prEN ISO 11490

Jewellery and precious metals - Determination of palladium in palladium alloys - Gravimetric determination after precipitation using dimethylglyoxime (ISO/DIS 11490:2022)

This document specifies a gravimetric method for the determination of palladium in palladium alloys. The palladium content of the sample lies preferably between 50 and 999 parts per thousand (‰). 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.

Schmuck und Edelmetalle - Bestimmung von Palladium in Palladiumlegierungen - Gravimetrische Bestimmung nach Fällung mit Dimethylglyoxim (ISO/DIS 11490:2022)

Joaillerie, bijouterie et métaux précieux - Dosage du palladium dans les alliages de palladium - Méthode gravimétrique après précipitation par la diméthylglyoxime (ISO/DIS 11490:2022)

Nakit in plemenite kovine - Določevanje paladija v zlitinah paladija - Gravimetrično določanje po obarjanju z dimetilglioksimom (ISO/DIS 11490:2022)

General Information

• Status: Not Published
• ICS: 39.060 - Jewellery
• Technical Committee: CEN/SS M21 - Precious metals - Applications in jewellery and associated products
• Current Stage: 4599 - Dispatch of FV draft to CMC - Finalization for Vote
• Due Date: 21-Oct-2022
• Completion Date: 21-Oct-2022
• Ref Project: oSIST prEN ISO 11490:2022 - Jewellery and precious metals - Determination of palladium in palladium alloys - Gravimetric determination after precipitation using dimethylglyoxime (ISO/DIS 11490:2022)

RELATIONS

• Revised: EN ISO 11490:2016 - Jewellery - Determination of palladium in palladium jewellery alloys - Gravimetric determination with dimethylglyoxime (ISO 11490:2015)
• Effective Date: 19-Jan-2022

Standards Content (sample)

SLOVENSKI STANDARD
oSIST prEN ISO 11490:2022
01-julij-2022

Nakit in plemenite kovine - Določevanje paladija v zlitinah paladija - Gravimetrično

določanje po obarjanju z dimetilglioksimom (ISO/DIS 11490:2022)
Jewellery and precious metals - Determination of palladium in palladium alloys -
Gravimetric determination after precipitation using dimethylglyoxime (ISO/DIS
11490:2022)
Schmuck und Edelmetalle - Bestimmung von Palladium in Palladiumlegierungen -
Gravimetrische Bestimmung nach Fällung mit Dimethylglyoxim (ISO/DIS 11490:2022)

Joaillerie, bijouterie et métaux précieux - Dosage du palladium dans les alliages de

palladium - Méthode gravimétrique après précipitation par la diméthylglyoxime (ISO/DIS

11490:2022)
Ta slovenski standard je istoveten z: prEN ISO 11490
ICS:
39.060 Nakit Jewellery
oSIST prEN ISO 11490:2022 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN ISO 11490:2022
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oSIST prEN ISO 11490:2022
DRAFT INTERNATIONAL STANDARD
ISO/DIS 11490
ISO/TC 174 Secretariat: DIN
Voting begins on: Voting terminates on:
2022-05-25 2022-08-17
Jewellery and precious metals — Determination
of palladium in palladium alloys — Gravimetric
determination after precipitation using dimethylglyoxime

Joaillerie, bijouterie et métaux précieux — Dosage du palladium dans les alliages de palladium— Méthode

gravimétrique après précipitation avec de la diméthylglyoximeue
ICS: 39.060
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 11490:2022(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 2022
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oSIST prEN ISO 11490:2022
ISO/DIS 11490:2022(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2022

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
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Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
© ISO 2022 – All rights reserved
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oSIST prEN ISO 11490:2022
ISO/DIS 11490:2022(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 Preparation of samples free of silver .................................................................................................................................. 3

8.2 Preparation of samples containing silver ....................................................................................................................... 3

8.3 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 ..................................................................................................................... 6

Bibliography ................................................................................................................................................................................................................................ 7

iii
© ISO 2022 – All rights reserved
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oSIST prEN ISO 11490:2022
ISO/DIS 11490:2022(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.
The committee responsible for this document is ISO/TC 174, Jewellery.

This third edition cancels and replaces the second edition (ISO 11490:2015), which has been technically

revised with the following changes:

— 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.
© ISO 2022 – All rights reserved
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oSIST prEN ISO 11490:2022
DRAFT INTERNATIONAL STANDARD ISO/DIS 11490:2022(E)
Jewellery and precious metals — Determination
of palladium in palladium alloys — Gravimetric
determination after precipitation using dimethylglyoxime
1 Scope

This document specifies a gravimetric method for the determination of palladium in palladium alloys.

The palladium content of the sample lies preferably between 50
...