BS EN ISO 11427:2016

What is ISO 11427 – Determination of silver in silver jewellery alloys using potassium bromide about? 

Silver is one of the rare and costly metals found on earth. Apart from high-rate conductivity silver is a premium metal for ornament production purposes.  

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

Who is ISO 11427 - Determination of silver in silver jewellery alloys using potassium bromide for?  

ISO 11427 guidelines on requirements and testing procedures for child-resistant non-reclosable packaging is useful for: 

• Silver jewellery manufacturers. 
• Laboratory research personnel  
• Product development teams/innovation teams 
• Quality control personnel 

Why should you use ISO 11427 - Determination of silver in silver jewellery alloys using potassium bromide? 

Alloys may usually 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. 

ISO 11427 provides guidelines, according to which the sample is dissolved in dilute nitric acid. The silver content of the resulting solution is determined by titration with standard potassium bromide solution using a potentiometric indication of the equivalence point. Thus, the use of ISO 11427 guidelines for the process of titration in determining the presence of effluents and the quantity of silver in the silver jewellery alloys.