fraction of crystalline silica (SWFFCS) in bulk materials by calculation. The document also

specifies the assumptions and preconditions to be fulfilled for this method to be valid.

The purpose of this document is to allow users to evaluate bulk materials regarding their size-weighted

fine fraction and crystalline silica content.

NOTE For preparation of the sample and determination of crystalline silica by X-ray Powder Diffractometry

(XRD) or Fourier Transform Infrared Spectroscopy (FT-IR), see EN 17289-1.

The calculation method is applicable only after experiments have shown that the results are accurate

and consistently equal or higher than the results from sedimentation, as specified in EN 17289-3, for

that particular bulk material.

A specific method for the evaluation of the SWFF for diatomaceous earth bulk materials is given in

Annex A. Due to the internal porosity of diatomaceous earth, the general instructions given in this

document are adapted in order to take into account the material’s effective density.

This document is applicable for crystalline silica containing bulk materials which have been fully

investigated and validated for the evaluation of the size-weighted fine fraction and crystalline silica.

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.

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

EN 1540, Workplace exposure — Terminology

EN 17289-1:2020, Characterization of bulk materials — Determination of a size-weighted fine fraction

and crystalline silica content — Part 1: General information and choice of test methods

ISO 1183-1, Plastics — Methods for determining the density of non-cellular plastics — Part 1: Immersion

method, liquid pycnometer method and titration

ISO 13317-1, Determination of particle size distribution by gravitational liquid sedimentation methods —

Part 1: General principles and guidelines

ISO 13317-2, Determination of particle size distribution by gravitational liquid sedimentation methods —

Part 2: Fixed pipette method
ISO 13320, Particle size analysis — Laser diffraction methods
3 Terms and definitions
For the purposes of this document, the terms and
...

SLOVENSKI STANDARD
oSIST prEN 17289-2:2019
01-februar-2019
[Not translated]

Characterization of bulk materials - Determination of a sizeweighted fine fraction and

crystalline silica content - Part 2: Sedimentation method

Charakterisierung von Schüttgütern - Bestimmung einer größengewichteten Feinfraktion

und des Anteils an kristallinem Quarz - Teil 2: Sedimentationsverfahren
Ta slovenski standard je istoveten z: prEN 17289-2
ICS:
13.040.30 Kakovost zraka na delovnem Workplace atmospheres
mestu
oSIST prEN 17289-2:2019 en,fr,de

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

---------------------- Page: 1 ----------------------
oSIST prEN 17289-2:2019
---------------------- Page: 2 ----------------------
oSIST prEN 17289-2:2019
DRAFT
EUROPEAN STANDARD
prEN 17289-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
January 2019
ICS 13.040.30
English Version
Characterization of bulk materials - Determination of a
sizeweighted fine fraction and crystalline silica content -
Part 2: Sedimentation method
Charakterisierung von Schüttgütern - Bestimmung
einer größengewichteten Feinfraktion und des Anteils
an kristallinem Quarz - Teil 2:
Sedimentationsverfahren

This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee

CEN/TC 137.

If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are

aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without

notice and shall not be referred to as a European Standard.
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. prEN 17289-2:2019 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
oSIST prEN 17289-2:2019
prEN 17289-2:2019 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

Introduction .................................................................................................................................................................... 4

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

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

3 Terms and definitions ................................................................................................................................... 6

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

5 Assumptions ...................................................................................................................................................... 7

6 Determination of SWFF and SWFFCS by calculation ............................................................................ 7

Annex A (informative) Determination of the size weighted fine fraction (SWFF) of

Diatomaceous Earth (DE) by calculation ................................................................................................ 9

A.1 General ................................................................................................................................................................ 9

A.2 Categories of diatomaceous earth ............................................................................................................. 9

A.3 Equipment and consumables ...................................................................................................................... 9

A.4 Method ................................................................................................................................................................ 9

A.4.1 Determination of the skeletal density ..................................................................................................... 9

A.4.2 Determination of the intra-particular pore volume and intra-particle porosity ................. 10

A.4.3 Calculation of the effective density ........................................................................................................ 11

A.4.4 Particle size analysis ................................................................................................................................... 11

A.5 Determination of SWFF by calculation ................................................................................................. 11

A.6 Determination of SWFF ........................................................................................................................... 12

A.7 Example ........................................................................................................................................................... 12

Bibliography ................................................................................................................................................................. 13

---------------------- Page: 4 ----------------------
oSIST prEN 17289-2:2019
prEN 17289-2:2019 (E)
European foreword

This document (prEN 17289-2:2019) 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 document is currently submitted to the CEN Enquiry.
---------------------- Page: 5 ----------------------
oSIST prEN 17289-2:2019
prEN 17289-2:2019 (E)
Introduction

A method was developed in the industrial minerals industry for the purpose of determining the “size

weighted relevant fine fraction” within the bulk material. This method provides the necessary

information to the users and allows them to compare bulk materials, by measuring the fine fraction, in

order for them to select the safest materials. It has been used in the industry and by institutes

previously under the acronym SWeRF. EN 17289 (all parts) is based on that industrial method and

describes the analytical methods to determine the difference between materials with coarse quartz and

fine quartz, e.g. sands versus flour.

As further activities with the material (intentional or otherwise) might change the particle size

distribution, the size weighted fine fraction might also change. Therefore, the method reports (in terms

of the mass percentages in the bulk material) both, the total CS and the estimated size weighted fine

fraction of CS.

Conventions as described in EN 481 can be used as input for this document. However, the output of this

document is not related to the respirable fraction and cannot be used for workplace exposure

measurements.

EN 17289 (all parts) describes two procedures that can be used to estimate the size weighted fine

fraction (SWFF) in bulk materials. It also describes how the SWFF, once separated, can be further

analysed to measure the content of crystalline silica (SWFF ). The method can be used for comparing

the fine fraction in different bulk samples. EN 17289 (all parts) uses the term fine fraction to indicate

that it does not analyse airborne particles, but it evaluates the proportion of particles in a bulk material

that, based on their particle size, have a potential to be respirable if they were to become airborne.

EN 17289 (all parts) also allows for the size weighted fine fraction of crystalline silica (SWFF ) particles

in bulk materials to be evaluated in terms of mass fraction in percent, if the fraction separated is

subsequently analysed by a suitable method.

In a comparison of similar bulk materials, in which the particle size distribution is the only variable, the

SWFF can provide useful information to guide material selection. For example, leaving all other factors

aside, a bulk material with a lower SWFF value can pose less of a risk in terms of potential occupational

exposure. For the actual exposure at the workplace, the handling etc of the material, will play a major

role.

Concentrations of respirable dust, or respirable crystalline silica (RCS), in the workplace air, resulting

from processing and handling of bulk materials, will depend on a wide variety of factors and these

concentrations cannot be estimated using SWFF or SWFFcs values. SWFF and SWFFcs values are not to

be used for occupational exposure assessments as they have no relationship with occupational

exposure.

The evaluation of bulk materials using SWFF is complementary to determining the dustiness according

to EN 15051-1 [1].

The difference between EN 17289 (all parts) and EN 15051-1 is that SWFF quantifies the fine fraction in

a bulk material while dustiness quantifies the respirable, thoracic and inhalable dust made airborne

from the bulk material after a specific activity (it characterizes the material with relation to the

workplace atmosphere when working with the bulk material).
---------------------- Page: 6 ----------------------
oSIST prEN 17289-2:2019
prEN 17289-2:2019 (E)

EN 17289 Characterization of bulk materials — Determination of a size-weighted fine fraction and

crystalline silica content consists of the following parts:
— Part 1: General information and choice of test methods;
— Part 2: Calculation method;
— Part 3: Sedimentation method.

Part 1 gives information on how to choose the most appropriate method as well as a guideline for the

determination of crystalline silica. A calculation method based on particle size distribution is described

in Part 2. Part 3 describes a method using sedimentation.
---------------------- Page: 7 ----------------------
oSIST prEN 17289-2:2019
prEN 17289-2:2019 (E)
1 Scope

This document specifies the determination of the size weighted fine fraction (SWFF) and the size

weighted fine fraction of crystalline silica (SWFF ) in bulk materials by calculation. The document also

describes the assumptions and preconditions to be fulfilled in order for this method to be valid.

The purpose of this document is to allow users to evaluate bulk materials with regard to their size-

weighted fine fraction and crystalline silica content.

The calculation method is applicable only after experiments have shown that the results are accurate

and consistently equal or higher than the results from sedimentation, as described in

prEN 17289-3:2018, for that particular bulk material.

For preparation of the sample and determination of crystalline silica by XRD and FT-IR see

prEN 17289-1:2018.

A specific method for the evaluation of the SWFF for diatomaceous earth bulk materials is given in

Annex A. Due to the internal porosity of diatomaceous earth, the general instructions given in this

document are adapted in order to take into account the material’s effective density.

This document is applicable for bulk materials which have been fully investigated and validated. The

criteria for the materials are described in this document and prEN 17289-3:2018. This includes

industrial minerals which can contain crystalline silica such as quartz, clay, kaolin, talc, feldspar, mica,

cristobalite, vermiculite, diatomaceous earth, barite, andalusite, iron ore, chromite etc.

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.

EN 1540:2011, Workplace exposure - Terminology

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

prEN 17289-1:2019, Characterization of bulk materials – Determination of a size-weighted fine fraction

and crystalline silica content — Part 1: General information and choice of test methods

prEN 17289-3:2019, Characterization of bulk materials – Determination of a size-weighted fine fraction

and crystalline silica content — Part 3: Sedimentation method
ISO 1183-1, Plastics — Methods for determining the density of non-cellular plas
...

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