An alternative to fire assay: confirming fineness by X-ray fluorescence
X-ray fluorescence can confirm the fineness of many precious-metal alloys without taking a sample. How far can it replace fire assay, and where are its limits?
Metals and alloys
X-ray fluorescence can confirm the fineness of many precious-metal alloys without taking a sample. How far can it replace fire assay, and where are its limits?