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See Chinese contents: GB/T 18043-2013 GB/T 18043-2013: Jewellery -- Determination of precious metal content -- Method using X-ray fluorescence spectrometry
This Standard specifies the methods and requirements for applying X-ray fluorescence spectrometry to determine the precious metal content in jewellery. This Standard applies to qualitative analysis for jewellery and other art-wares. And it also applies to the screening test of precious metal content (gold, silver, platinum, and palladium) in jewellery and other art-wares.
