EN ISO 11490:2023

SLOVENSKI STANDARD
01-maj-2023
Nakit in plemenite kovine - Določevanje paladija - Gravimetrija z dimetilglioksimom
(ISO 11490:2023)
Jewellery and precious metals - Determination of palladium - Gravimetry using
dimethylglyoxime (ISO 11490:2023)
Schmuck und Edelmetalle - Bestimmung von Palladium - Gravimetrie mittels
Dimethylglyoxim (ISO 11490:2023)
Joaillerie, bijouterie et métaux précieux - Dosage du palladium - Méthode gravimétrique
utilisant la diméthylglyoxime (ISO 11490:2023)
Ta slovenski standard je istoveten z: EN ISO 11490:2023
ICS:
39.060 Nakit Jewellery
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 11490
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2023
EUROPÄISCHE NORM
ICS 39.060 Supersedes EN ISO 11490:2016
English Version
Jewellery and precious metals - Determination of
palladium - Gravimetry using dimethylglyoxime (ISO
11490:2023)
Joaillerie, bijouterie et métaux précieux - Dosage du Schmuck und Edelmetalle - Bestimmung von Palladium
palladium - Méthode gravimétrique utilisant la - Gravimetrie mittels Dimethylglyoxim (ISO
diméthylglyoxime (ISO 11490:2023) 11490:2023)
This European Standard was approved by CEN on 19 February 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 11490:2023 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 11490:2023) has been prepared by Technical Committee ISO/TC 174 "Jewellery
and precious metals" in collaboration with CCMC.
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 September 2023, and conflicting national standards
shall be withdrawn at the latest by September 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 11490:2016.
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 11490:2023 has been approved by CEN as EN ISO 11490:2023 without any modification.

INTERNATIONAL ISO
STANDARD 11490
Third edition
2023-02
Jewellery and precious metals —
Determination of palladium —
Gravimetry using dimethylglyoxime
Joaillerie, bijouterie et métaux précieux — Dosage du palladium —
Méthode gravimétrique utilisant la diméthylglyoxime
Reference number
ISO 11490:2023(E)
ISO 11490:2023(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 11490:2023(E)
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 Preliminary analysis . 2
8.2 Preparation of samples free of silver . 3
8.3 Preparation of samples containing silver . 3
8.4 Precipitation of palladium with dimethylglyoxime . 3
9 Calculation and expression of results . 4
9.1 Calculation . 4
9.2 Repeatability . 4
10 Test report . 4
Annex A (informative) Reduction apparatus example . 5
Bibliography . 6
iii
ISO 11490:2023(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/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/SSM21, Precious metals — Applications in jewellery and associated products, in
collaboration with ISO Technical Committee TC 174, Jewellery, in accordance with the agreement on
technical cooperation between ISO and CEN (Vienna Agreement).
This third edition cancels and replaces the second edition (ISO 11490:2015), which has been technically
revised.
The main changes are as follows:
— extension of the scope of application to all precious metal alloys beyond the jewellery sector;
— clarification of the fineness for which the test is suitable;
— addition of a specific preparation for samples containing a significant amount of silver in Clause 8;
— change of precipitation method in Clause 8;
— suppression of the use of hydrofluoric acid and sulfuric acid;
— harmonization of method with ISO 11210.
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 11490:2023(E)
Jewellery and precious metals — Determination of
palladium — Gravimetry using dimethylglyoxime
1 Scope
This document specifies a gravimetric method for the determination of palladium on a material
considered homogeneous. The palladium content of the sample lies preferably between 50 and 999
parts per thousand (‰) by mass. Fineness above 999 ‰ can be determined using a spectroscopy
method by difference (e.g. ISO 15093).
This method is also intended to be used as one of the recommended methods for the determination of
fineness in jewellery alloys covered by ISO 9202.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
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/
3.1
palladium sponge
palladium obtained after calcination of the palladium dimethylglyoxime precipitate
4 Principle
The sample is dissolved in aqua regia. Palladium is precipitated with dimethylglyoxime. The palladium
dimethylglyoxime complex precipitate is converted by ignition to metallic palladium which is weighed.
If present, silver is separated as silver chloride.
Co-precipitated alloying elements are tested in the re-dissolved palladium sponge and measured using,
for example, an inductively coupled plasma optical emission spectrometer (ICP-OES), and a correction
applied.
5 Reagents
...