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SRPS EN 31427:2012

Determination of silver in silver jewellery alloys - Volumetric (potentiometric) method using potassium bromide (ISO 11427:1993)

Nov 29, 2012
95.99   Withdrawal of Standard   Feb 28, 2017

General information

95.99     Feb 28, 2017

ISS

PKS C174

European Norm

39.060  

English  

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Scope

The principle of the method specified is dissolving the sample in dilute nitric acid and determining the silver content of the resulting solution by titration with standard potassium bromide solution, using a potentiometric indication of the equivalence point. The alloys, preferably within the range of fineness stated in ISO 9202, 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.

Life cycle

NOW

WITHDRAWN
SRPS EN 31427:2012
95.99 Withdrawal of Standard
Feb 28, 2017

REVISED BY

WITHDRAWN
SRPS EN ISO 11427:2017

Related project

Adopted from EN 31427:1994

Adopted from EN 31427:1994/AC:1994

National regulations and standards

Pravilnik o načinu ispitivanja i žigosanja predmeta od dragocenih metala, dragocenih metala i njihovih legura

MINISTARSTVO PRIVREDE