DIN Standards Committee Optics and Precision Mechanics
DIN EN ISO 11427
Jewellery - Determination of silver in silver jewellery alloys - Volumetric (potentiometric) method using potassium bromide (ISO 11427:2014); German version EN ISO 11427:2016
Schmuck - Bestimmung von Silber in Silberschmucklegierungen - Volumetrisches (potentiometrisches) Verfahren unter Verwendung von Kaliumbromid (ISO 11427:2014); Deutsche Fassung EN ISO 11427:2016
Overview
This document 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. This document (ISO 11427) has been prepared by Technical Committee ISO/TC 174 "Jewellery" (secretariat: DIN, Germany) of the International Organization for Standardization (ISO) and shall now be adopted as EN ISO 11427. The responsible German standardization committee is Working Committee NA 027-04-04 AA "Analysenmethoden zur Bestimmung des Feingehalts von Edelmetallen" ("Methods of analysis for determination of fineness of precious metals") at DIN Standards Committee Optics and Precision Mechanics (NAFuO).
Document: references other documents
Document: referenced in other documents
Responsible national committee
NA 027-04-04 AA - Methods of analysis for determination of fineness of precious metals
