prEN ISO 6427
(Main)Plastics - Determination of matter extractable by organic solvents (conventional methods) (ISO/DIS 6427:2024)
Plastics - Determination of matter extractable by organic solvents (conventional methods) (ISO/DIS 6427:2024)
ISO 6427:2013 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.
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.
Kunststoffe - Bestimmung der extrahierbaren Bestandteile durch organische Lösemittel (Standardverfahren) (ISO/DIS 6427:2024)
Plastiques - Détermination des matières extractibles par des solvants organiques (Méthodes conventionnelles) (ISO/DIS 6427:2024)
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/DIS 6427:2024)
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Standards Content (Sample)
SLOVENSKI STANDARD
01-marec-2024
Polimerni materiali - Določevanje snovi, ki se izločijo z ekstrakcijo z organskimi
topili (klasične metode) (ISO/DIS 6427:2024)
Plastics - Determination of matter extractable by organic solvents (conventional
methods) (ISO/DIS 6427:2024)
Kunststoffe - Bestimmung der extrahierbaren Bestandteile durch organische Lösemittel
(Standardverfahren) (ISO/DIS 6427:2024)
Plastiques - Détermination des matières extractibles par des solvants organiques
(Méthodes conventionnelles) (ISO/DIS 6427:2024)
Ta slovenski standard je istoveten z: prEN ISO 6427
ICS:
83.080.01 Polimerni materiali na Plastics in general
splošno
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
DRAFT INTERNATIONAL STANDARD
ISO/DIS 6427
ISO/TC 61/SC 5 Secretariat: DIN
Voting begins on: Voting terminates on:
2024-01-23 2024-04-16
Plastics — Determination of matter extractable by organic
solvents (conventional methods)
Plastiques — Détermination des matières extractibles par des solvants organiques (Méthodes
conventionnelles)
ICS: 83.080.01
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
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THEREFORE SUBJECT TO CHANGE AND MAY
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NATIONAL REGULATIONS.
ISO/DIS 6427:2024(E)
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. © ISO 2024
ISO/DIS 6427:2024(E)
DRAFT INTERNATIONAL STANDARD
ISO/DIS 6427
ISO/TC 61/SC 5 Secretariat: DIN
Voting begins on: Voting terminates on:
Plastics — Determination of matter extractable by organic
solvents (conventional methods)
Plastiques — Détermination des matières extractibles par des solvants organiques (Méthodes
conventionnelles)
ICS: 83.080.01
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
© ISO 2024
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
NOT BE REFERRED TO AS AN INTERNATIONAL
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on STANDARD UNTIL PUBLISHED AS SUCH.
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NATIONAL REGULATIONS.
Website: www.iso.org ISO/DIS 6427:2023(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
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ii
PROVIDE SUPPORTING DOCUMENTATION. © ISO 2023
ISO/DIS 6427:2023(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Reagents and materials . 2
5 Apparatus . 2
6 Preparation of test sample . 4
7 Number of tests . 4
8 Procedure .5
9 Expression of results . 5
10 Precision . 6
11 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
iii
ISO/DIS 6427:2023(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
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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.
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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).
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www.iso.org/iso/foreword.html.
ISO 6427 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 5, Physical-
chemical properties.
This fourth edition cancels and replaces the third edition (ISO 6427:2013), which has been technically
revised. The main changes compared to the previous edition are as follows:
— update of normative references;
— addition of tolerances of all relevant test parameters;
— completion of test report.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
ISO/DIS 6427:2023(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 document.
v
DRAFT INTERNATIONAL STANDARD ISO/DIS 6427:2023(E)
Plastics — Determination of matter extractable by organic
solvents (conventional methods)
1 Scope
This document 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 document 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 document are used in most cases. The
methods of this document are not intended to be used for migration tests.
If this document is used to test plastics other than those mentioned in Table 1, the operating conditions
are intended to be agreed upon by the interested parties.
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.
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 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
ISO/DIS 6427:2023(E)
4 Reagents and materials
4.1 Extraction liquid, of AR grade and higher grade, to be selected according to the requirements of
the plastic material being tested (see Table 1).
4.2 Anti‑bumping granules.
4.3 Glass wool, pre‑extracted.
5 Apparatus
5.1 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.
5.2 Set of sieves, complying with the requirements of ISO 565.
5.3 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.
5.4 Extraction apparatus, of such a design that the crucible or thimble is heated by the rising vapour
of the extraction liquid.
5.4.1 Soxhlet extractor, as shown in Figure 1.
5.4.2 Other extractors, for example that designed by Twisselmann (see Figure 2), may be used, if
they give the same results as the Soxhlet extractor.
5.5 Container, for the test portion to be extracted: chosen from one of the following:
5.5.1 Cellulose paper thimble, of suitable size, for example diameter 33 mm and length 94 mm.
5.5.2 M
...
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