NF ISO 11426

NF ISO 11426

April 2015
Standard Cancelled

Jewellery - Determination of gold in gold jewellery alloys - Cupellation method (fire assay)

ISO 11426:2014 specifies a cupellation method (fire assay) for the determination of gold in gold jewellery alloys. The gold content of the alloys should preferably lie between 333 and 999 parts per thousand (?).The procedure is applicable specifically to gold alloys incorporating silver, copper, and zinc. Some modifications are indicated where nickel and/or palladium are present in the so-called white gold alloys, as well as for alloys containing 990 or more parts per thousand (?) of gold.ISO 11426:2014 is intended to be used as the recommended method for the determination of fineness in alloys covered by ISO 9202.

See more
View the extract
Main informations

Collections

National standards and national normative documents

Publication date

April 2015

Number of pages

13 p.

Reference

NF ISO 11426

ICS Codes

39.060   Jewellery

Classification index

A06-201

Print number

1

International kinship

ISO 11426:2014
Sumary
Jewellery - Determination of gold in gold jewellery alloys - Cupellation method (fire assay)

ISO 11426:2014 specifies a cupellation method (fire assay) for the determination of gold in gold jewellery alloys. The gold content of the alloys should preferably lie between 333 and 999 parts per thousand (?).

The procedure is applicable specifically to gold alloys incorporating silver, copper, and zinc. Some modifications are indicated where nickel and/or palladium are present in the so-called white gold alloys, as well as for alloys containing 990 or more parts per thousand (?) of gold.

ISO 11426:2014 is intended to be used as the recommended method for the determination of fineness in alloys covered by ISO 9202.

Replaced standards (1)
NF EN ISO 11426
February 1999
Standard Cancelled
Determination of gold in gold jewellery alloys - Cupellation method (fire assay)

Le présent document prescrit une méthode de coupellation (essai au feu), pour le dosage de l'or contenu dans les alliages d'or jaune et les alliages d'or blanc, ainsi que les alliages ayant une teneur en or égale ou supérieure à 990 ‰ en masse, utilisés pour la bijouterie-joaillerie.

Standard replaced by (1)
NF EN ISO 11426
January 2017
Standard Cancelled
Jewellery - Determination of gold in gold jewellery alloys - Cupellation method (fire assay)

ISO 11426:2014 specifies a cupellation method (fire assay) for the determination of gold in gold jewellery alloys. The gold content of the alloys should preferably lie between 333 and 999 parts per thousand (?). The procedure is applicable specifically to gold alloys incorporating silver, copper, and zinc. Some modifications are indicated where nickel and/or palladium are present in the so-called white gold alloys, as well as for alloys containing 990 or more parts per thousand (?) of gold. ISO 11426:2014 is intended to be used as the recommended method for the determination of fineness in alloys covered by ISO 9202.

Table of contents
  • Avant-propos
    iv
  • Introduction
    v
  • 1 Domaine d'application
    1
  • 2 Références normatives
    1
  • 3 Principe
    1
  • 4 Réactifs
    1
  • 5 Appareillage
    2
  • 6 Échantillonnage
    3
  • 7 Mode opératoire
    3
  • 8 Calcul et expression des résultats
    6
  • 9 Rapport d'essai
    6
  • Bibliographie
    8
ZOOM ON ... the Requirements department
To comply with a standard, you need to quickly understand its issues in order to determine its impact on your activity.

The Requirements department helps you quickly locate within the normative text:
- mandatory clauses to satisfy,
- non-essential but useful clauses to know, such as permissions and recommendations.

The identification of these types of clauses is based on the document “ISO / IEC Directives, Part 2 - Principles and rules of structure and drafting of ISO documents ”as well as on a constantly enriched list of verbal forms.

With Requirements, quickly access the main part of the normative text!

With Requirements, quickly access the main part of the normative text!
What is the Redline format?
The Redline + service - standards comparator allows you to easily and simply identify major changes between the current standard and its last canceled version.

At a glance, you will be able to identify the additions, deletions or modifications to a text, table, figure and formula.
At a glance, you will be able to identify the additions, deletions or modifications to a text, table, figure and formula

The Redlines + service is offered to you on the collection of French standards in force, in French language and in HTML and PDF format.

For an overview of the service, click on View a standard in redline format
Need to identify, monitor and decipher standards?

COBAZ is the simple and effective solution to meet the normative needs related to your activity, in France and abroad.

Available by subscription, CObaz is THE modular solution to compose according to your needs today and tomorrow. Quickly discover CObaz!

Request your free, no-obligation live demo

I discover COBAZ