This International Standard method 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.
ISO 11427:2014 Referenced Document
ISO 11596:2008 Jewellery - Sampling of precious metal alloys for and in jewellery and associated products
ISO 9202:1991 Jewellery; fineness of precious metal alloys