ISO 13756:2015

INTERNATIONAL ISO
STANDARD 13756
Second edition
2015-02-01
Jewellery — Determination of
silver in silver jewellery alloys —
Volumetric (potentiometric) method
using sodium chloride or potassium
chloride
Joaillerie — Dosage de l’argent dans les alliages d’argent pour la
bijouterie-joaillerie — Méthode volumétrique (potentiométrique)
utilisant le chlorure de sodium ou le chlorure de potassium
Reference number
ISO 13756:2015(E)
©
ISO 2015

---------------------- Page: 1 ----------------------
ISO 13756:2015(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2015
All rights reserved. Unless otherwise specified, 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
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2015 – All rights reserved

---------------------- Page: 2 ----------------------
ISO 13756:2015(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Principle . 1
4 Reagents . 1
5 Apparatus . 2
6 Sampling . 2
7 Procedure. 2
7.1 Determination of sodium chloride or potassium chloride standard solution factor . 2
7.1.1 Preparation of silver standards . 2
7.1.2 Titration of standard silver solution . 2
7.1.3 Calculation of sodium chloride or potassium chloride standard solution factor . 3
7.2 Determination . 3
7.2.1 Preparation of the sample solution . 3
7.2.2 Elimination of palladium . 3
7.2.3 Titration of the sample solution . 3
8 Calculation and expression of results . 3
8.1 Calculation . 3
8.2 Repeatability .
...