prEN ISO 11210

Jewellery and precious metals - Determination of platinum in platinum alloys - Gravimetric determination after precipitation using ammonium chloride (ISO/DIS 11210:2022)

This document specifies a gravimetric method for the determination of platinum in platinum alloys. The platinum content of sample lies preferably between 50 and 999 parts per thousands (‰) by weight. 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 Platin in Platinlegierungen - Gravimetrisches Verfahren nach Fällung mittels Ammoniumchlorid (ISO/DIS 11210:2022)

Joaillerie, bijouterie et métaux précieux - Dosage du platine dans les alliages de platine - Méthode gravimétrique après précipitation par le chlorure d’ammonium (ISO/DIS 11210:2022)

Nakit in plemenite kovine - Določevanje platine v zlitinah platine - Gravimetrično določanje po obarjanju z amonijevim kloridom (ISO/DIS 11210:2022)

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 11210:2022 - Jewellery and precious metals - Determination of platinum in platinum alloys - Gravimetric determination after precipitation using ammonium chloride (ISO/DIS 11210:2022)

RELATIONS

• Revised: EN ISO 11210:2016 - Jewellery - Determination of platinum in platinum jewellery alloys - Gravimetric method after precipitation of diammonium hexachloroplatinate (ISO 11210:2014)
• Effective Date: 19-Jan-2022

Standards Content (sample)

SLOVENSKI STANDARD
oSIST prEN ISO 11210:2022
01-julij-2022

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

določanje po obarjanju z amonijevim kloridom (ISO/DIS 11210:2022)
Jewellery and precious metals - Determination of platinum in platinum alloys -
Gravimetric determination after precipitation using ammonium chloride (ISO/DIS
11210:2022)
Schmuck und Edelmetalle - Bestimmung von Platin in Platinlegierungen -
Gravimetrisches Verfahren nach Fällung mittels Ammoniumchlorid (ISO/DIS
11210:2022)

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

Méthode gravimétrique après précipitation par le chlorure d’ammonium (ISO/DIS
11210:2022)
Ta slovenski standard je istoveten z: prEN ISO 11210
ICS:
39.060 Nakit Jewellery
oSIST prEN ISO 11210:2022 en,fr,de

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

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oSIST prEN ISO 11210:2022
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oSIST prEN ISO 11210:2022
DRAFT INTERNATIONAL STANDARD
ISO/DIS 11210
ISO/TC 174 Secretariat: DIN
Voting begins on: Voting terminates on:
2022-05-25 2022-08-17
Jewellery and precious metals — Determination of
platinum in platinum alloys — Gravimetric determination
after precipitation using ammonium chloride
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 11210:2022(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 11210:2022
ISO/DIS 11210:2022(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 11210:2022
ISO/DIS 11210:2022(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ..................................................................................................................................................................................... 1

3 Terms and definitions .................................................................................................................................................................................... 1

4 Principle ........................................................................................................................................................................................................................ 1

5 Reagents ........................................................................................................................................................................................................................ 2

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 platinum with ammonium chloride ............................................................................................ 3

9 Calculation and expression of results ........................................................................................................................................... 4

9.1 Calculation .................................................................................................................................................................................................. 4

9.2 Repeatability ............................................................................................................................................................................................ 5

10 Test report .................................................................................................................................................................................................................. 5

Annex A (informative) Reduction apparatus example ..................................................................................................................... 6

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

iii
© ISO 2022 – All rights reserved
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oSIST prEN ISO 11210:2022
ISO/DIS 11210:2022(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 11210:2014), 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;

— Addition of an alternative method for the filtration in Clause 8;
— Harmonization of method with ISO 11490.

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 11210:2022
DRAFT INTERNATIONAL STANDARD ISO/DIS 11210:2022(E)
Jewellery and precious metals — Determination of
platinum in platinum alloys — Gravimetric determination
after precipitation using ammonium chloride
1 Scope

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

platinum content of the sample lies preferably between 50 and 999 parts per thousand (‰) by weight.

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

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 11596, Jewellery and precious metals — Sampling of precious metals and precious metal alloys

3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

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 https:// www .electropedia .org/
3.1
platinum sponge

platinum obtained after calcination of the diammonium hexachloroplatinate precipitate

3.2
vacuum system

vacuum filtration system for the filtration of one or several samples simultaneou

...