NF EN 31427

NF EN 31427

June 1995
Standard Cancelled

Determination of silver in silver jewellery alloys. Volumetric (potentiometric) method using potassium bromide.

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Main informations

Collections

National standards and national normative documents

Publication date

June 1995

Number of pages

9 p.

Reference

NF EN 31427

ICS Codes

39.060   Jewellery

Classification index

A06-202

Print number

1 - 01/06/1995

International kinship

ISO 11427:1993

European kinship

EN 31427:1994
Standard replaced by (1)
NF EN ISO 11427
January 2017
Standard Current
Jewellery - Determination of silver in silver jewellery alloys - Volumetric (potentiometric) method using potassium bromide

<p>The method of ISO 11427:2014 describes a volumetric method for the determination of silver in jewellery alloys, preferably within the range of fineness stated in ISO 9202.</p> <p>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.</p> <p>This method is intended to be used as the referee method for the determination of fineness in alloys covered by ISO 9202.</p>

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