Monthly Archive for: ‘June, 2013’

How do refiners assay precious metal scrap

XRF Analysis on a piece of jewellery

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 …

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