SIST EN ISO 6427:2014
(Main)Plastics - Determination of matter extractable by organic solvents (conventional methods) (ISO 6427:2013)
Plastics - Determination of matter extractable by organic solvents (conventional methods) (ISO 6427:2013)
EN ISO 6427 specifies methods for the determination of components in plastics that can be extracted by hot organic liquids near their boiling points. For one special case, a so-called coldextraction method is given in Annex B. The extractable components can be monomers, oligomers, polymers, plasticizers, stabilizers, etc. The kind and percentage of extractable matter influence the properties of plastics. The recommended extraction liquid depends on the type of plastic and on the purpose of the determination. The extracted amounts of special constituents are often not quantitative in the sense of analytical chemistry. This International Standard does not apply to plastics that come into contact with food or drinking water. Special regulations for those plastics are established in many countries. In order to test plastics for compliance with these regulations, methods other than those given in this International Standard are used in most cases. The methods of this International Standard are not intended to be used for migration tests. If this International Standard is used to test plastics other than those mentioned in Table 1, the operating conditions is intended to be agreed upon by the interested parties.
Kunststoffe - Bestimmung der extrahierbaren Bestandteile durch organische Lösemittel (Standardverfahren) (ISO 6427:2013)
Diese Internationale Norm legt Verfahren zur Bestimmung von Bestandteilen in Kunststoffen, die durch heiße, organische Flüssigkeiten dicht unter ihren Siedetemperaturen extrahiert werden können, fest. Für einen speziellen Fall ist in Anhang B ein sogenanntes Kalt-Extraktions-Verfahren angegeben.
Die extrahierbaren Bestandteile können aus Monomeren, Oligomeren, Polymeren, Weichmachern, Stabilisatoren usw. bestehen. Die Art und die Menge an extrahierbaren Bestandteilen hat Einfluss auf die Eigenschaften der Kunststoffe.
Die anzuwendende Extraktionsflüssigkeit richtet sich nach der Art des Kunststoffes und nach dem Ziel der Bestimmung (siehe Tabelle 1). Die extrahierbaren Mengen bestimmter Bestandteile werden oft nicht quantitativ im Sinne der analytischen Chemie erfasst.
Diese Internationale Norm ist nicht anzuwenden bei Kunststoffen, die mit Lebensmitteln oder Trinkwasser in Berührung kommen. Für diese Kunststoffe bestehen in vielen Ländern spezielle Vorschriften. Um Kunststoffe in Übereinstimmung mit diesen Vorschriften zu prüfen, sind in den meisten Fällen andere Prüfverfahren anzuwenden als diese, die in dieser Internationalen Norm genannt werden. Die Prüfverfahren dieser Internationalen Norm sind nicht dafür vorgesehen, für Migrationstests angewendet zu werden.
Wenn diese Internationale Norm dazu verwendet wird, um andere als die in der Tabelle 1 aufgeführten Kunststoffe zu prüfen, müssen die Prüfbedingungen zwischen den beteiligten Parteien vereinbart werden.
Plastiques - Détermination des matières extractibles par des solvants organiques (Méthodes conventionnelles) (ISO 6427:2013)
L'ISO 6427:2013 spécifie des méthodes pour la détermination des composants dans les plastiques pouvant être extraits au moyen de liquides organiques chauds près de leurs points d'ébullition. Pour une utilisation spéciale, une méthode d'extraction froide est spécifiée.
Les composants extractibles peuvent être des monomères, des oligomères, des polymères, des plastifiants, des stabilisants, etc. La nature et le pourcentage de la matière extractible ont une influence sur les propriétés des plastiques.
Le liquide d'extraction recommandé dépend du type de plastique mis en présence ainsi que du but de la détermination. Les quantités de composants spéciaux extraites sont souvent non quantitatives dans le sens de la chimie analytique.
Polimerni materiali - Določevanje snovi, ki se izločijo z ekstrakcijo z organskimi topili (klasične metode) (ISO 6427:2013)
EN ISO 6427 navaja metode za določevanje komponent v polimernih materialih, ki se izločijo z ekstrakcijo z vročimi organskimi tekočinami blizu svojih vrelišč. Za en posebni primer je v Dodatku B podana tako imenovana metoda hladne ekstrakcije. Komponente, ki se izločijo, so lahko monomeri, oligomeri, polimeri, mehčalci, stabilizatorji itd. Vrsta in odstotek snovi, ki se lahko izloči, vpliva na lastnosti polimernih materialov. Priporočena ekstrakcijska tekočina je odvisna od vrste polimernega materiala in namena določevanja. Ekstrahirane količine posebnih sestavih pogosto niso kvantitativne v smislu analitične kemije. Ta mednarodni standard ne velja za polimerne materiale, ki so v stiku s hrano ali pitno vodno. Za te polimerne materiale so v mnogih državah določeni posebni predpisi. V večini primerov se za preskušanje skladnosti polimernih materialov s temi predpisi uporabljajo metode, ki niso podane v tem mednarodnem standardu. Metode v tem mednarodnem standardu niso namenjene za uporabo v preskusih migracije. Če se ta mednarodni standard uporablja za preskušanje polimernih materialov, ki niso navedeni v tabeli 1, se morajo zainteresirane strani dogovoriti o delovnih pogojih.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 6427:2014
01-julij-2014
1DGRPHãþD
SIST EN ISO 6427:2000
3ROLPHUQLPDWHULDOL'RORþHYDQMHVQRYLNLVHL]ORþLMR]HNVWUDNFLMR]RUJDQVNLPL
WRSLOL NODVLþQHPHWRGH ,62
Plastics - Determination of matter extractable by organic solvents (conventional
methods) (ISO 6427:2013)
Kunststoffe - Bestimmung der extrahierbaren Bestandteile durch organische Lösemittel
(Standardverfahren) (ISO 6427:2013)
Plastiques - Détermination des matières extractibles par des solvants organiques
(Méthodes conventionnelles) (ISO 6427:2013)
Ta slovenski standard je istoveten z: EN ISO 6427:2014
ICS:
83.080.01 Polimerni materiali na Plastics in general
splošno
SIST EN ISO 6427:2014 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 6427:2014
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SIST EN ISO 6427:2014
EUROPEAN STANDARD
EN ISO 6427
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2014
ICS 83.080.01
English Version
Plastics - Determination of matter extractable by organic
solvents (conventional methods) (ISO 6427:2013)
Plastiques - Détermination des matières extractibles par Kunststoffe - Bestimmung der extrahierbaren Bestandteile
des solvants organiques (Méthodes conventionnelles) (ISO durch organische Lösemittel (Standardverfahren) (ISO
6427:2013) 6427:2013)
This European Standard was approved by CEN on 29 May 2014.
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, 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
© 2014 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 6427:2014 E
worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN ISO 6427:2014
EN ISO 6427:2014 (E)
Contents Page
Foreword .3
2
---------------------- Page: 4 ----------------------
SIST EN ISO 6427:2014
EN ISO 6427:2014 (E)
Foreword
The text of ISO 6427:2013 has been prepared by Technical Committee ISO/TC 61 “Plastics” of the
International Organization for Standardization (ISO) and has been taken over as EN ISO 6427:2014 by
Technical Committee CEN/TC 249 “Plastics” the secretariat of which is held by NBN.
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 December 2014, and conflicting national standards shall be withdrawn
at the latest by December 2014.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
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, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
Endorsement notice
The text of ISO 6427:2013 has been approved by CEN as EN ISO 6427:2014 without any modification.
3
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SIST EN ISO 6427:2014
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SIST EN ISO 6427:2014
INTERNATIONAL ISO
STANDARD 6427
Third edition
2013-02-01
Plastics — Determination of matter
extractable by organic solvents
(conventional methods)
Plastiques — Détermination des matières extractibles par des
solvants organiques (Méthodes conventionnelles)
Reference number
ISO 6427:2013(E)
©
ISO 2013
---------------------- Page: 7 ----------------------
SIST EN ISO 6427:2014
ISO 6427:2013(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2013
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any
means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the
address below or ISO’s member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2013 – All rights reserved
---------------------- Page: 8 ----------------------
SIST EN ISO 6427:2014
ISO 6427:2013(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Reagents and materials . 1
4 Apparatus . 2
5 Preparation of test sample . 4
6 Number of tests . 4
7 Procedure. 4
8 Expression of results . 5
9 Precision . 6
10 Test report . 6
Annex A (normative) Procedure for casting, drying, and cutting films of cellulose acetate .10
Annex B (normative) Determination of solubility of polypropylene in cold p‑xylene .12
Bibliography .15
© ISO 2013 – All rights reserved iii
---------------------- Page: 9 ----------------------
SIST EN ISO 6427:2014
ISO 6427:2013(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International
Standards adopted by the technical committees are circulated to the member bodies for voting.
Publication as an International Standard requires approval by at least 75 % of the member bodies
casting a vote.
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.
ISO 6427 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 5, Physical-
chemical properties.
This third edition cancels and replaces the second edition (ISO 6427:1992), of which it constitutes a
minor revision, the main purpose of which was to delete the second sentence in (subclause) 5.1. In
addition, the minimum density for which the method is suitable for PE has been indicated directly in
[1]
footnote “e” to Table 1, rather than referring the reader to ISO 1872-1 and what was Table 1 in the 1992
edition has been split into two tables for ease of comprehension.
iv © ISO 2013 – All rights reserved
---------------------- Page: 10 ----------------------
SIST EN ISO 6427:2014
ISO 6427:2013(E)
Introduction
There are several very similar national and international standards for determination of the percentage
of extractable matter, with only slight differences in the procedures. To facilitate the work of the
laboratory staff which has to carry out these determinations on various plastics products, the generally
applicable methods are described in this International Standard.
© ISO 2013 – All rights reserved v
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SIST EN ISO 6427:2014
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SIST EN ISO 6427:2014
INTERNATIONAL STANDARD ISO 6427:2013(E)
Plastics — Determination of matter extractable by organic
solvents (conventional methods)
1 Scope
This International Standard specifies methods for the determination of components in plastics that
can be extracted by hot organic liquids near their boiling points. For one special case, a so-called cold-
extraction method is given in Annex B.
The extractable components can be monomers, oligomers, polymers, plasticizers, stabilizers, etc. The
kind and percentage of extractable matter influence the properties of plastics.
The recommended extraction liquid depends on the type of plastic and on the purpose of the
determination (see Table 1). The extracted amounts of special constituents are often not quantitative in
the sense of analytical chemistry.
This International Standard does not apply to plastics that come into contact with food or drinking
water. Special regulations for those plastics are established in many countries. In order to test plastics
for compliance with these regulations, methods other than those given in this International Standard
are used in most cases. The methods of this International Standard are not intended to be used for
migration tests.
If this International Standard is used to test plastics other than those mentioned in Table 1, the operating
conditions is intended to be agreed upon by the interested parties.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 308, Plastics — Phenolic moulding materials — Determination of acetone-soluble matter (apparent
resin content of material in the unmoulded state)
ISO 383, Laboratory glassware — Interchangeable conical ground joints
ISO 565, Test sieves — Metal wire cloth, perforated metal plate and electroformed sheet — Nominal
sizes of openings
ISO 1773, Laboratory glassware — Narrow-necked boiling flasks
ISO 1875, Plastics — Plasticized cellulose acetate — Determination of matter extractable by diethyl ether
3 Reagents and materials
3.1 Extraction liquid, of recognized analytical grade, to be selected according to the requirements of
the plastic material being tested (see Table 1).
3.2 Anti‑bumping granules.
3.3 Glass wool, pre-extracted.
© ISO 2013 – All rights reserved 1
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SIST EN ISO 6427:2014
ISO 6427:2013(E)
4 Apparatus
4.1 Mill, for reducing the sample to the required grain size.
A mill in which the sample is cut between rotating and stationary blades is preferred. Large pieces can
be reduced in size with a pair of shears before they are fed into the mill.
4.2 Set of sieves, complying with the requirements of ISO 565.
4.3 Flat-bottomed flask, of suitable capacity, for example 250 ml, complying with the requirements of
ISO 1773, with ground-glass neck complying with the requirements of ISO 383.
4.4 Extraction apparatus, of such a design that the crucible or thimble is heated by the rising vapour
of the extraction liquid.
4.4.1 Soxhlet extractor, as shown in Figure 1.
4.4.2 Other extractors, for example that designed by Twisselmann (see Figure 2), may be used, if they
give the same results as the Soxhlet extractor.
4.5 Container, for the test portion to be extracted: chosen from one of the following:
4.5.1 Cellulose paper thimble, of suitable size, for example diameter 33 mm and length 94 mm.
4.5.2 Metal wire basket, of the same dimensions as the thimble (4.5.1).
4.5.3 Glass-filter crucible, pore size 40 μm to 100 μm.
NOTE The choice of a suitable container for the extraction is very important. The mass of the cellulose
thimble (4.5.1) depends on its moisture content, and this can lead to variable results when weighing. The metal
wire basket (4.5.2) cannot be used with a powder sample or if a chemical reaction is possible between the metal
and any of the components of the plastic. Difficulties can be caused by penetration of components of the plastic
into the pores of the glass-filter crucible (4.5.3) and subsequent swelling.
4.6 Reflux condenser, fitted with a ground-glass cone to fit the extraction apparatus (4.4), for example
a Dimroth condenser.
4.7 Heating device, which does not use a naked flame and is explosion-proof, suitable for use with the
flask (4.3).
4.8 Balance, accurate to 0,1 mg.
4.9 Desiccator, containing calcium chloride or silica gel.
2 © ISO 2013 – All rights reserved
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SIST EN ISO 6427:2014
ISO 6427:2013(E)
Dimensions in millimetres
Key
1 extractor trap
2 thimble
3 solvent
4 heater
Figure 1 — Extraction apparatus capable of receiving the thimble (4.5.1) or other sample containers
4.10 Distillation equipment.
One of the following devices shall be used:
4.10.1 Rotary evaporator.
4.10.2 Distillation apparatus, fitted with a Vigreux or equivalent distillation column of length at
least 400 mm.
4.11 Vacuum oven or oven with fresh air circulation, explosion-proof, capable of maintaining a
temperature of 105 °C.
© ISO 2013 – All rights reserved 3
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SIST EN ISO 6427:2014
ISO 6427:2013(E)
4.12 Evaporating dish, of suitable capacity, for example 200 ml.
Dimensions in millimetres
Key
1 45/40 ground-glass socket
2 vacuum jacket
3 29/32 ground-glass cone
Figure 2 — Extractor of Twisselmann type with vacuum jacket
5 Preparation of test sample
5.1 The plastics material or plastics product shall be free of dust and foreign matter.
5.2 The sample of plastic shall be reduced to small pieces, for example by grinding in a suitable mill
(4.1), but shall not be heated more than necessary. In some cases, it may be necessary to add solid carbon
dioxide to prevent heat build-up during grinding. The reduction in size may also be done by the use of
a razor blade or a pair of scissors, or a file for hard materials. The portion of the sample of specified
granular size (see Table 1) shall be kept in a closed bottle until tested. Films with a thickness of less than
0,5 mm may be cut into small fragments for insertion into the thimble.
6 Number of tests
At least two determinations shall be made.
7 Procedure
7.1 The specific details of the procedure to be used depend on the material to be tested and are given
in Tables 1 and 2. The general procedure is as described hereafter.
4 © ISO 2013 – All rights reserved
---------------------- Page: 16 ----------------------
SIST EN ISO 6427:2014
ISO 6427:2013(
...
SLOVENSKI STANDARD
kSIST FprEN ISO 6427:2014
01-februar-2014
3ROLPHUQLPDWHULDOL'RORþHYDQMHVQRYLNLVHL]ORþLMR]HNVWUDNFLMR]RUJDQVNLPL
WRSLOL NODVLþQHPHWRGH ,62
Plastics - Determination of matter extractable by organic solvents (conventional
methods) (ISO 6427:2013)
Kunststoffe - Bestimmung der extrahierbaren Bestandteile durch organische Lösemittel
(Standardverfahren) (ISO 6427:2013)
Plastiques - Détermination des matières extractibles par des solvants organiques
(Méthodes conventionnelles) (ISO 6427:2013)
Ta slovenski standard je istoveten z: FprEN ISO 6427
ICS:
83.080.01 Polimerni materiali na Plastics in general
splošno
kSIST FprEN ISO 6427:2014 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
kSIST FprEN ISO 6427:2014
---------------------- Page: 2 ----------------------
kSIST FprEN ISO 6427:2014
EUROPEAN STANDARD
FINAL DRAFT
FprEN ISO 6427
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2013
ICS 83.080.01 Will supersede EN ISO 6427:1998
English Version
Plastics - Determination of matter extractable by organic
solvents (conventional methods) (ISO 6427:2013)
Plastiques - Détermination des matières extractibles par Kunststoffe - Bestimmung der extrahierbaren Bestandteile
des solvants organiques (Méthodes conventionnelles) (ISO durch organische Lösemittel (Standardverfahren) (ISO
6427:2013) 6427:2013)
This draft European Standard is submitted to CEN members for unique acceptance procedure. It has been drawn up by the Technical
Committee CEN/TC 249.
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, 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: Avenue Marnix 17, B-1000 Brussels
© 2013 CEN All rights of exploitation in any form and by any means reserved Ref. No. FprEN ISO 6427:2013 E
worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
kSIST FprEN ISO 6427:2014
FprEN ISO 6427:2013 (E)
Contents Page
Foreword .3
2
---------------------- Page: 4 ----------------------
kSIST FprEN ISO 6427:2014
FprEN ISO 6427:2013 (E)
Foreword
The text of ISO 6427:2013 has been prepared by Technical Committee ISO/TC 61 “Plastics” of the
International Organization for Standardization (ISO) and has been taken over as FprEN ISO 6427:2013 by
Technical Committee CEN/TC 249 “Plastics” the secretariat of which is held by NBN.
This document is currently submitted to the Unique Acceptance Procedure.
This document will supersede EN ISO 6427:1998.
Endorsement notice
The text of ISO 6427:2013 has been approved by CEN as FprEN ISO 6427:2013 without any modification.
3
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kSIST FprEN ISO 6427:2014
---------------------- Page: 6 ----------------------
kSIST FprEN ISO 6427:2014
INTERNATIONAL ISO
STANDARD 6427
Third edition
2013-02-01
Plastics — Determination of matter
extractable by organic solvents
(conventional methods)
Plastiques — Détermination des matières extractibles par des
solvants organiques (Méthodes conventionnelles)
Reference number
ISO 6427:2013(E)
©
ISO 2013
---------------------- Page: 7 ----------------------
kSIST FprEN ISO 6427:2014
ISO 6427:2013(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2013
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any
means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the
address below or ISO’s member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2013 – All rights reserved
---------------------- Page: 8 ----------------------
kSIST FprEN ISO 6427:2014
ISO 6427:2013(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Reagents and materials . 1
4 Apparatus . 2
5 Preparation of test sample . 4
6 Number of tests . 4
7 Procedure. 4
8 Expression of results . 5
9 Precision . 6
10 Test report . 6
Annex A (normative) Procedure for casting, drying, and cutting films of cellulose acetate .10
Annex B (normative) Determination of solubility of polypropylene in cold pxy‑ lene .12
Bibliography .15
© ISO 2013 – All rights reserved iii
---------------------- Page: 9 ----------------------
kSIST FprEN ISO 6427:2014
ISO 6427:2013(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International
Standards adopted by the technical committees are circulated to the member bodies for voting.
Publication as an International Standard requires approval by at least 75 % of the member bodies
casting a vote.
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.
ISO 6427 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 5, Physical-
chemical properties.
This third edition cancels and replaces the second edition (ISO 6427:1992), of which it constitutes a
minor revision, the main purpose of which was to delete the second sentence in (subclause) 5.1. In
addition, the minimum density for which the method is suitable for PE has been indicated directly in
[1]
footnote “e” to Table 1, rather than referring the reader to ISO 1872-1 and what was Table 1 in the 1992
edition has been split into two tables for ease of comprehension.
iv © ISO 2013 – All rights reserved
---------------------- Page: 10 ----------------------
kSIST FprEN ISO 6427:2014
ISO 6427:2013(E)
Introduction
There are several very similar national and international standards for determination of the percentage
of extractable matter, with only slight differences in the procedures. To facilitate the work of the
laboratory staff which has to carry out these determinations on various plastics products, the generally
applicable methods are described in this International Standard.
© ISO 2013 – All rights reserved v
---------------------- Page: 11 ----------------------
kSIST FprEN ISO 6427:2014
---------------------- Page: 12 ----------------------
kSIST FprEN ISO 6427:2014
INTERNATIONAL STANDARD ISO 6427:2013(E)
Plastics — Determination of matter extractable by organic
solvents (conventional methods)
1 Scope
This International Standard specifies methods for the determination of components in plastics that
can be extracted by hot organic liquids near their boiling points. For one special case, a so-called cold-
extraction method is given in Annex B.
The extractable components can be monomers, oligomers, polymers, plasticizers, stabilizers, etc. The
kind and percentage of extractable matter influence the properties of plastics.
The recommended extraction liquid depends on the type of plastic and on the purpose of the
determination (see Table 1). The extracted amounts of special constituents are often not quantitative in
the sense of analytical chemistry.
This International Standard does not apply to plastics that come into contact with food or drinking
water. Special regulations for those plastics are established in many countries. In order to test plastics
for compliance with these regulations, methods other than those given in this International Standard
are used in most cases. The methods of this International Standard are not intended to be used for
migration tests.
If this International Standard is used to test plastics other than those mentioned in Table 1, the operating
conditions is intended to be agreed upon by the interested parties.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 308, Plastics — Phenolic moulding materials — Determination of acetone-soluble matter (apparent
resin content of material in the unmoulded state)
ISO 383, Laboratory glassware — Interchangeable conical ground joints
ISO 565, Test sieves — Metal wire cloth, perforated metal plate and electroformed sheet — Nominal
sizes of openings
ISO 1773, Laboratory glassware — Narrow-necked boiling flasks
ISO 1875, Plastics — Plasticized cellulose acetate — Determination of matter extractable by diethyl ether
3 Reagents and materials
3.1 Extraction liquid, of recognized analytical grade, to be selected according to the requirements of
the plastic material being tested (see Table 1).
3.2 Anti‑bumping granules.
3.3 Glass wool, pre-extracted.
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4 Apparatus
4.1 Mill, for reducing the sample to the required grain size.
A mill in which the sample is cut between rotating and stationary blades is preferred. Large pieces can
be reduced in size with a pair of shears before they are fed into the mill.
4.2 Set of sieves, complying with the requirements of ISO 565.
4.3 Flat-bottomed flask, of suitable capacity, for example 250 ml, complying with the requirements of
ISO 1773, with ground-glass neck complying with the requirements of ISO 383.
4.4 Extraction apparatus, of such a design that the crucible or thimble is heated by the rising vapour
of the extraction liquid.
4.4.1 Soxhlet extractor, as shown in Figure 1.
4.4.2 Other extractors, for example that designed by Twisselmann (see Figure 2), may be used, if they
give the same results as the Soxhlet extractor.
4.5 Container, for the test portion to be extracted: chosen from one of the following:
4.5.1 Cellulose paper thimble, of suitable size, for example diameter 33 mm and length 94 mm.
4.5.2 Metal wire basket, of the same dimensions as the thimble (4.5.1).
4.5.3 Glass-filter crucible, pore size 40 μm to 100 μm.
NOTE The choice of a suitable container for the extraction is very important. The mass of the cellulose
thimble (4.5.1) depends on its moisture content, and this can lead to variable results when weighing. The metal
wire basket (4.5.2) cannot be used with a powder sample or if a chemical reaction is possible between the metal
and any of the components of the plastic. Difficulties can be caused by penetration of components of the plastic
into the pores of the glass-filter crucible (4.5.3) and subsequent swelling.
4.6 Reflux condenser, fitted with a ground-glass cone to fit the extraction apparatus (4.4), for example
a Dimroth condenser.
4.7 Heating device, which does not use a naked flame and is explosion-proof, suitable for use with the
flask (4.3).
4.8 Balance, accurate to 0,1 mg.
4.9 Desiccator, containing calcium chloride or silica gel.
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Dimensions in millimetres
Key
1 extractor trap
2 thimble
3 solvent
4 heater
Figure 1 — Extraction apparatus capable of receiving the thimble (4.5.1) or other sample containers
4.10 Distillation equipment.
One of the following devices shall be used:
4.10.1 Rotary evaporator.
4.10.2 Distillation apparatus, fitted with a Vigreux or equivalent distillation column of length at
least 400 mm.
4.11 Vacuum oven or oven with fresh air circulation, explosion-proof, capable of maintaining a
temperature of 105 °C.
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4.12 Evaporating dish, of suitable capacity, for example 200 ml.
Dimensions in millimetres
Key
1 45/40 ground-glass socket
2 vacuum jacket
3 29/32 ground-glass cone
Figure 2 — Extractor of Twisselmann type with vacuum jacket
5 Preparation of test sample
5.1 The plastics material or plastics product shall be free of dust and foreign matter.
5.2 The sample of plastic shall be reduced to small pieces, for example by grinding in a suitable mill
(4.1), but shall not be heated more than necessary. In some cases, it may be necessary to add solid carbon
dioxide to prevent heat build-up during grinding. The reduction in size may also be done by the use of
a razor blade or a pair of scissors, or a file for hard materials. The portion of the sample of specified
granular size (see Table 1) shall be kept in a closed bottle until tested. Films with a thickness of less than
0,5 mm may be cut into small fragments for insertion into the thimble.
6 Number of tests
At least two determinations shall be made.
7 Procedure
7.1 The specific details of the procedure to be used depend on the material to be tested and are given
in Tables 1 and 2. The general procedure is as described hereafter.
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7.2 Dry the paper thimble (4.5.1), wire basket (4.5.2) or filter crucible (4.5.3) for 1 h in the oven (4.11) at
the same temperature as used later for the drying of the plastic tested; allow to cool to room temperature
...
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