Jewellery and precious metals — Determination of silver — Potentiometry using sodium chloride or potassium chloride

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 chlorure de sodium ou le chlorure de potassium

Le présent document spécifie une méthode volumétrique de dosage de l’argent sur un matériau considéré comme homogène. La teneur en argent de l’échantillon est de préférence comprise entre (100 et 999,0) millièmes (‰) en masse. Les titres supérieurs à 999,0 ‰ peuvent être déterminés à l’aide d’une méthode de spectroscopie par différence (par exemple, ISO 15096). La présente méthode est destinée à servir de référence pour la détermination du titre des alliages traités dans l’ISO 9202.

General Information

Status
Published
Publication Date
07-Apr-2024
Current Stage
6060 - International Standard published
Start Date
08-Apr-2024
Due Date
06-Oct-2024
Completion Date
08-Apr-2024
Ref Project

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ISO 13756:2024 - Jewellery and precious metals — Determination of silver — Potentiometry using sodium chloride or potassium chloride Released:8. 04. 2024
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ISO 13756:2024 - Joaillerie, bijouterie et métaux précieux — Dosage de l'argent — Méthode potentiométrique utilisant le chlorure de sodium ou le chlorure de potassium Released:8. 04. 2024
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Standards Content (Sample)

International
Standard
ISO 13756
Third edition
Jewellery and precious metals —
2024-04
Determination of silver —
Potentiometry using sodium
chloride or potassium chloride
Joaillerie, bijouterie et métaux précieux — Dosage de l'argent —
Méthode potentiométrique utilisant le chlorure de sodium ou le
chlorure de potassium
Reference number
ISO 13756:2024(en) © ISO 2024

---------------------- Page: 1 ----------------------
ISO 13756:2024(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: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland

© ISO 2024 – All rights reserved
ii

---------------------- Page: 2 ----------------------
ISO 13756:2024(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 sodium chloride or potassium chloride standard solution factor .2
8.1.1 General .2
8.1.2 Preparation of silver standards .2
8.1.3 Titration of standard silver solution .2
8.1.4 Calculation of sodium chloride or potassium chloride 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 .
...

Norme
internationale
ISO 13756
Troisième édition
Joaillerie, bijouterie et métaux
2024-04
précieux — Dosage de l'argent
— Méthode potentiométrique
utilisant le chlorure de sodium ou le
chlorure de potassium
Jewellery and precious metals — Determination of silver —
Potentiometry using sodium chloride or potassium chloride
Numéro de référence
ISO 13756:2024(fr) © ISO 2024

---------------------- Page: 1 ----------------------
ISO 13756:2024(fr)
DOCUMENT PROTÉGÉ PAR COPYRIGHT
© ISO 2024
Tous droits réservés. Sauf prescription différente ou nécessité dans le contexte de sa mise en œuvre, aucune partie de cette
publication ne peut être reproduite ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique,
y compris la photocopie, ou la diffusion sur l’internet ou sur un intranet, sans autorisation écrite préalable. Une autorisation peut
être demandée à l’ISO à l’adresse ci-après ou au comité membre de l’ISO dans le pays du demandeur.
ISO copyright office
Case postale 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Genève
Tél.: +41 22 749 01 11
E-mail: copyright@iso.org
Web: www.iso.org
Publié en Suisse

© ISO 2024 – Tous droits réservés
ii

---------------------- Page: 2 ----------------------
ISO 13756:2024(fr)
Sommaire Page
Avant-propos .iv
1 Domaine d’application . 1
2 Références normatives . 1
3 Termes et définitions . 1
4 Principe. 1
5 Réactifs . 1
6 Appareillage . 2
7 Échantillonnage . 2
8 Mode opératoire . 2
8.1 Détermination du facteur de la solution étalon de chlorure de sodium ou de chlorure
de potassium .2
8.1.1 Généralités .2
8.1.2 Préparation des étalons d’argent .2
8.1.3 Titrage de la solution étalon d’argent .3
8.1.4 Calcul du facteur de la solution étalon de chlorure de sodium ou de chlorure de
potassium .3
8.2 Dosage .3
8.2.1 Préparation de la solution d’échantillon .3
8.2.2 Élimination du palladium .
...

International
Standard
ISO 13756
Third edition
Jewellery and precious metals —
Determination of silver —
Potentiometry using sodium
chloride or potassium chloride
PROOF/ÉPREUVE
Reference number
ISO 13756:2024(en) © ISO 2024

---------------------- Page: 1 ----------------------
ISO 13756:2024(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: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
PROOF/ÉPREUVE
© ISO 2024 – All rights reserved
ii

---------------------- Page: 2 ----------------------
ISO 13756:2024(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 sodium chloride or potassium chloride standard solution factor .2
8.1.1 General .2
8.1.2 Preparation of silver standards .2
8.1.3 Titration of standard silver solution .2
8.1.4 Calculation of sodium chloride or potassium chloride 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 .
...

Style Definition
ISO/PRF 13756:2024(en)
...
Formatted: zzCover large
ISO /TC 174/WG 1
Formatted
...
Secretariat: DIN
Date: 2024-01-25xx
Formatted: Font: Not Bold
Formatted: Cover Title_A1
Jewellery and precious metals — Determination of silver —
Potentiometry using sodium chloride or potassium chloride
Joaillerie, bijouterie etmetaux precieux — Dosage de l’argent — Potentiométrie utilisant le chlorure de
sodium ou le chlorure de potassium

---------------------- Page: 1 ----------------------
PROOF

---------------------- Page: 2 ----------------------
ISO/PRF 13756:2024(en)
Formatted: Font: Bold
Formatted: HeaderCentered
Formatted: Right: 42.55 pt, Bottom: 28.35 pt, Gutter:
© ISO 2024
0 pt, Header distance from edge: 36 pt, Footer
distance from edge: 14.15 pt
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,
Commented [eXtyles1]: The reference "ISO 2024" is to a
or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO
withdrawn standard
at the address below or ISO’s member body in the country of the requester.
Formatted: Indent: Left: 0 pt, Right: 0 pt, Space
Before: 0 pt, No page break before, Adjust space
ISO copyright office
between Latin and Asian text, Adjust space between
CP 401 • Ch. de Blandonnet 8
Asian text and numbers
CH-1214 Vernier, Geneva
Formatted: Default Paragraph Font
Phone: + 41 22 749 01 11
EmailE-mail: copyright@iso.org
Formatted: Default Paragraph Font
Website: www.iso.orgwww.iso.org
Formatted: French (France)
Published in Switzerland
Formatted: French (France)
Formatted: French (France)
Formatted: FooterPageRomanNumber
© ISO 2024 – All rights reserved

ii

---------------------- Page: 3 ----------------------
ISO/PRF 13756:2024(en)
Formatted: Font: 11 pt, Bold
Formatted: Font: 11 pt, Bold
Formatted: HeaderCentered, Left, Space After: 0 pt,
Contents
Line spacing: single
Foreword . v
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 sodium chloride or potassium chloride standard solution factor . 2
8.1.1 General . 2
8.1.2 Preparation of silver standards . 2
8.1.3 Titration of standard silver solution . 2
8.1.4 Calculation of sodium chloride or potassium chloride 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 .
...

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