| In the recent market there are so many kinds of precious metal jewelry. Due to its different formulation and unique manufacturing process, every precious metal sample should be analyzed accordingly with a reasonable analysis method. Five special samples encountered in the actual analysis work were jewelry coated with precious metals, jewelry containing other elements, 925 silver jewellery with surface finishes, 18K gold of three colors and jewelry with baneful elements. Density method, inductively coupled plasma-atomic emission spectrometry (ICP-AES), potentionmetric method along with fire assay were used as additional analysis means for these samples, when the accurate analysis results could not achieved simply by X-ray fluorescence spectrometric method (XRF). |
