I.S. EN 31426:1994
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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DETERMINATION OF GOLD IN GOLD JEWELLERY ALLOYS - CUPELLATION METHOD (FIRE ASSAY)
21-05-1999
12-01-2013
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Only cited Standards give presumption of conformance to New Approach Directives/Regulations.
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Cooperating organizations
National foreword
Foreword
1. Scope
2. Normative reference
3. Principle
4. Reagents
5. Apparatus
6. Sampling
7. Procedure
8. Expression of results
9. Notes on procedure
10. Test report
Annex
ZA. (normative) Normative references to international
publications with their relevant European
publications
National annexes
NA. (informative) Committees responsible
NB. (informative) Cross-references
Describes a cupellation method (fire assay) for the determination of gold in gold jewellery alloys. Applies specifically to gold alloys incorporating silver, copper and zinc.
| DocumentType |
Standard
|
| PublisherName |
National Standards Authority of Ireland
|
| Status |
Superseded
|
| SupersededBy |
| Standards | Relationship |
| SN EN 31426 : 1994 | Identical |
| BS EN 31426:1994 | Identical |
| UNE-EN 31426:1996 | Identical |
| NF EN 31426 : 1994 | Identical |
| EN 31426 : 1994 | Identical |
| UNI EN 31426 : 1997 | Identical |
| NBN EN 31426 : 1994 | Identical |
| DIN EN 31426:1994-09 | Identical |
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