How do refiners assay precious metal scrap
Refiners typically assay precious metal scrap by means of x-ray fluorescence spectroscopy. This entails melting the precious metal scrap in a furnace and taking a 2-3g sample via vacuum pin tube. Following this, x-ray technology is used to determine the composition of the sample at the atomic level. Whilst not as accurate as fire-assay, XRF technology can obtain accuracies of …