EN ISO 11337:2023

SLOVENSKI STANDARD
01-april-2023
Polimerni materiali - Poliamidi - Določanje ε-kaprolaktama in ω-laurolaktama s
plinsko kromatografijo (ISO 11337:2023)
Plastics - Polyamides - Determination of ε-caprolactam and ω-laurolactam by gas
chromatography (ISO 11337:2023)
Kunststoffe - Polyamide - Gaschromatographische Bestimmung von ε-Caprolactam und
ω-Laurolactam (ISO 11337:2023)
Plastiques - Polyamides - Détermination du ε-caprolactame et du ω-laurolactame par
chromatographie en phase gazeuse (ISO 11337:2023)
Ta slovenski standard je istoveten z: EN ISO 11337:2023
ICS:
83.080.20 Plastomeri Thermoplastic materials
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 11337
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2023
EUROPÄISCHE NORM
ICS 83.080.20 Supersedes EN ISO 11337:2010
English Version
Plastics - Polyamides - Determination of e-caprolactam
and ¿-laurolactam by gas chromatography (ISO
11337:2023)
Plastiques - Polyamides - Détermination du e- Kunststoffe - Polyamide - Gaschromatographische
caprolactame et du ¿-laurolactame par Bestimmung von e-Caprolactam und ¿-Laurolactam
chromatographie en phase gazeuse (ISO 11337:2023) (ISO 11337:2023)
This European Standard was approved by CEN on 6 January 2023.

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, Türkiye 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
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 11337:2023 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 11337:2023) has been prepared by Technical Committee ISO/TC 61 "Plastics"
in collaboration with 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 August 2023, and conflicting national standards shall
be withdrawn at the latest by August 2023.
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 supersedes EN ISO 11337:2010.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
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, 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, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 11337:2023 has been approved by CEN as EN ISO 11337:2023 without any modification.

INTERNATIONAL ISO
STANDARD 11337
Third edition
2023-01
Plastics — Polyamides —
Determination of ε-caprolactam and
ω-laurolactam by gas chromatography
Plastiques — Polyamides — Détermination du ε-caprolactame et du
ω-laurolactame par chromatographie en phase gazeuse
Reference number
ISO 11337:2023(E)
ISO 11337:2023(E)
© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
ISO 11337:2023(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Method A: Extraction method .1
4.1 Principle . 1
4.2 Reagents . 1
4.3 Apparatus and materials . 2
4.4 Preparation of test sample . 3
4.5 Procedure . 4
4.5.1 Test portion . 4
4.5.2 Extraction . 4
4.5.3 Preparation of internal-standard solution . 4
4.5.4 Preparation of sample solution . 4
4.5.5 Preparation of calibration solution . 4
4.5.6 Gas-chromatographic analysis of sample and calibration solutions . 4
4.5.7 Evaluation of gas chromatographic peaks . 5
4.6 Expression of results . . 5
4.7 Precision . . . 5
4.8 Test report . 6
5 Method B: Dissolution method . 6
5.1 Principle . 6
5.2 Reagents . 6
5.3 Apparatus . 7
5.4 Preparation of internal-standard solutions . 8
5.4.1 General . 8
5.4.2 Internal standard for unextracted polyamide 6 . 8
5.4.3 Internal standard for extracted polyamide 6 . 8
5.4.4 Internal standard for polyamide 12 . 8
5.4.5 Preparation of calibration solutions . 9
5.4.6 Calibration . . . 10
5.5 Procedure . 10
5.5.1 Preparation and injection of sample solution . 10
5.5.2 Evaluation of gas-chromatographic peaks. 10
5.5.3 Solvent recovery . 10
5.6 Expression of results . . 11
5.7 Precision . . . 11
5.8 Test report . 11
iii
ISO 11337:2023(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
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/
...