ISO 11427:2024

Jewellery and precious metals — Determination of silver — Potentiometry using potassium bromide

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 spectroscopy method by difference (e.g. ISO 15096). This method is intended to be used as the reference method for the determination of fineness in alloys covered by ISO 9202.

Joaillerie, bijouterie et métaux précieux — Dosage de l’argent —Méthode potentiométrique utilisant le bromure de potassium

General Information

• Status: Published
• Publication Date: 04-Apr-2024
• ICS: 39.060 - Jewellery
• Technical Committee: ISO/TC 174 - Jewellery and precious metals
• Drafting Committee: ISO/TC 174 - Jewellery and precious metals
• Current Stage: 6060 - International Standard published
• Start Date: 05-Apr-2024
• Due Date: 06-Oct-2024
• Completion Date: 05-Apr-2024

Relations

• Consolidates: ISO 23226:2020 - Corrosion of metals and alloys — Guidelines for the corrosion testing of metals and alloys exposed in deep-sea water
• Effective Date: 06-Jun-2022
• Revises: ISO 11427:2014 - Jewellery — Determination of silver in silver jewellery alloys — Volumetric (potentiometric) method using potassium bromide
• Effective Date: 06-Jun-2022

Standards Content (Sample)

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

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ISO 11427:2024(en)
COPYRIGHT PROTECTED DOCUMENT
© 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: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland

© ISO 2024 – All rights reserved
ii

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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 .
...

International
Standard
ISO 11427
Third edition
Jewellery and precious metals —
Determination of silver —
Potentiometry using potassium
bromide
PROOF/ÉPREUVE
Reference number
ISO 11427:2024(en) © ISO 2024

---------------------- Page: 1 ----------------------
ISO 11427:2024(en)
COPYRIGHT PROTECTED DOCUMENT
© 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: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
PROOF/ÉPREUVE
© ISO 2024 – All rights reserved
ii

---------------------- Page: 2 ----------------------
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 .
...

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ISO/PRF 11427:2024(en)
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ISO /TC 174/WG 1
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Date: 2024-01-25xx
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Jewellery and precious metals — Determination of silver —
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Potentiometry using potassium bromide .
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Joaillerie, bijouterie et métaux précieux— Dosage de l’argent —Potentiométrie utilisant le bromure de
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potassium
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PROOF

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ISO/PRF 11427:2024(en)
Formatted: Font: 11 pt, Bold
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© ISO 2024
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All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication
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may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying,
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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. Commented [eXtyles1]: The reference "ISO 2024" is to a
withdrawn standard
ISO copyright office
Formatted: Default Paragraph Font
CP 401 • Ch. de Blandonnet 8
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CH-1214 Vernier, Geneva
Phone: + 41 22 749 01 11
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EmailE-mail: [e-mail]
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Published in Switzerland
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ISO/PRF 11427:2024(en)
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Contents
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stops: Not at 13.42 cm
Foreword . vi
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 .
...