Chinese legal requirements

 Regulatory requirements:


  GB 28480-2012 Limits of harmful elements for ornaments


  Specification and nomenclature for the purity of precious metals in jewelry


  Test criteria:


  Jewelry -- Determination of nickel release -- Spectrometric method,


  Jewelry -- Determination of nickel content -- Flame atomic absorption spectrometry


  GB/T 28485-2012 Coated jewelry -- Determination of nickel release -- Wear and corrosion simulation method


  Jewelry -- Determination of harmful elements -- Fluorescence spectrometric method,


  Jewelry -- Determination of harmful elements -- Spectrometric method,


  GB/T 28019-2011 Jewelry -- Determination of hexavalent chromium -- Diphenylcarbonic dihydrazine spectrophotometric method