EN ISO 4531:2018

Vitreous and porcelain enamels - Release from enamelled articles in contact with food - Methods of test and limits (ISO 4531:2018)

This document specifies a simulating method of test for determination of the release of metal-ions from enamelled articles, which are intended to come into contact with food.
It also specifies limits for the release of metal-ions from enamelled articles, which are intended to come into contact with food.
It is applicable to enamelled articles, including tanks and vessels, which are intended to be used for the preparation, cooking, serving and storage of food.

Emails - Freisetzung aus emaillierten Gegenständen für den Kontakt mit Lebensmitteln - Prüfverfahren und zulässige Grenzwerte (ISO 4531:2018)

Diese Norm legt ein Simulationsprüfverfahren zur Bestimmung der Freisetzung von Metallionen aus emaillierten Gegenständen fest, die für den Kontakt mit Lebensmitteln (einschließlich Getränken) bestimmt sind.
Darüber hinaus legt diese Norm auch die Grenzwerte für die Freisetzung von Metallionen aus emaillierten Gegenständen fest, die für den Kontakt mit Lebensmitteln (einschließlich Getränken) bestimmt sind.
Diese Norm ist für emaillierte Gegenstände anwendbar, einschließlich für Behältnisse und Gefäße, die zum Zubereiten, Kochen, Servieren und Aufbewahren von Lebensmitteln bestimmt sind.

Émaux vitrifiés - Libération depuis les articles émaillés en contact avec les aliments - Méthode d'essai et limites (ISO 4531:2018)

Le présent document spécifie une méthode d'essai de simulation pour la détermination de la libération d'ions métalliques par les articles émaillés destinés à entrer en contact avec les denrées alimentaires.
Il spécifie également les limites relatives à la libération d'ions métalliques par les articles émaillés destinés à entrer en contact avec les denrées alimentaires.
Il s'applique aux articles émaillés, y compris aux réservoirs et récipients destinés à la préparation, à la cuisson, au service et à la conservation des denrées alimentaires.

Steklasti in porcelanski emajli - Sproščanje iz emajliranih delcev v stiku z živili - Metode preskušanja in mejne vrednosti (ISO 4531:2018)

Standard ISO 4531 določa simulacijsko metodo preskusa za ugotavljanje sproščanja kovinskih ionov iz emajliranih izdelkov, ki prihajajo v stik z živili (vključno s pijačo). Standard ISO 4531 prav tako določa dopustne mejne vrednosti za sproščanje kovinskih ionov iz emajliranih izdelkov, ki prihajajo v stik z živili (vključno s pijačo). Standard ISO 4531 se uporablja za emajlirane izdelke, vključno s cisternami in posodami, ki se uporabljajo za pripravo, kuhanje, serviranje in shranjevanje živil. Standard ISO 4531 se uporablja za emajlirane izdelke, vključno s cisternami in posodami, ki se lahko uporabljajo za pripravo, kuhanje, serviranje in shranjevanje živil.

General Information

• Status: Withdrawn
• Publication Date: 09-Oct-2018
• Withdrawal Date: 13-Apr-2025
• ICS: 25.220.50 - Enamels
• ICS: 67.250 - Materials and articles in contact with foodstuffs
• ICS: 97.040.60 - Cookware, cutlery and flatware
• Technical Committee: CEN/TC 262 - Metallic and other inorganic coatings
• Drafting Committee: CEN/TC 262/WG 5 - Vitreous enamel coatings
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Start Date: 04-May-2022
• Completion Date: 14-Apr-2025
• Ref Project: SIST EN ISO 4531:2018 - Vitreous and porcelain enamels - Release from enamelled articles in contact with food - Methods of test and limits (ISO 4531:2018)

Relations

• Replaced By: EN ISO 4531:2022 - Vitreous and porcelain enamels - Release from enamelled articles in contact with food - Methods of test and limits (ISO 4531:2022)
• Effective Date: 11-May-2022

Standards Content (Sample)

SLOVENSKI STANDARD
01-december-2018
6WHNODVWLLQSRUFHODQVNLHPDMOL6SURãþDQMHL]HPDMOLUDQLKGHOFHYYVWLNX]åLYLOL
0HWRGHSUHVNXãDQMDLQPHMQHYUHGQRVWL,62
Vitreous and porcelain enamels - Release from enamelled articles in contact with food -
Methods of test and limits (ISO 4531:2018)
Emails - Freisetzung aus emaillierten Gegenständen für den Kontakt mit Lebensmitteln -
Prüfverfahren und zulässige Grenzwerte (ISO 4531:2018)
Émaux vitrifiés - Libération depuis les articles émaillés en contact avec les aliments -
Méthode d'essai et limites (ISO 4531:2018)
Ta slovenski standard je istoveten z: EN ISO 4531:2018
ICS:
25.220.50 Emajlne prevleke Enamels
67.250 Materiali in predmeti v stiku z Materials and articles in
živili contact with foodstuffs
97.040.60 Kuhinjska posoda, jedilni Cookware, cutlery and
servisi in jedilni pribor flatware
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 4531
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2018
EUROPÄISCHE NORM
ICS 25.220.50; 67.250; 97.040.60
English Version
Vitreous and porcelain enamels - Release from enamelled
articles in contact with food - Methods of test and limits
(ISO 4531:2018)
Émaux vitrifiés - Libération depuis les articles émaillés Emails - Freisetzung aus emaillierten Gegenständen für
en contact avec les aliments - Méthode d'essai et den Kontakt mit Lebensmitteln - Prüfverfahren und
limites (ISO 4531:2018) zulässige Grenzwerte (ISO 4531:2018)
This European Standard was approved by CEN on 31 August 2018.

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: Rue de la Science 23, B-1040 Brussels
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 4531:2018 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 4531:2018) has been prepared by Technical Committee ISO/TC 107 "Metallic
and other inorganic coatings" in collaboration with Technical Committee CEN/TC 262 “Metallic and
other inorganic coatings, including for corrosion protection and corrosion testing of metals and alloys”
the secretariat of which is held by BSI.
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 April 2019, and conflicting national standards shall be
withdrawn at the latest by April 2019.
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 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 4531:2018 has been approved by CEN as EN ISO 4531:2018 without any modification.

INTERNATIONAL ISO
STANDARD 4531
First edition
2018-09
Vitreous and porcelain enamels —
Release from enamelled articles in
contact with food — Methods of test
and limits
Émaux vitrifiés — Libération depuis les articles émaillés en contact
avec les aliments — Méthode d'essai et limites
Reference number
ISO 4531:2018(E)
©
ISO 2018
ISO 4531:2018(E)
© ISO 2018
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: [phone]
Fax: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2018 – All rights reserved

ISO 4531:2018(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Reagents . 2
6 Apparatus . 2
7 Samples . 3
8 Preparation of samples. 3
9 Test conditions . 3
10 Procedure. 4
10.1 Release test. 4
10.1.1 Release test lab apparatus . 4
10.1.2 Release from enamelled articles . 5
10.2 Sampling the release test solution for analysis (sample measuring solution) . 5
11 Expression of results . 5
11.1 Reporting . 5
11.2 Test report . 6
Annex A (informative) Explanatory information on release limits . 7
Bibliography . 9
ISO 4531:2018(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 of 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 www .iso
.org/iso/foreword .html.
This document was prepared by the European Committee for Standardization (CEN) Technical
Committee CEN/TC 262, Metallic and other inorganic coatings, including for corrosion protection and
corrosion testing of metals and alloys, in collaboration with ISO Technical Committee ISO/TC 107, Metallic
and other inorganic coatings, in accordance with the agreement on technical cooperation between ISO
and CEN (Vienna Agreement).
This first edition cancels and replaces ISO 4531-1:1998 and ISO 4531-2:1998, which have been combined
and technically revised.
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 2018 – All rights reserved

ISO 4531:2018(E)
Introduction
The release of metal-ions from enamelled articles requires effective means of control to ensure
protection against possible hazards arising from the use of improperly formulated, applied and fired
enamels and/or inorganic decorations on the food contact surfaces of enamelled articles used for the
preparation, cooking, serving and storage of foodstuffs.
As a secondary consideration, different requirements from country to country for the control of the
release of ions from the surfaces of enamelled articles present non-tariff barriers to international trade
in these commodities. Accordingly, there is a need to establish internationally accepted methods of
testing enamelled articles for the release of metal-ions.
INTERNATIONAL STANDARD ISO 4531:2018(E)
Vitreous and porcelain enamels — Release from enamelled
articles in contact with food — Methods of test and limits
1 Scope
This document specifies a simulating method of test for determination of the release of metal-ions from
enamelled articles, which are intended to come into contact with food.
It also specifies limits for the release of metal-ions from enamelled articles, which are intended to come
into contact with food.
It is applicable to enamelled articles, including tanks and vessels, which are intended to be used for the
preparation, cooking, serving and storage of food.
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 648, Laboratory glassware — Single-volume pipettes
ISO 1042, Laboratory glassware — One-mark volumetric flasks
ISO 3585, Borosilicate glass 3.3 — Properties
ISO 3696, Water for analytical laboratory use — Specification and test methods
ISO 4788, Laboratory glassware — Graduated measuring cylinders
ISO 28764, Vitreous and porcelain enamels — Production of specimens for testing enamels on sheet steel,
sheet aluminium and cast iron
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https: //www .iso .org/obp
— IEC Electropedia: available at http: //www .electropedia .org/
4 Principle
For the release of metal-ions, if present, from the surfaces of articles or test specimen a mass fraction of
3 % (w/v) acetic acid solution shall be used. Three consecutive release tests shall be performed using
the same sample and a fresh test solution per test. The first two release test solutions (M1, M2) are
discarded. Only the third release test solution (M3) shall be used for analysis. A blank test (B1, B2,
B3) is required for each release test, of which only the third release test solution (B3) shall be used for
analysis.
ISO 4531:2018(E)
5 Reagents
During the determination, use only reagents of recognized analytical grade and only distilled water, or
water of equivalent purity (grade 3 water conf
...