EN ISO 19918:2017

SLOVENSKI STANDARD
01-februar-2018
Varovalna obleka - Varovanje pred kemikalijami - Merjenje kumulativnega
pronicanja kemikalij z nizkim parnim tlakom skozi materiale (ISO 19918:2017)
Protective clothing - Protection against chemicals - Measurement of cumulative
permeation of chemicals with low vapour pressure through materials (ISO 19918:2017)
Schutzkleidung - Schutz gegen Chemikalien - Messung der kumulativen Permeation von
Chemikalien mit niedrigem Dampfdruck durch Schutzkleidungs- und
Handschuhmaterialien (ISO 19918:2017)
Vêtements de protection - Protection contre les produits chimiques - Mesure de la
perméation cumulée à travers des matériaux des produits chimiques ayant une faible
pression de vapeur (ISO 19918:2017)
Ta slovenski standard je istoveten z: EN ISO 19918:2017
ICS:
13.340.10 Varovalna obleka Protective clothing
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 19918
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2017
EUROPÄISCHE NORM
ICS 13.340.10
English Version
Protective clothing - Protection against chemicals -
Measurement of cumulative permeation of chemicals with
low vapour pressure through materials (ISO 19918:2017)
Habillement de protection - Protection contre les Schutzkleidung - Schutz gegen Chemikalien - Messung
produits chimiques - Mesure de la perméation cumulée der kumulativen Permeation von Chemikalien mit
à travers des matériaux des produits chimiques ayant niedrigem Dampfdruck durch Materialien (ISO
une faible pression de vapeur (ISO 19918:2017) 19918:2017)
This European Standard was approved by CEN on 15 September 2017.

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: Avenue Marnix 17, B-1000 Brussels
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 19918:2017 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of EU Directive 89/686/EEC aimed to be covered . 4

European foreword
This document (EN ISO 19918:2017) has been prepared by Technical Committee ISO/TC 94 “Personal
safety - Protective clothing and equipment” in collaboration with Technical Committee CEN/TC 162
“Protective clothing including hand and arm protection and lifejackets” 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 May 2018, and conflicting national standards shall be
withdrawn at the latest by May 2018.
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, and supports essential requirements of EU Directive(s).
For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this
document.
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.
Endorsement notice
The text of ISO 19918:2017 has been approved by CEN as EN ISO 19918:2017 without any modification.
Annex ZA
(informative)
Relationship between this European Standard and the essential
requirements of EU Directive 89/686/EEC aimed to be covered
This European Standard has been prepared under a Commission’s standardization request M/031 to
provide one voluntary means of conforming to essential requirements of Directive 89/686/EEC on the
approximation of the laws of the Member States relating to personal protective equipment [1989 L399].
Once this document is cited in the Official Journal of the European Union under that Directive,
compliance with the normative clauses of this standard given in Table ZA.1 confers, within the limits of
the scope of this standard, a presumption of conformity with the corresponding essential requirements
of that Directive and associated EFTA regulations.
Table ZA.1 — Correspondence between this International Standard and Annex II of the Directive
89/686/EEC Personal Protective Equipment
Essential Requirements of Clause(s)/subclause(s) of Remarks/Notes
Directive 89/686/EEC this International
Standard
3.10.2, Protection against cutaneous Complete Standard Together with the
and ocular contact requirements in the
product standard
WARNING 1 Presumption of conformity stays valid only as long as a reference to this European
Standard is maintained in the list published in the Official Journal of the European Union. Users of this
standard should consult frequently the latest list published in the Official Journal of the European
Union.
WARNING 2 Other Union legislation may be applicable to the product(s) falling within the scope of this
standard.
INTERNATIONAL ISO
STANDARD 19918
First edition
2017-09
Protective clothing — Protection
against chemicals — Measurement of
cumulative permeation of chemicals
with low vapour pressure through
materials
Habillement de protection — Protection contre les produits chimiques
— Mesure de la perméation cumulée à travers des matériaux des
produits chimiques ayant une faible pression de vapeur
Reference number
ISO 19918:2017(E)
©
ISO 2017
ISO 19918:2017(E)
© ISO 2017, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
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ii © ISO 2017 – All rights reserved

ISO 19918:2017(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 3
5 Apparatus and supplies . 3
6 Test parameters . 4
6.1 Analytical method . 4
6.2 Determination of extraction efficiency . 5
6.3 Test specimens . 5
7 Preparation of test chemical and test specimens . 6
8 Procedure. 6
8.1 Contamination . 6
8.2 Extraction and analysis . 7
9 Expression of results . 7
10 Report . 8
11 Precision and bias . 9
Annex A (informative) Schematic diagram of the permeation cell .10
Annex B (normative) Drawing and measurements of the permeation cell, washer, and bolts .11
Annex C (informative) Sources of permeation test cells, and permeation cell parts .13
Annex D (informative) Selection of gasket and pressure .14
Annex E (informative) Interlaboratory test data .15
Bibliography .16
ISO 19918:2017(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
URL: www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 94, Personal safety — Protective clothing
and equipment, Subcommittee SC 13, Protective clothing.
iv © ISO 2017 – All rights reserved

ISO 19918:2017(E)
Introduction
When assessing the performance of personal protective equipment (PPE) against chemical risks, it is
clearly important to determine the ability of PPE materials to resist chemical ingress. The term "ingress"
is used here specifically so as not to distinguish between penetration and permeation. Penetration is
ingress through physical holes in the fabric such as pores, stitch-holes, and gaps in a protective coating.
Penetration is usually quite a rapid process, leading to the ingress of chemical within a matter of
minutes, whereas permeation is usually a slower process with molecular diffusion through a polymer
or elastomer. However, from the perspective of the wearer of PPE (gloves, footwear, protective clothing)
the mechanism of ingress is far less relevant than the fact that a quantity of chemical may at some point
migrate through the fabric of the personal protective equipment.
Standards to measure permeation are designed to measure the performance of materials that include
a polymer or elastomer as the movement in these materials is at the molecular level. However, although
they are intended to measure movement of chemicals at a molecular level, it may be difficult to
differentiate between penetration and permeation in materials with small pores, pinholes, and gaps in
coating.
A number of standards, including ISO 6529, EN 16523-1 and ASTM F739, measure permeation of
chemicals that are volatile and/or soluble in water or other liquid or gaseous collection media. In the
above-mentioned standards, volatility or solubility in water or other liquid that does not interact
with the material allows use of gaseous or liquid collection medium. However, based on the scopes of
ISO 6529, EN 16523-1 and ASTM F739, these standards are not well-suited for quantifying the ingress
of chemicals and mixtures that are involatile and/or insoluble in water and other liquids that do not
interact with the material being tested. This document complements the above-mentioned standards
as it is suitable for measuring chemicals that cannot be measured by other standards and vice versa.
This document is intended to be used to evaluate the barrier effectiveness materials used in personal
protective equipment against permeation by solid and liquid chemicals with low vapour pressure
and/or low solubility in commonly used liquid and gaseous collection media. This test method is not
suitable for measurement of volatile chemicals that may evaporate before the chemical analysis is
complete.
INTERNATIONAL STANDARD ISO 19918:2017(E)
Protective clothing — Protection against chemicals —
Measurement of cumulative permeation of chemicals with
low vapour pressure through materials
1 Scope
This document describes laboratory test methods to determine the resistance of materials, closures,
and seams used in personal protective equipment (PPE) to permeation by solid or liquid chemicals
with low vapour pressure (less than 133,322 Pa at 25 °C) and/or insolubility in water or other liquids
commonly used as collection media. These chemicals that are often part of pesticide formulations and
other mixtures cannot be measured using other standards for measuring permeation. This test method
is suitable for field strength and concentrated pesticide formulations as well as other mixtures in which
the active ingredient is a chemical with low vapour pressure and/or low solubility in commonly used
liquid and gaseous collection media.
This test method is not intended to be used in place of standards such as ISO 6529, EN 16523-1 and
ASTM F739, which measure permeation of chemicals that are either volatile or soluble in water or
other liquids that do not interact with the material being tested. This document is not suitable for
measurement of volatile chemicals that may evaporate before the chemical analysis is complete.
The degree of contamination depends on numerous factors, such as type of exposure, application
technique, and chemical formulation. As the level of exposure can vary considerably, this method is
designed to rate relative performance of PPE materials for different durations.
This method is designed to measure cumulative permeation. Breakthrough time cannot be measured
by this method. This test method does not measure resistance to penetration or degradation.
The test method standard may be used for the evaluation of PPE materials that are new or those for
which the product standard requires treatment, such as laundering or simulated abrasion. Details of
the treatment shall be reported.
2 Normative references
No normative references are required for this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at http://www.iso.org/obp
— IEC Electropedia: available at http://www.electropedia.org/
3.1
analytical technique
method of quantifying the amount of permeated chemical in the collection medium
Note 1 to entry: Such methods are often specific to individual chemical and collection-medium combinations.
ISO 19918:2017(E)
3.2
breakthrough detection time
elapsed time measured from the start of the test to the sampling time that immediately precedes the
sampling time at which the test chemical is first detected
3.3
cumulative permeation mass
total amount of chemical that permeates during a specified time from the time the material specimen is
first contacted with the test chemical
3.4
degradation
deleterious change in one or more properties due to contact with a chemical or heat
3.5
limit of quantification
minimum quantity of a substance which can be measured
Note 1 to entry: It is the value where the uncertainty of measurement is equal to 50% of the determined value.
3.6
penetration
process by which a chemical and/or microorganism moves through porous materials, seams, pinholes,
or other imperfections in a material on a non-molecular level
Note 1 to entry: For the purpose of this document, penetration refers to only chemicals, not micro-organisms.
Note 2 to entry: For the purpose of this document, materials include protective clothing, footwear, and glove
materials.
3.7
permeation
process by which a chemical moves through a material on a molecular level
Note 1 to entry: Permeation involves (1) adsorption of molecules of the chemical onto the contacted (outside)
surface of a material, (2) diffusion of the adsorbed molecules into and through the material, and (3) desorption of
the molecules from the opposite (inside) surface of the material.
Note 2 to
...