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 Cancelled

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

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. 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. This method is intended to be used as the referee method for the determination of fineness in alloys covered by ISO 9202.

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