ISO 13756:2015

Jewellery — Determination of silver in silver jewellery alloys — Volumetric (potentiometric) method using sodium chloride or potassium chloride

ISO 13756:2015 specifies a volumetric method for the determination of silver in silver jewellery alloys, preferably within the range of fineness stated in ISO 9202. These alloys may contain copper, zinc, cadmium, and palladium. Apart from palladium, which must be precipitated before commencing titration, these elements do not interfere with this method of determination. NOTE This method is an alternative recommended method to ISO 11427.

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

General Information

• Status: Withdrawn
• Publication Date: 19-Jan-2015
• ICS: 39.060 - Jewellery
• Technical Committee: ISO/TC 174 - Jewellery and precious metals
• Drafting Committee: ISO/TC 174/WG 1 - Methods for determining fineness
• Current Stage: 9599 - Withdrawal of International Standard
• Completion Date: 08-Apr-2024

Relations

• Revised: ISO 13756:2024 - Jewellery and precious metals — Determination of silver — Potentiometry using sodium chloride or potassium chloride
• Effective Date: 06-Jun-2022
• Revises: ISO 13756:1997 - Determination of silver in silver jewellery alloys — Volumetric (potentiometric) method using sodium chloride or potassium chloride
• Effective Date: 13-Nov-2010

Standards Content (Sample)

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

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ISO 13756:2015(E)

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ii © ISO 2015 – All rights reserved

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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 .
...