EN ISO 11427:2024

SLOVENSKI STANDARD
01-julij-2024
Nakit in plemenite kovine - Določevanje srebra v zlitinah srebra - Potenciometrična
metoda z uporabo kalijevega bromida (ISO 11427:2024)
Jewellery and precious metals - Determination of silver in silver alloys - Potentiometry
using potassium bromide (ISO 11427:2024)
Schmuck und Edelmetalle - Bestimmung von Silber in Silberlegierungen - Potentiometrie
unter Verwendung von Kaliumbromid (ISO 11427:2024)
Joaillerie, bijouterie et métaux précieux - Dosage de l’argent dans les alliages d’argent -
Méthode potentiométrique utilisant le bromure de potassium (ISO 11427:2024)
Ta slovenski standard je istoveten z: EN ISO 11427:2024
ICS:
39.060 Nakit Jewellery
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 11427
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2024
EUROPÄISCHE NORM
ICS 39.060 Supersedes EN ISO 11427:2016
English Version
Jewellery and precious metals - Determination of silver -
Potentiometry using potassium bromide (ISO
11427:2024)
Joaillerie, bijouterie et métaux précieux - Dosage de Schmuck und Edelmetalle - Bestimmung von Silber in
l'argent - Méthode potentiométrique utilisant le Silberlegierungen - Potentiometrie unter Verwendung
bromure de potassium (ISO 11427:2024) von Kaliumbromid (ISO 11427:2024)
This European Standard was approved by CEN on 7 July 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
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 11427:2024 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 11427:2024) has been prepared by Technical Committee ISO/TC 174 "Jewellery
and precious metals" in collaboration with Technical Committee CEN/TC 410 “Jewellery and precious
metals” 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 October 2024, and conflicting national standards shall
be withdrawn at the latest by October 2024.
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 11427:2016.
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 11427:2024 has been approved by CEN as EN ISO 11427:2024 without any modification.

International
Standard
ISO 11427
Third edition
Jewellery and precious
2024-04
metals — Determination of
silver — Potentiometry using
potassium bromide
Joaillerie, bijouterie et métaux précieux — Dosage de l’argent —
Méthode potentiométrique utilisant le bromure de potassium
Reference number
ISO 11427:2024(en) © ISO 2024
ISO 11427:2024(en)
© ISO 2024
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 11427:2024(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Reagents . 1
6 Apparatus . 2
7 Sampling . 2
8 Procedure . 2
8.1 Determination of potassium bromide solution factor .2
8.1.1 General .2
8.1.2 Preparation of silver standards .2
8.1.3 Titration of the standard silver solution .2
8.1.4 Calculation of the potassium bromide standard solution factor .3
8.2 Determination .3
8.2.1 Preparation of the sample solution .3
8.2.2 Elimination of palladium .3
8.2.3 Titration of the sample solution .3
9 Calculation and expression of results . 3
9.1 Calculation .3
9.2 Repeatability .4
10 Test report . 4
Bibliography . 5

iii
ISO 11427:2024(en)
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 document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
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 Technical Committee ISO/TC 174, Jewellery and precious metals, in
collaboration with the European Committee for Standardization (CEN) Technical Committee CEN/TC 410,
Consumer confidence and nomenclature in the diamond industry, in accordance with the Agreement on
technical cooperation between ISO and CEN (Vienna Agreement).
This third edition cancels and replaces the second edition (ISO 11427:2014) which has been technically
revised.
The main changes are as follows:
— deletion of “in silver alloys” in the title;
— change of the scope by extending it to alloys containing from 100 to 999 parts per thousand;
— addition of oxygen content for reference pure silver in 5.4.
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
International Standard ISO 11427:2024(en)
Jewellery and precious metals — Determination of silver —
Potentiometry using potassium bromide
1 Scope
This document specifies a volumetric method for the determination of silver on a material considered
homogeneous. The silver content of the sample lies preferably between (100 and 999,0) parts per thousand
(‰) by mass. Fineness above 999,0 ‰ can be determined using a spectrosc
...